You searched for subject:(Pneumatics).
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University of Houston
1.
Rifenburgh, William McKenzie.
Fluid Actuation for Imaging Compatible Devices.
Degree: MS, Aerospace Engineering, 2014, University of Houston
URL: http://hdl.handle.net/10657/1205 
► The use of robots in imaging devices is becoming more prominent with the development of image guided surgery robots and imaging related research requiring mechanical…
(more)
▼ The use of robots in imaging devices is becoming more prominent with the
development of image guided surgery robots and imaging related research
requiring mechanical actuation. Many such robotic systems exist today but
unfortunately cause imaging distortion and artifacts due to the presence of
actuators and control electronics that are incompatible with the imaging devices
used. One solution to this problem is the use of fluid actuators. Fluid actuators
can be made entirely of polymers that are fully compatible with both MRI and CT
scanning. In the course of this work, the modeling, identification and control of
hydraulic and pneumatic linear piston-cylinder actuators was investigated and a
performance comparison of the two types of actuation in various medical robotics
applications was made. The results show that hydraulic systems are better suited
for precise positioning tasks and haptic force-feedback teleoperation and
pneumatic systems are better suited for applications requiring compliant motion.
Advisors/Committee Members: Grigoriadis, Karolos M. (advisor), Rao, Jagannatha R. (committee member), Garbey, Marc (committee member).
Subjects/Keywords: Pneumatics; Hydraulics; Robotics; Teleoperation; Medicine
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APA (6th Edition):
Rifenburgh, W. M. (2014). Fluid Actuation for Imaging Compatible Devices. (Masters Thesis). University of Houston. Retrieved from http://hdl.handle.net/10657/1205
Chicago Manual of Style (16th Edition):
Rifenburgh, William McKenzie. “Fluid Actuation for Imaging Compatible Devices.” 2014. Masters Thesis, University of Houston. Accessed April 15, 2021.
http://hdl.handle.net/10657/1205.
MLA Handbook (7th Edition):
Rifenburgh, William McKenzie. “Fluid Actuation for Imaging Compatible Devices.” 2014. Web. 15 Apr 2021.
Vancouver:
Rifenburgh WM. Fluid Actuation for Imaging Compatible Devices. [Internet] [Masters thesis]. University of Houston; 2014. [cited 2021 Apr 15].
Available from: http://hdl.handle.net/10657/1205.
Council of Science Editors:
Rifenburgh WM. Fluid Actuation for Imaging Compatible Devices. [Masters Thesis]. University of Houston; 2014. Available from: http://hdl.handle.net/10657/1205
2.
Doedens, D.C. (author).
Optimal CO? pressure for 'stand alone' pneumatic systems.
Degree: 2015, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:c70cc714-959f-48e1-96b1-fcdedddce371
► CO2 powered actuators are a viable alternative in prostheses and robotics. The gas supply is generally limited in such applications, and calls for an optimal…
(more)
▼ CO2 powered actuators are a viable alternative in prostheses and robotics. The gas supply is generally limited in such applications, and calls for an optimal system pressure to minimize gas-consumption. Previous work which discusses the optimal pressure was not verifiable, or strictly theoretical. The theoretical work was unintuitive, but did result in an optimal pressure level of 1.2 MPa, irrespective of the required output force. This research presents a simplified theoretical background, and verifies the optimum by measurements. The simplified theory offers improved insight into the existence of an optimal supply pressure and locates it at 1.42 MPa. Compensation for atmospheric pressure strongly affects cylinder size at low system pressures and above the optimum, as CO2 approaches its critical point, gas consumption increases with the density of the gas. The experiments show an optimum at 1.12 MPa, with a bound of -0.10 MPa and +0.30 MPa. The uncertainty in the location of the minimum gas-consumption reflects the challenges of accurately performing the measurements, as well as the shallow curve where the minimum is found. The presented results support the optimal supply pressure found in literature, and when optimizing a pneumatic system for CO2 use, 1.2 MPa is therefore a good choice.
BMD
BioMechanical Engineering
Mechanical, Maritime and Materials Engineering
Advisors/Committee Members: Van der Helm, F.C.T. (mentor), Plettenburg, D.H. (mentor).
Subjects/Keywords: pneumatics; CO2; gas-consumption
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APA (6th Edition):
Doedens, D. C. (. (2015). Optimal CO? pressure for 'stand alone' pneumatic systems. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:c70cc714-959f-48e1-96b1-fcdedddce371
Chicago Manual of Style (16th Edition):
Doedens, D C (author). “Optimal CO? pressure for 'stand alone' pneumatic systems.” 2015. Masters Thesis, Delft University of Technology. Accessed April 15, 2021.
http://resolver.tudelft.nl/uuid:c70cc714-959f-48e1-96b1-fcdedddce371.
MLA Handbook (7th Edition):
Doedens, D C (author). “Optimal CO? pressure for 'stand alone' pneumatic systems.” 2015. Web. 15 Apr 2021.
Vancouver:
Doedens DC(. Optimal CO? pressure for 'stand alone' pneumatic systems. [Internet] [Masters thesis]. Delft University of Technology; 2015. [cited 2021 Apr 15].
Available from: http://resolver.tudelft.nl/uuid:c70cc714-959f-48e1-96b1-fcdedddce371.
Council of Science Editors:
Doedens DC(. Optimal CO? pressure for 'stand alone' pneumatic systems. [Masters Thesis]. Delft University of Technology; 2015. Available from: http://resolver.tudelft.nl/uuid:c70cc714-959f-48e1-96b1-fcdedddce371
Georgia Tech
3.
Ford, William Hoyt.
Stability analysis of a high pressure pneumatic mechanical system.
Degree: MS, Engineering mechanics, 1962, Georgia Tech
URL: http://hdl.handle.net/1853/19996
Subjects/Keywords: Stability; Pneumatics
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APA (6th Edition):
Ford, W. H. (1962). Stability analysis of a high pressure pneumatic mechanical system. (Masters Thesis). Georgia Tech. Retrieved from http://hdl.handle.net/1853/19996
Chicago Manual of Style (16th Edition):
Ford, William Hoyt. “Stability analysis of a high pressure pneumatic mechanical system.” 1962. Masters Thesis, Georgia Tech. Accessed April 15, 2021.
http://hdl.handle.net/1853/19996.
MLA Handbook (7th Edition):
Ford, William Hoyt. “Stability analysis of a high pressure pneumatic mechanical system.” 1962. Web. 15 Apr 2021.
Vancouver:
Ford WH. Stability analysis of a high pressure pneumatic mechanical system. [Internet] [Masters thesis]. Georgia Tech; 1962. [cited 2021 Apr 15].
Available from: http://hdl.handle.net/1853/19996.
Council of Science Editors:
Ford WH. Stability analysis of a high pressure pneumatic mechanical system. [Masters Thesis]. Georgia Tech; 1962. Available from: http://hdl.handle.net/1853/19996
UCLA
4.
Park, Daeun.
Pneumatics powered by liquid nitrogen for robotics applications.
Degree: Mechanical Engineering, 2016, UCLA
URL: http://www.escholarship.org/uc/item/8nw9g1qj
► Despite its potential as a high efficiency power-actuation mechanism, cryogen powered pneumatics system have been one of the least popular choice for robotic engineers due…
(more)
▼ Despite its potential as a high efficiency power-actuation mechanism, cryogen powered pneumatics system have been one of the least popular choice for robotic engineers due to its nonlinearities and other modeling complexities. For this thesis, an ideal model of liquid nitrogen powered pressurized vessel for pneumatic muscle actuator application with minimal complexity has initially been developed. Few control algorithms have been tested to investigate the robustness of the pneumatic force generation in creating stable profiles of output pressure of pressurized vessel. Then finally, a more realistic, low-cost, portable, increased-safety solution, both in terms of physical size and control platform, has been provided to meet the practical needs in the field of advanced robotics.
Subjects/Keywords: Mechanical engineering; Algorithm; Controls; Mechanisms; Pneumatics; Robotics
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APA (6th Edition):
Park, D. (2016). Pneumatics powered by liquid nitrogen for robotics applications. (Thesis). UCLA. Retrieved from http://www.escholarship.org/uc/item/8nw9g1qj
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Park, Daeun. “Pneumatics powered by liquid nitrogen for robotics applications.” 2016. Thesis, UCLA. Accessed April 15, 2021.
http://www.escholarship.org/uc/item/8nw9g1qj.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Park, Daeun. “Pneumatics powered by liquid nitrogen for robotics applications.” 2016. Web. 15 Apr 2021.
Vancouver:
Park D. Pneumatics powered by liquid nitrogen for robotics applications. [Internet] [Thesis]. UCLA; 2016. [cited 2021 Apr 15].
Available from: http://www.escholarship.org/uc/item/8nw9g1qj.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Park D. Pneumatics powered by liquid nitrogen for robotics applications. [Thesis]. UCLA; 2016. Available from: http://www.escholarship.org/uc/item/8nw9g1qj
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Guelph
5.
Jackson, Gregory.
Development of a Pneumatic Hand Training Device for Stroke Rehabilitation.
Degree: Master of Applied Science, School of Engineering, 2013, University of Guelph
URL: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/7373
► A new hand training system has been designed and built to help clinicians administrate hand therapy to stroke patients. It uses pneumatics to actuate the…
(more)
▼ A new hand training system has been designed and built to help clinicians administrate hand therapy to stroke patients. It uses
pneumatics to actuate the fingers from the dorsal side of the hand in order to provide training for activities of daily living. Before the device is tested in a clinical trial, it’s safety, comfort and reliability needed to be established via trials on 30 healthy individuals. A comfort survey that was issued to the users indicated that they found the device comfortable regardless of age, gender, weight and hand length. The sensor data that was gathered during testing indicated that the readings were reliable and the device had minimal impact on the subjects' normal range of motion. A bio-mechanical model, validated through experimentation, was also created to estimate joint angles of the index finger during the trials to ensure that the device put the joints of the finger in bio-mechanically safe angles.
Advisors/Committee Members: Abdullah, Hussein A. (advisor).
Subjects/Keywords: Robotics; Pneumatics; Robotic Rehabilitation; Therapeutic Devices
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APA (6th Edition):
Jackson, G. (2013). Development of a Pneumatic Hand Training Device for Stroke Rehabilitation. (Masters Thesis). University of Guelph. Retrieved from https://atrium.lib.uoguelph.ca/xmlui/handle/10214/7373
Chicago Manual of Style (16th Edition):
Jackson, Gregory. “Development of a Pneumatic Hand Training Device for Stroke Rehabilitation.” 2013. Masters Thesis, University of Guelph. Accessed April 15, 2021.
https://atrium.lib.uoguelph.ca/xmlui/handle/10214/7373.
MLA Handbook (7th Edition):
Jackson, Gregory. “Development of a Pneumatic Hand Training Device for Stroke Rehabilitation.” 2013. Web. 15 Apr 2021.
Vancouver:
Jackson G. Development of a Pneumatic Hand Training Device for Stroke Rehabilitation. [Internet] [Masters thesis]. University of Guelph; 2013. [cited 2021 Apr 15].
Available from: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/7373.
Council of Science Editors:
Jackson G. Development of a Pneumatic Hand Training Device for Stroke Rehabilitation. [Masters Thesis]. University of Guelph; 2013. Available from: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/7373
Delft University of Technology
6.
Snieder, Jelle (author).
Development of an Air-Based Contactless Transport Demonstrator.
Degree: 2017, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:870adc6e-2f78-468c-a6c2-079eaec49226
► In many industries, for example the semi-conductor and solar cell industry, production processes have to handle thin substrates such as wafers or solar cells. For…
(more)
▼ In many industries, for example the semi-conductor and solar cell industry, production processes have to handle thin substrates such as wafers or solar cells. For economic reasons, the thickness of these substrates shows a decreasing trend over the years. This results in an increasing breakage rate of the substrates during the production process. A solution to this problem could be air-based contactless handling. A thin film of air is used to perform a levitation and propulsion function. The levitation is similar to conventional air bearing technology, while the propulsion is achieved by exploiting the viscous traction force of a thin film of air. The state of the art in contactless positioning using a thin film of air is mainly focused on the positioning of the substrate. The next step in thin substrate handling is transporting them. In this project, a transport demonstrator for handling a 100 mm diameter wafer is designed and fabricated. This is done in a layer approached way, for which new manufacturing methods are developed. The demonstrator consists of an active surface and a passive surface. The active air bearing surface is able to actuate and levitate the wafer in two degrees of freedom, while the passive air bearing surface is only able to levitate the wafer and guide its motion. Crucial in the combination of the two different surfaces is a smooth transition of the wafer. This is realised by matching the wafer fly height and the air film stiffness of each surface. A smooth transition of the wafer between the active surface and the passive surface is observed. Therefore, the demonstrator is a promising concept to realise an air-based contactless conveying line for thin substrates.
Advisors/Committee Members: van Ostayen, Ron (mentor), Delft University of Technology (degree granting institution).
Subjects/Keywords: Contactless; Air bearing; Substrates; Transport; Pneumatics; Demonstrator
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APA (6th Edition):
Snieder, J. (. (2017). Development of an Air-Based Contactless Transport Demonstrator. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:870adc6e-2f78-468c-a6c2-079eaec49226
Chicago Manual of Style (16th Edition):
Snieder, Jelle (author). “Development of an Air-Based Contactless Transport Demonstrator.” 2017. Masters Thesis, Delft University of Technology. Accessed April 15, 2021.
http://resolver.tudelft.nl/uuid:870adc6e-2f78-468c-a6c2-079eaec49226.
MLA Handbook (7th Edition):
Snieder, Jelle (author). “Development of an Air-Based Contactless Transport Demonstrator.” 2017. Web. 15 Apr 2021.
Vancouver:
Snieder J(. Development of an Air-Based Contactless Transport Demonstrator. [Internet] [Masters thesis]. Delft University of Technology; 2017. [cited 2021 Apr 15].
Available from: http://resolver.tudelft.nl/uuid:870adc6e-2f78-468c-a6c2-079eaec49226.
Council of Science Editors:
Snieder J(. Development of an Air-Based Contactless Transport Demonstrator. [Masters Thesis]. Delft University of Technology; 2017. Available from: http://resolver.tudelft.nl/uuid:870adc6e-2f78-468c-a6c2-079eaec49226
University of Ontario Institute of Technology
7.
Levins, Matthew D.
Design and development of a novel anthropomorphic finger with pneumatic tactile sensing.
Degree: 2020, University of Ontario Institute of Technology
URL: http://hdl.handle.net/10155/1172
► The human hand is a tool that we rely on to conduct a vast variety of tasks, from cracking eggs to lifting boxes. Meanwhile, in…
(more)
▼ The human hand is a tool that we rely on to conduct a vast variety of tasks, from cracking eggs to lifting boxes. Meanwhile, in an industrial setting, different tools are needed to complete specific tasks. Picking up a box may require parallel grippers, while grabbing an egg may need suction cups. Having one tool to accomplish both jobs saves time and money for tooling changes when a new product is manufactured. Hence, the need for anthropomorphic (human-like) grippers has risen over time.
This work outlines the creation of an anthropomorphic finger and pneumatic tactile sensor. This underactuated and compliant finger design is optimal for an industrial or collaborative environment, while the pneumatic sensor is proven to be sensitive and accurate for tactile feedback of grasped objects. This feedback consists of force measurement and slip detection, which is required for efficient object manipulation.
Advisors/Committee Members: Lang, Haoxiang.
Subjects/Keywords: Robotics; Tactile sensors; Pneumatics; Collaborative; Machine learning
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APA (6th Edition):
Levins, M. D. (2020). Design and development of a novel anthropomorphic finger with pneumatic tactile sensing. (Thesis). University of Ontario Institute of Technology. Retrieved from http://hdl.handle.net/10155/1172
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Levins, Matthew D. “Design and development of a novel anthropomorphic finger with pneumatic tactile sensing.” 2020. Thesis, University of Ontario Institute of Technology. Accessed April 15, 2021.
http://hdl.handle.net/10155/1172.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Levins, Matthew D. “Design and development of a novel anthropomorphic finger with pneumatic tactile sensing.” 2020. Web. 15 Apr 2021.
Vancouver:
Levins MD. Design and development of a novel anthropomorphic finger with pneumatic tactile sensing. [Internet] [Thesis]. University of Ontario Institute of Technology; 2020. [cited 2021 Apr 15].
Available from: http://hdl.handle.net/10155/1172.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Levins MD. Design and development of a novel anthropomorphic finger with pneumatic tactile sensing. [Thesis]. University of Ontario Institute of Technology; 2020. Available from: http://hdl.handle.net/10155/1172
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Vanderbilt University
8.
Wait, Keith Wesley.
The Use of Pneumatic Actuation to Address Shortcomings Concerning Normalized Output Power in State of the Art Mobile Robotics.
Degree: PhD, Mechanical Engineering, 2010, Vanderbilt University
URL: http://hdl.handle.net/1803/13608
► It is well known in the field of engineering that pneumatic actuation has certain advantages over electromagnetic actuation, although the latter is far more commonly…
(more)
▼ It is well known in the field of engineering that pneumatic actuation has certain advantages over electromagnetic actuation, although the latter is far more commonly fielded in both mobile and stationary devices. The aim of this project is, then, to demonstrate that using pneumatic actuation in a mobile walking robot is not only feasible, but that the benefits of the actuation type chosen are propagated to the system as a whole. In this dissertation, the state-of-the-art in mobile walking robots is thoroughly explored and compared through the use of the normalized power metrics speed (in robot body lengths per second) and payload capacity (as a percentage of the robot's body mass). The design process leading up to a pneumatically actuated quadrupedal walking robot is documented including the mechanical design of the robot's structure, the evaluation and characterization of miniature pneumatic control valves, and the development of sophisticated electronics to control operation of the robot. Additionally, a mode of position control for pneumatic actuators is studied and demonstrated to enable robust and authoritative operation of the robot's joint actuators. Finally, the robot is deployed and shown to traverse a number of different substrates and its maximum normalized power metrics are measured and compared with the state-of-the-art. These measurements show that the use of pneumatic actuation is justified as the robot exceeds almost all previously built walking devices in this measure.
Advisors/Committee Members: Eric J. Barth (committee member), Robert J. Roselli (committee member), Nilanjan Sarkar (committee member), Robert J. Webster III (committee member), Michael Goldfarb (Committee Chair).
Subjects/Keywords: pneumatics; walking robot; mobile robotics
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APA (6th Edition):
Wait, K. W. (2010). The Use of Pneumatic Actuation to Address Shortcomings Concerning Normalized Output Power in State of the Art Mobile Robotics. (Doctoral Dissertation). Vanderbilt University. Retrieved from http://hdl.handle.net/1803/13608
Chicago Manual of Style (16th Edition):
Wait, Keith Wesley. “The Use of Pneumatic Actuation to Address Shortcomings Concerning Normalized Output Power in State of the Art Mobile Robotics.” 2010. Doctoral Dissertation, Vanderbilt University. Accessed April 15, 2021.
http://hdl.handle.net/1803/13608.
MLA Handbook (7th Edition):
Wait, Keith Wesley. “The Use of Pneumatic Actuation to Address Shortcomings Concerning Normalized Output Power in State of the Art Mobile Robotics.” 2010. Web. 15 Apr 2021.
Vancouver:
Wait KW. The Use of Pneumatic Actuation to Address Shortcomings Concerning Normalized Output Power in State of the Art Mobile Robotics. [Internet] [Doctoral dissertation]. Vanderbilt University; 2010. [cited 2021 Apr 15].
Available from: http://hdl.handle.net/1803/13608.
Council of Science Editors:
Wait KW. The Use of Pneumatic Actuation to Address Shortcomings Concerning Normalized Output Power in State of the Art Mobile Robotics. [Doctoral Dissertation]. Vanderbilt University; 2010. Available from: http://hdl.handle.net/1803/13608
Georgia Tech
9.
Henderson, Gregory Clark.
Pneumatically-powered robotic exoskeleton to exercise specific lower extremity muscle groups in humans.
Degree: MS, Mechanical Engineering, 2012, Georgia Tech
URL: http://hdl.handle.net/1853/47624
► A control method is proposed for exercising specific muscles of a human's lower body. This is accomplished using an exoskeleton that imposes active force feedback…
(more)
▼ A control method is proposed for exercising specific muscles of a human's lower body. This is accomplished using an exoskeleton that imposes active force feedback control. The proposed method involves a combined dynamic model of the musculoskeletal system of the lower-body with the dynamics of pneumatic actuators. The exoskeleton is designed to allow for individual control of mono-articular or bi-articular muscles to be exercised while not inhibiting the
subject's range of motion.
The control method has been implemented in a 1-Degree of Freedom (DOF) exoskeleton that is designed to resist the motion of the human knee by applying actuator forces in opposition to a specified muscle force profile. In this research, there is a discussion on the model of the human's lower body and how muscles are affected as a function of joint positions. Then it is discussed how to calculate for the forces needed by a pneumatic actuator to oppose the muscles to create the desired muscle force profile at a given joint angles. The proposed exoskeleton could be utilized either for rehabilitation purposes, to prevent muscle atrophy and bone loss of astronauts, or for muscle training in general.
Advisors/Committee Members: Ueda, Jun (Committee Chair), Book, Wayne (Committee Member), Shinohara, Minoru (Committee Member).
Subjects/Keywords: Robotic exoskeleton; Muscle control; Pneumatics; Resistive; Robotic exoskeletons; Physical therapy
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APA (6th Edition):
Henderson, G. C. (2012). Pneumatically-powered robotic exoskeleton to exercise specific lower extremity muscle groups in humans. (Masters Thesis). Georgia Tech. Retrieved from http://hdl.handle.net/1853/47624
Chicago Manual of Style (16th Edition):
Henderson, Gregory Clark. “Pneumatically-powered robotic exoskeleton to exercise specific lower extremity muscle groups in humans.” 2012. Masters Thesis, Georgia Tech. Accessed April 15, 2021.
http://hdl.handle.net/1853/47624.
MLA Handbook (7th Edition):
Henderson, Gregory Clark. “Pneumatically-powered robotic exoskeleton to exercise specific lower extremity muscle groups in humans.” 2012. Web. 15 Apr 2021.
Vancouver:
Henderson GC. Pneumatically-powered robotic exoskeleton to exercise specific lower extremity muscle groups in humans. [Internet] [Masters thesis]. Georgia Tech; 2012. [cited 2021 Apr 15].
Available from: http://hdl.handle.net/1853/47624.
Council of Science Editors:
Henderson GC. Pneumatically-powered robotic exoskeleton to exercise specific lower extremity muscle groups in humans. [Masters Thesis]. Georgia Tech; 2012. Available from: http://hdl.handle.net/1853/47624
Vanderbilt University
10.
Cummins, Joshua Joseph.
Characterization of a Pneumatic Strain Energy Accumulator: Efficiency and First Principles Models with Uncertainty Analysis.
Degree: PhD, Mechanical Engineering, 2016, Vanderbilt University
URL: http://hdl.handle.net/1803/11159
► Several technical needs were identified and addressed for advancing the Strain Energy Accumulator (SEA), which is an energy storage device consisting of an expandable rubber…
(more)
▼ Several technical needs were identified and addressed for advancing the Strain Energy Accumulator (SEA), which is an energy storage device consisting of an expandable rubber bladder inside of a rigid shroud that stores energy in the form of pressure and strain. First, multiscale modeling methods were investigated to estimate the homogenized elastic modulus of carbon nanotube (CNT) rubber. The result is homogenized modulus estimates ranging from a few times to almost 80 times the elastic modulus of rubber, indicating the need for validation of existing models or development of new models to estimate the modulus for matrix and inclusion materials having drastically dissimilar moduli. Second, an analytical methodology was developed for simultaneously characterizing the energy storage in pneumatic and strain energy systems including component efficiency. By incorporating uncertainty analysis, the efficiencies of the strain energy accumulator are measured in over 2500 cycles of testing to be consistently over 93 %.
Third, system state efficiency models were developed and expanded. Through experimentation, the model was determined to be favorably conservative with system efficiency projections ranging from 31 % to over 60 % depending on the system configuration. In addition, materials challenges in high pressure applications led to the conceptual investigation of CNT elastomers offering improved material strength properties and the potential for self-sensing. In previous research, carbon nanotube sensor thread was tested as a distributed sensor on carbon fiber reinforced composites and was able to monitor strain and detect damage in composite panels. The use of nanomaterials for self-sensing was extended in the current work with proof of concept tests performed on electrically conductive elastomers that exhibited the ability to monitor load and detect damage in specific directions.
Each of these contributions in the areas of materials modeling, uncertainty analysis, and component and system efficiency quantification techniques has helped to advance the Strain Energy Accumulator technology.
Advisors/Committee Members: Eric J Barth (committee member), Sankaran Mahadevan (committee member), Thomas J Withrow (committee member), Florence Sanchez (committee member), Douglas E Adams (Committee Chair).
Subjects/Keywords: Efficiency; Modeling; Strain Energy; Pneumatics; Conductive Elastomers; Load and Damage Monitoring
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APA (6th Edition):
Cummins, J. J. (2016). Characterization of a Pneumatic Strain Energy Accumulator: Efficiency and First Principles Models with Uncertainty Analysis. (Doctoral Dissertation). Vanderbilt University. Retrieved from http://hdl.handle.net/1803/11159
Chicago Manual of Style (16th Edition):
Cummins, Joshua Joseph. “Characterization of a Pneumatic Strain Energy Accumulator: Efficiency and First Principles Models with Uncertainty Analysis.” 2016. Doctoral Dissertation, Vanderbilt University. Accessed April 15, 2021.
http://hdl.handle.net/1803/11159.
MLA Handbook (7th Edition):
Cummins, Joshua Joseph. “Characterization of a Pneumatic Strain Energy Accumulator: Efficiency and First Principles Models with Uncertainty Analysis.” 2016. Web. 15 Apr 2021.
Vancouver:
Cummins JJ. Characterization of a Pneumatic Strain Energy Accumulator: Efficiency and First Principles Models with Uncertainty Analysis. [Internet] [Doctoral dissertation]. Vanderbilt University; 2016. [cited 2021 Apr 15].
Available from: http://hdl.handle.net/1803/11159.
Council of Science Editors:
Cummins JJ. Characterization of a Pneumatic Strain Energy Accumulator: Efficiency and First Principles Models with Uncertainty Analysis. [Doctoral Dissertation]. Vanderbilt University; 2016. Available from: http://hdl.handle.net/1803/11159
Delft University of Technology
11.
Hoek, A.L. (author).
On the design of a hybrid actuated hand prosthesis.
Degree: 2020, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:9321a824-6086-4d2d-ab5d-bffccd93eaf4
► Hand prostheses commonly advertise on three main selling points: strength, speed and lightweight. Most conventional hand prostheses are only able to combine two of these…
(more)
▼ Hand prostheses commonly advertise on three main selling points: strength, speed and lightweight. Most conventional hand prostheses are only able to combine two of these three attributes. Therefore, combining all three attributes into a single device can result in a commercially attractive hand prosthesis. Another interesting point, particularly for pneumatic prostheses, is the usage time, as historically many have run into problems here and an extended usage time makes it attractive to the user. The goal of this graduation research is, therefore, to design a pneumatically powered hand prosthesis, that combines a high grip strength, a high opening/closing speed and lightweight into a single device, whilst maintaining a reasonable usage time. A hybrid actuated hand prosthesis is designed that combines a finger design based upon the Delft Cylinder Hand, with dual-mode actuation. This dual-mode actuation increases the efficiency of the hand and consist of a CO
2 supply with a hydraulic transmission to the fingers. A final prototype of the dual-mode actuation transmission is fabricated and evaluated. Although there is room for improvement in the resistance and timing of the system, the hand has a relatively high pinch force of an estimated 56 N. Furthermore, a grip speed of less than a second makes the hand attractive to be used. With a mass of only 235 grams, the hand weighs less than most of its competitors and is comfortable in use. The dual-mode actuation significantly increases the efficiency of the hand and gives it a usage time of over 400 cycles.
Advisors/Committee Members: Plettenburg, D.H. (mentor), van der Helm, F.C.T. (graduation committee), Horeman, T. (graduation committee), Delft University of Technology (degree granting institution).
Subjects/Keywords: Prosthesis; Prosthesis design; Hand; Finger; Pneumatics; Hydraulic cylinder; Delft Cylinder Hand
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APA (6th Edition):
Hoek, A. L. (. (2020). On the design of a hybrid actuated hand prosthesis. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:9321a824-6086-4d2d-ab5d-bffccd93eaf4
Chicago Manual of Style (16th Edition):
Hoek, A L (author). “On the design of a hybrid actuated hand prosthesis.” 2020. Masters Thesis, Delft University of Technology. Accessed April 15, 2021.
http://resolver.tudelft.nl/uuid:9321a824-6086-4d2d-ab5d-bffccd93eaf4.
MLA Handbook (7th Edition):
Hoek, A L (author). “On the design of a hybrid actuated hand prosthesis.” 2020. Web. 15 Apr 2021.
Vancouver:
Hoek AL(. On the design of a hybrid actuated hand prosthesis. [Internet] [Masters thesis]. Delft University of Technology; 2020. [cited 2021 Apr 15].
Available from: http://resolver.tudelft.nl/uuid:9321a824-6086-4d2d-ab5d-bffccd93eaf4.
Council of Science Editors:
Hoek AL(. On the design of a hybrid actuated hand prosthesis. [Masters Thesis]. Delft University of Technology; 2020. Available from: http://resolver.tudelft.nl/uuid:9321a824-6086-4d2d-ab5d-bffccd93eaf4
Vanderbilt University
12.
Gibson, Tyler J.
Exhaust Gas Energy Reclamation With a Pneumatic Boost Converter.
Degree: MS, Mechanical Engineering, 2017, Vanderbilt University
URL: http://hdl.handle.net/1803/13348
► This thesis presents the design and dynamic model for a prototype pneumatic boost converter, a device developed to be an energetic equivalent to the electrical…
(more)
▼ This thesis presents the design and dynamic model for a prototype pneumatic boost converter, a device developed to be an energetic equivalent to the electrical boost converter. The design of the system selects pneumatic components that are energetically equivalent to the components used in the analogous system in the electrical domain. A dynamic model for the pneumatic boost converter that describes the rapidly fluctuating pressures and volumes is developed. Movement within the system and mass flow through orifices connecting control volumes are also modeled. A prototype was developed to reclaim air at 653 kPa (80 psig) and experimental data was collected at two points within the system. This experimental data is used to validate the dynamic model by comparing experimental and simulated pressures. The experimental data is also used to calculate the total energy reclaimed by the pneumatic boost converter as well as the system efficiency.
Advisors/Committee Members: Kenneth Frampton (committee member), Michael Goldfarb (committee member), Eric J. Barth (Committee Chair).
Subjects/Keywords: energy reclamation; industrial applications; fluid power; mechanical design; dynamic modeling; pneumatics; experimental validation
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Chicago ·
MLA ·
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Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Gibson, T. J. (2017). Exhaust Gas Energy Reclamation With a Pneumatic Boost Converter. (Thesis). Vanderbilt University. Retrieved from http://hdl.handle.net/1803/13348
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Gibson, Tyler J. “Exhaust Gas Energy Reclamation With a Pneumatic Boost Converter.” 2017. Thesis, Vanderbilt University. Accessed April 15, 2021.
http://hdl.handle.net/1803/13348.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Gibson, Tyler J. “Exhaust Gas Energy Reclamation With a Pneumatic Boost Converter.” 2017. Web. 15 Apr 2021.
Vancouver:
Gibson TJ. Exhaust Gas Energy Reclamation With a Pneumatic Boost Converter. [Internet] [Thesis]. Vanderbilt University; 2017. [cited 2021 Apr 15].
Available from: http://hdl.handle.net/1803/13348.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Gibson TJ. Exhaust Gas Energy Reclamation With a Pneumatic Boost Converter. [Thesis]. Vanderbilt University; 2017. Available from: http://hdl.handle.net/1803/13348
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
13.
Battiston, Geoffray.
Amélioration des performances du régulateur des masques à oxygène : Performance improvement of the pilot's oxygen mask regulator.
Degree: Docteur es, Automatique, 2019, Université Paris-Saclay (ComUE)
URL: http://www.theses.fr/2019SACLC039
► Il s’agit ici d’étudier un phénomène vibratoire ressenti par les utilisateurs d’un masque à oxygène au niveau de la fosse nasale. Le masque à oxygène…
(more)
▼ Il s’agit ici d’étudier un phénomène vibratoire ressenti par les utilisateurs d’un masque à oxygène au niveau de la fosse nasale. Le masque à oxygène intègre un régulateur qui envoie de l’oxygène en réponse à une demande de débit. Les vibrations prennent la forme de variations de pression à l’entrée du masque et leur origine est inconnue. Parmi les objectifs du travail de thèse, on essaiera de comprendre l’origine et de caractériser ce phénomène après une modélisation détaillée du régulateur, prenant en compte assez finement sa géométrie. Dans un deuxième temps, la stabilisation de la trajectoire dynamique de ce système sera étudiée par le biais de l’application du critère de Routh à un modèle linéarisé autour d’un point d’équilibre. Dans un troisième temps, quelques phénomènes dynamiques et physiques additionnels seront investis afin de pousser plus en avant la compréhension du fonctionnement du masque. Dans un quatrième temps et en guise d’ouverture, on prendra le temps d’évoquer des pistes supplémentaires pour l’étude de ce système.
The vibratory behavior of a regulated oxygen mask is studied here. The oxygen mask integrates a regulator which sends oxygen in response to a demand flow. The vibrations take the form of pressure variations in the mask volume, at the entry of the nasal ways, and their origin is unknown. Among the goals of this thesis work, we will try first to understand the origin and to characterize this phenomenon after a detailed modeling of the regulator, taking accurately into account its geometry. Second, the stabilization of the system’s dynamical trajectory will be studied by applying the Routh criterion to a linearized model around an equilibrium point. Third, some additional dynamical and physical phenomena will be investigated in order to push forward the understanding of the mask functionning. Fourth, and as an opening, time will be taken to mention supplementary tracks for the study of this system.
Advisors/Committee Members: Duc, Gilles (thesis director).
Subjects/Keywords: Modélisation; Pneumatique; Système non-linéaire; Analyse de stabilité; Modeling; Pneumatics; Nonlinear systems; Stability analysis
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APA ·
Chicago ·
MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Battiston, G. (2019). Amélioration des performances du régulateur des masques à oxygène : Performance improvement of the pilot's oxygen mask regulator. (Doctoral Dissertation). Université Paris-Saclay (ComUE). Retrieved from http://www.theses.fr/2019SACLC039
Chicago Manual of Style (16th Edition):
Battiston, Geoffray. “Amélioration des performances du régulateur des masques à oxygène : Performance improvement of the pilot's oxygen mask regulator.” 2019. Doctoral Dissertation, Université Paris-Saclay (ComUE). Accessed April 15, 2021.
http://www.theses.fr/2019SACLC039.
MLA Handbook (7th Edition):
Battiston, Geoffray. “Amélioration des performances du régulateur des masques à oxygène : Performance improvement of the pilot's oxygen mask regulator.” 2019. Web. 15 Apr 2021.
Vancouver:
Battiston G. Amélioration des performances du régulateur des masques à oxygène : Performance improvement of the pilot's oxygen mask regulator. [Internet] [Doctoral dissertation]. Université Paris-Saclay (ComUE); 2019. [cited 2021 Apr 15].
Available from: http://www.theses.fr/2019SACLC039.
Council of Science Editors:
Battiston G. Amélioration des performances du régulateur des masques à oxygène : Performance improvement of the pilot's oxygen mask regulator. [Doctoral Dissertation]. Université Paris-Saclay (ComUE); 2019. Available from: http://www.theses.fr/2019SACLC039
University of Pretoria
14.
[No author].
Development of a vibration absorbing handle for rock
drills
.
Degree: 2007, University of Pretoria
URL: http://upetd.up.ac.za/thesis/available/etd-01122007-164554/
► Excessive vibration exerted on the human body can cause many harmful phenomena that can result in permanent bodily damage or permanent disability. Human vibration is…
(more)
▼ Excessive vibration exerted on the human body can
cause many harmful phenomena that can result in permanent bodily
damage or permanent disability. Human vibration is classified into
two main categories: Hand,arm vibration and whole,body vibration.
Hand,arm vibration is vibration transmitted through a percussive
tool handle via the hand,arm system to the rest of the body. The
main diseases concerning hand,arm vibration are Vibration White
Finger (VWF), neurological diseases in the hand and fingers and
musculoskeletal diseases like carpal tunnel syndrome. These
diseases, especially VWF and musculoskeletal disorders, are mainly
associated with lower frequencies. VWF in particular is more likely
to occur when an operator is subjected to vibrations with high
magnitudes in the 25-40 Hz region. The operating frequencies of
most rock drills vary between 30 and 50 Hz. Although there are many
other contributing factors like grip force, hand temperature and
subject variability, prevalence of VWF among rock drill operators
is relatively high in the world. The situation in South Africa is
not yet very clear, and further research must be done to evaluate
the current status of VWF in South Africa. Vibration energy at
higher frequencies can be attenuated with rubber grips or gloves,
and these types of dampers are already available on the market. The
problem concerning the operating frequency of the drill has not yet
been successfully addressed, and thus remains a problem in the rock
drill industry as it is at the moment. The main objective of this
thesis was the development and testing of a concept that can
potentially be implemented on a rock drill to attenuate the
operating frequency of a rock drill. The concept must be able to
account for minor changes in operating frequency on a specific
drill. In addition to that, the drill operating frequency varies
from one drill to another. The thesis also aims to lay the
mathematical foundation to design an attenuating handle for a
specific drill with a specific operating frequency. All the
objectives must be obtained without noticeable sacrifices in drill
control or performance. The thesis includes the concept generation,
optimisation, design and manufacture of a rock drill vibration
absorber. The absorber has been tested, and the results are
presented.
Advisors/Committee Members: Prof P S Heyns (advisor), Prof J C van Niekerk (advisor).
Subjects/Keywords: Pneumatics technology;
Drilling and boring machinery;
UCTD
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
author], [. (2007). Development of a vibration absorbing handle for rock
drills
. (Masters Thesis). University of Pretoria. Retrieved from http://upetd.up.ac.za/thesis/available/etd-01122007-164554/
Chicago Manual of Style (16th Edition):
author], [No. “Development of a vibration absorbing handle for rock
drills
.” 2007. Masters Thesis, University of Pretoria. Accessed April 15, 2021.
http://upetd.up.ac.za/thesis/available/etd-01122007-164554/.
MLA Handbook (7th Edition):
author], [No. “Development of a vibration absorbing handle for rock
drills
.” 2007. Web. 15 Apr 2021.
Vancouver:
author] [. Development of a vibration absorbing handle for rock
drills
. [Internet] [Masters thesis]. University of Pretoria; 2007. [cited 2021 Apr 15].
Available from: http://upetd.up.ac.za/thesis/available/etd-01122007-164554/.
Council of Science Editors:
author] [. Development of a vibration absorbing handle for rock
drills
. [Masters Thesis]. University of Pretoria; 2007. Available from: http://upetd.up.ac.za/thesis/available/etd-01122007-164554/
University of Pretoria
15.
Strydom, Johannes Petrus De
Wet.
Development of a
vibration absorbing handle for rock drills.
Degree: Mechanical and Aeronautical
Engineering, 2007, University of Pretoria
URL: http://hdl.handle.net/2263/23064
► Excessive vibration exerted on the human body can cause many harmful phenomena that can result in permanent bodily damage or permanent disability. Human vibration is…
(more)
▼ Excessive vibration exerted on the human body can cause
many harmful phenomena that can result in permanent bodily damage
or permanent disability. Human vibration is classified into two
main categories: Hand,arm vibration and whole,body vibration.
Hand,arm vibration is vibration transmitted through a percussive
tool handle via the hand,arm system to the rest of the body. The
main diseases concerning hand,arm vibration are Vibration White
Finger (VWF), neurological diseases in the hand and fingers and
musculoskeletal diseases like carpal tunnel syndrome. These
diseases, especially VWF and musculoskeletal disorders, are mainly
associated with lower frequencies. VWF in particular is more likely
to occur when an operator is subjected to vibrations with high
magnitudes in the 25-40 Hz region. The operating frequencies of
most rock drills vary between 30 and 50 Hz. Although there are many
other contributing factors like grip force, hand temperature and
subject variability, prevalence of VWF among rock drill operators
is relatively high in the world. The situation in South Africa is
not yet very clear, and further research must be done to evaluate
the current status of VWF in South Africa. Vibration energy at
higher frequencies can be attenuated with rubber grips or gloves,
and these types of dampers are already available on the market. The
problem concerning the operating frequency of the drill has not yet
been successfully addressed, and thus remains a problem in the rock
drill industry as it is at the moment. The main objective of this
thesis was the development and testing of a concept that can
potentially be implemented on a rock drill to attenuate the
operating frequency of a rock drill. The concept must be able to
account for minor changes in operating frequency on a specific
drill. In addition to that, the drill operating frequency varies
from one drill to another. The thesis also aims to lay the
mathematical foundation to design an attenuating handle for a
specific drill with a specific operating frequency. All the
objectives must be obtained without noticeable sacrifices in drill
control or performance. The thesis includes the concept generation,
optimisation, design and manufacture of a rock drill vibration
absorber. The absorber has been tested, and the results are
presented.
Advisors/Committee Members: Prof P S Heyns (advisor), Prof J C van Niekerk (coadvisor).
Subjects/Keywords: Pneumatics
technology; Drilling and
boring machinery;
UCTD
Record Details
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Strydom, J. P. D. (2007). Development of a
vibration absorbing handle for rock drills. (Masters Thesis). University of Pretoria. Retrieved from http://hdl.handle.net/2263/23064
Chicago Manual of Style (16th Edition):
Strydom, Johannes Petrus De. “Development of a
vibration absorbing handle for rock drills.” 2007. Masters Thesis, University of Pretoria. Accessed April 15, 2021.
http://hdl.handle.net/2263/23064.
MLA Handbook (7th Edition):
Strydom, Johannes Petrus De. “Development of a
vibration absorbing handle for rock drills.” 2007. Web. 15 Apr 2021.
Vancouver:
Strydom JPD. Development of a
vibration absorbing handle for rock drills. [Internet] [Masters thesis]. University of Pretoria; 2007. [cited 2021 Apr 15].
Available from: http://hdl.handle.net/2263/23064.
Council of Science Editors:
Strydom JPD. Development of a
vibration absorbing handle for rock drills. [Masters Thesis]. University of Pretoria; 2007. Available from: http://hdl.handle.net/2263/23064
New Jersey Institute of Technology
16.
King, Trevor Compton.
Mechanism of pneumatic fracturing.
Degree: MSin Environmental Engineering - (M.S.), Civil and Environmental Engineering, 1993, New Jersey Institute of Technology
URL: https://digitalcommons.njit.edu/theses/1258
► This thesis investigates the mechanism of pneumatic fracturing in geologic materials such as soil and rock. Pneumatic fracturing is a recently developed technique for…
(more)
▼ This thesis investigates the mechanism of pneumatic fracturing in geologic materials such as soil and rock. Pneumatic fracturing is a recently developed technique for increasing the permeability of geologic formations by the controlled injection of high pressure air. Present applications are focusing on the in situ remediation of contaminated soil and ground water, although pneumatic fracturing has other geotechnical uses such as pumping well enhancement.
A comprehensive literature review of a related technology known as hydraulic fracturing is presented, which serves as background for development of a pneumatic fracturing model. Pressure-time histories from actual pneumatic injections are analyzed in detail to understand the failure mechanism. Several distinct stages of a typical fracture event are identified including: fracture initiation, fracture extension, fracture maintenance, and fracture residual. Reinjection behavior of previously fractured formations is also investigated. The entire fracture event was consistently found to be quite rapid, lasting only several seconds, leading to the conclusion that the formations will respond brittlely.
Based on these pressure-time analyses, an original analytical model is developed for the prediction of fracture initiation pressure and fracture maintenance pressure. The model describes the stress conditions leading to failure in and around a discrete section of borehole during pneumatic injection. The model has a linear form, and assumes the geologic medium is brittle-elastic, uniformly stratified, overconsolidated, horizontally isotropic, and semi-porous. The two dominant terms found to influence fracture pressure are overburden stress and apparent tensile strength of the formation. The effects of pieozometric head are also incorporated, so that the model is applicable to both the vadose zone and saturated zone.
Validation of the model is made with actual field data from several different research test sites. The trends of the data show reasonable agreement with the model, and numerical coefficients are determined by regression. Tentative relationships were developed for two types of geologic media: clayey silt and siltstone/sandstone. Overburden gradients for the clayey silt, siltstone and sandstone ranged from 1.0 to 2.5 psi per foot of depth. Apparent cohesive/tensile strengths for these materials ranged from 5 to 23 psi, 41 to 130 psi and 42 to 52 psi respectively. Sample computations with the model are presented, and the thesis concludes with recommendations for future study.
Advisors/Committee Members: John R. Schuring, Paul C. Chan, Dorairaja Raghu.
Subjects/Keywords: Soil mechanics.; Rock mechanics.; Pneumatics.; Fracture mechanics.; Environmental Engineering
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MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
King, T. C. (1993). Mechanism of pneumatic fracturing. (Thesis). New Jersey Institute of Technology. Retrieved from https://digitalcommons.njit.edu/theses/1258
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
King, Trevor Compton. “Mechanism of pneumatic fracturing.” 1993. Thesis, New Jersey Institute of Technology. Accessed April 15, 2021.
https://digitalcommons.njit.edu/theses/1258.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
King, Trevor Compton. “Mechanism of pneumatic fracturing.” 1993. Web. 15 Apr 2021.
Vancouver:
King TC. Mechanism of pneumatic fracturing. [Internet] [Thesis]. New Jersey Institute of Technology; 1993. [cited 2021 Apr 15].
Available from: https://digitalcommons.njit.edu/theses/1258.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
King TC. Mechanism of pneumatic fracturing. [Thesis]. New Jersey Institute of Technology; 1993. Available from: https://digitalcommons.njit.edu/theses/1258
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Uppsala University
17.
Eriksson, Axel.
Detecting Leakages in the PneumaticSystem of Heavy Vehicles : Modelling Using Simulink.
Degree: Division of Systems and Control, 2010, Uppsala University
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-136451
► In this thesis an algorithm for detecting leakages in the pneumatic system of heavy vehicles is developed. Besides a description of this algorithm, the…
(more)
▼ In this thesis an algorithm for detecting leakages in
the pneumatic system of heavy vehicles is
developed. Besides a description of this algorithm,
the thesis includes a description of the pneumatic
system of heavy vehicles, a review of some basic
statistics and change detection analysis, and a
description and analysis of some validation tests.
Heavy vehicles use compressed air for various
applications, including brakes and suspensions.
Leakages in the pneumatic system are quite
common and results in an increase in fuel usage,
since more compressed air has to be produced.
This is of course both environmentally and
economically damaging. In order to avoid this
damage, leakages need to be fixed. The first step is
to notice the presence of leakages.
The leakage detecting algorithm is based on a
statistical deviation analysis. Inputs used are
pressure measurements from the different
compressed air circuits and some state variables
regarding the compressed air users. All this
information is communicated aboard on the
vehicles’ controller area network (CAN).
The algorithm has been validated using real data
measurements from test drives, some of them
including a vehicle suffering from leakages. The
results indicate that the algorithm manages to
identify leakages, but also that there are some
problems regarding incorrectly interpreting other
events as leakages. The results also indicate that
the algorithm fail in the ambition to locate the
leakages.
If this algorithm should be implemented in a real
time system to be used aboard, it is suggested that
some improvements are made. These improvements
mainly concern avoiding false alarms.
Subjects/Keywords: heavy vehicle; scania; pneumatics; Engineering physics; Teknisk fysik
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Eriksson, A. (2010). Detecting Leakages in the PneumaticSystem of Heavy Vehicles : Modelling Using Simulink. (Thesis). Uppsala University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-136451
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Eriksson, Axel. “Detecting Leakages in the PneumaticSystem of Heavy Vehicles : Modelling Using Simulink.” 2010. Thesis, Uppsala University. Accessed April 15, 2021.
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-136451.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Eriksson, Axel. “Detecting Leakages in the PneumaticSystem of Heavy Vehicles : Modelling Using Simulink.” 2010. Web. 15 Apr 2021.
Vancouver:
Eriksson A. Detecting Leakages in the PneumaticSystem of Heavy Vehicles : Modelling Using Simulink. [Internet] [Thesis]. Uppsala University; 2010. [cited 2021 Apr 15].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-136451.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Eriksson A. Detecting Leakages in the PneumaticSystem of Heavy Vehicles : Modelling Using Simulink. [Thesis]. Uppsala University; 2010. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-136451
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Iowa State University
18.
Bravo Palacios, Gabriel Fernando.
Design and simulation of a distortion masking control algorithm for a pneumatic cylinder.
Degree: 2015, Iowa State University
URL: https://lib.dr.iastate.edu/etd/14769
► Low energy efficiency is one of the main detractors of fluid power technology. To ensure the availability and sustainability of energy sources, fluid power technology…
(more)
▼ Low energy efficiency is one of the main detractors of fluid power technology. To ensure the availability and sustainability of energy sources, fluid power technology needs to meet high energy-efficiency and cost standards. This study aims to design, simulate and test a control algorithm that attenuates the detrimental effects of air compressibility on the performance and efficiency of a pneumatic cylinder.
The transmission of power over long distances makes it more difficult for fluid power technology to meet energy-efficiency and cost requirements. Transmitting power over long distances represents a challenge particularly for pneumatics due to the compressibility of air. The compressibility of air transmitted through lengthy tubing decreases the performance and efficiency of pneumatic actuators, mainly affecting their time response and velocity.
The system under analysis was composed of a pneumatic cylinder, two proportional control valves, and connective tubing. The dynamics of the individual components were characterized through experimentation. Nonlinear and linear models for the system were validated through the comparison of simulated and experimental data. The models predicted the system behavior more accurately at 2.5 Hz, when friction effects became negligible, as compared to 1.0 and 0.5 Hz.
A controller was designed using pole/zero cancellation, a control strategy able to mask undesirable dynamics of the system being controlled. Pole/zero cancellation had superior performance in the attenuation of air compressibility effects in comparison to proportional and proportional-derivative (PD) control. System performance and efficiency were assessed in terms of the variation of the length of tubing connecting the pneumatic cylinder and the control valves.
Pole/zero cancellation enabled the cylinder to achieve similar levels of performance for long (3.0 m) tubing as with short (0.55 m) tubing. With a 1.0-Hz sinusoidal input and equal control gains, pole/zero cancellation reduced the tracking error by approximately 30% and 23% in comparison to proportional and PD control, respectively. In terms of efficiency, with the system tracking a 2.5-Hz sinusoidal command, and using equal control gains, pole/zero cancellation increased the cylinder efficiency by approximately 36% and 54% in comparison to proportional and PD control, respectively. In general, pole/zero cancellation increased the system performance and efficiency in comparison to the other control schemes applied.
Subjects/Keywords: Mechanical Engineering; Control; Design; Energy Efficiency; Fluid Power; Pneumatics; Simulation; Agriculture; Bioresource and Agricultural Engineering; Mechanical Engineering; Robotics
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APA (6th Edition):
Bravo Palacios, G. F. (2015). Design and simulation of a distortion masking control algorithm for a pneumatic cylinder. (Thesis). Iowa State University. Retrieved from https://lib.dr.iastate.edu/etd/14769
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Bravo Palacios, Gabriel Fernando. “Design and simulation of a distortion masking control algorithm for a pneumatic cylinder.” 2015. Thesis, Iowa State University. Accessed April 15, 2021.
https://lib.dr.iastate.edu/etd/14769.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Bravo Palacios, Gabriel Fernando. “Design and simulation of a distortion masking control algorithm for a pneumatic cylinder.” 2015. Web. 15 Apr 2021.
Vancouver:
Bravo Palacios GF. Design and simulation of a distortion masking control algorithm for a pneumatic cylinder. [Internet] [Thesis]. Iowa State University; 2015. [cited 2021 Apr 15].
Available from: https://lib.dr.iastate.edu/etd/14769.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Bravo Palacios GF. Design and simulation of a distortion masking control algorithm for a pneumatic cylinder. [Thesis]. Iowa State University; 2015. Available from: https://lib.dr.iastate.edu/etd/14769
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Brno University of Technology
19.
Roun, Jiří.
Návrh řídicího systému pneumatického manipulátoru: Design of control system of pneumatic manipulator.
Degree: 2019, Brno University of Technology
URL: http://hdl.handle.net/11012/176748
► This bachelor thesis is about the design of the control system for the pneumatic manipulator. Initial research describe the current possibilities of pneumatic products for…
(more)
▼ This bachelor thesis is about the design of the control system for the pneumatic manipulator. Initial research describe the current possibilities of pneumatic products for driving and positioning of pneumatic assemblies. The practical part of this thesis describes the connection of hardware with PLC terminals and the design of software for controlling the manipulator. At the end of the thesis is testing part realized with designed software and measuring software.
Advisors/Committee Members: Vetiška, Jan (advisor), Bradáč, František (referee).
Subjects/Keywords: Pneumatické pohony; pneumatika; řízení; polohování; TwinCAT; PLC; automatizace; manipulátory; roboty; Pneumatic drives; pneumatics; control; positioning; TwinCAT; PLC; automation; manipulators; robots
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APA (6th Edition):
Roun, J. (2019). Návrh řídicího systému pneumatického manipulátoru: Design of control system of pneumatic manipulator. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/176748
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Roun, Jiří. “Návrh řídicího systému pneumatického manipulátoru: Design of control system of pneumatic manipulator.” 2019. Thesis, Brno University of Technology. Accessed April 15, 2021.
http://hdl.handle.net/11012/176748.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Roun, Jiří. “Návrh řídicího systému pneumatického manipulátoru: Design of control system of pneumatic manipulator.” 2019. Web. 15 Apr 2021.
Vancouver:
Roun J. Návrh řídicího systému pneumatického manipulátoru: Design of control system of pneumatic manipulator. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2021 Apr 15].
Available from: http://hdl.handle.net/11012/176748.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Roun J. Návrh řídicího systému pneumatického manipulátoru: Design of control system of pneumatic manipulator. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/176748
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
20.
Turkseven, Melih.
Design and control of a pneumatically driven MRI-compatible tele-operated haptic interface.
Degree: PhD, Mechanical Engineering, 2016, Georgia Tech
URL: http://hdl.handle.net/1853/55022
► This study presents methods for understanding, modeling and control of tele-operated pneumatic actuators for rehabilitation in Magnetic Resonance Imaging (MRI). Pneumatic actuators have excellent MRI-compatibility…
(more)
▼ This study presents methods for understanding, modeling and control of tele-operated pneumatic actuators for rehabilitation in Magnetic Resonance Imaging (MRI). Pneumatic actuators have excellent MRI-compatibility as opposed to conventional electro-mechanical systems; however, the actuator and the system drivers cannot be co-located due to the MRI-compatibility requirements. The actuators are driven via long transmission lines, which affect the system dynamics significantly. Methods provided in this work produced accurate pressure estimation and control by accounting for the pressure dynamics in the lines, which has been neglected by previous work in this area. The effectiveness of the presented modeling and control methods were demonstrated on tele-operation test setups. This research also includes the design of necessary system components for the developed algorithms. An MRI-compatible optical sensor was developed for force feedback and its design was analyzed for high precision. Directions and opportunities for future research are discussed.
Advisors/Committee Members: Ueda, Jun (advisor), Leamy, Michael (committee member), Sadegh, Nader (committee member), Zhang, Fumin (committee member), Howard, Ayanna (committee member).
Subjects/Keywords: Pneumatics; Observer; Non-linear controller; Transmission lines
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APA (6th Edition):
Turkseven, M. (2016). Design and control of a pneumatically driven MRI-compatible tele-operated haptic interface. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/55022
Chicago Manual of Style (16th Edition):
Turkseven, Melih. “Design and control of a pneumatically driven MRI-compatible tele-operated haptic interface.” 2016. Doctoral Dissertation, Georgia Tech. Accessed April 15, 2021.
http://hdl.handle.net/1853/55022.
MLA Handbook (7th Edition):
Turkseven, Melih. “Design and control of a pneumatically driven MRI-compatible tele-operated haptic interface.” 2016. Web. 15 Apr 2021.
Vancouver:
Turkseven M. Design and control of a pneumatically driven MRI-compatible tele-operated haptic interface. [Internet] [Doctoral dissertation]. Georgia Tech; 2016. [cited 2021 Apr 15].
Available from: http://hdl.handle.net/1853/55022.
Council of Science Editors:
Turkseven M. Design and control of a pneumatically driven MRI-compatible tele-operated haptic interface. [Doctoral Dissertation]. Georgia Tech; 2016. Available from: http://hdl.handle.net/1853/55022
Georgia Tech
21.
Lacey, Lauren Elizabeth.
Assessment of repetitive facilitation exercise with fMRI-compatible rehabilitation device for hemiparetic limbs.
Degree: MS, Mechanical Engineering, 2014, Georgia Tech
URL: http://hdl.handle.net/1853/51879
► In order for stroke subjects to gain functional recovery of their hemiparetic limbs, facilitation techniques such as the repetitive facilitation exercise, or RFE, have been…
(more)
▼ In order for stroke subjects to gain functional recovery of their hemiparetic limbs, facilitation techniques such as the repetitive facilitation exercise, or RFE, have been developed. Currently, there is a lack of understanding of the neural mechanisms associated with these types of facilitation techniques. To better understand the neural mechanisms associated with the RFE a functional magnetic resonance imaging (fMRI) study should be conducted. This thesis presents experimental results testing the feasibility of implementing an fMRI-compatible actuator to facilitate a myotatic reflex in synchronization with the subject’s intention to move their hemiparetic limb. Preliminary data from a healthy individual demonstrated the feasibility of overlapping the long latency component of the afferent myotatic reflex, created by electrical stimulation, with descending nerve impulses, created using transcranial magnetic stimulation, in a time window of 15ms. In addition, a pneumatic actuation time delay due to long transmission line was evaluated. The pneumatic actuator met the timing precision requirement for the rehabilitation device for varying transmission line lengths. Therefore a pneumatic actuation system was chosen for the rehabilitation device. This thesis will also presents on the design of an fMRI-compatible pneumatic actuator device to excite a stretch reflex response. Initial, experimental results with the device demonstrated that the designed pneumatic device can control the timing of the muscle response with a fixed signal within the required 15ms window required for cortical facilitation, which was found in the previous feasibility study. However, the device was unable to create a long latency reflex observable at the muscle. Finally, this thesis presents on the capability of the device in creating subthreshold long latency response with precision to overlap with a subthreshold descending nerve impulse, created using transcranial magnetic stimulation. The overlap of the two responses was evaluated by comparing the amplitude of the muscle response with and without the stretch reflex, created by the fMRI-compatible pneumatic actuator device. Varying time delays were analyzed.
Advisors/Committee Members: Ueda, Jun (advisor), Book, Wayne (committee member), Shinohara, Minoru (committee member).
Subjects/Keywords: Stroke; Rehabilitation device; fMRI-compatible; Long latency reflex; Hemiparetic; Stretch reflex; Pneumatics; Medical rehabilitation; Magnetic resonance imaging; Actuators; Pneumatic control
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APA (6th Edition):
Lacey, L. E. (2014). Assessment of repetitive facilitation exercise with fMRI-compatible rehabilitation device for hemiparetic limbs. (Masters Thesis). Georgia Tech. Retrieved from http://hdl.handle.net/1853/51879
Chicago Manual of Style (16th Edition):
Lacey, Lauren Elizabeth. “Assessment of repetitive facilitation exercise with fMRI-compatible rehabilitation device for hemiparetic limbs.” 2014. Masters Thesis, Georgia Tech. Accessed April 15, 2021.
http://hdl.handle.net/1853/51879.
MLA Handbook (7th Edition):
Lacey, Lauren Elizabeth. “Assessment of repetitive facilitation exercise with fMRI-compatible rehabilitation device for hemiparetic limbs.” 2014. Web. 15 Apr 2021.
Vancouver:
Lacey LE. Assessment of repetitive facilitation exercise with fMRI-compatible rehabilitation device for hemiparetic limbs. [Internet] [Masters thesis]. Georgia Tech; 2014. [cited 2021 Apr 15].
Available from: http://hdl.handle.net/1853/51879.
Council of Science Editors:
Lacey LE. Assessment of repetitive facilitation exercise with fMRI-compatible rehabilitation device for hemiparetic limbs. [Masters Thesis]. Georgia Tech; 2014. Available from: http://hdl.handle.net/1853/51879
Queens University
22.
Taghizadeh, Sasan.
Control of a Pneumatic System With Adaptive Neural Network Compensation
.
Degree: Mechanical and Materials Engineering, 2010, Queens University
URL: http://hdl.handle.net/1974/6125
► Considerable research has been conducted on the control of pneumatic systems due to their potential as a low-cost, clean, high power-to-weight ratio actuators. However, nonlinearities…
(more)
▼ Considerable research has been conducted on the control of pneumatic systems due to their potential as a low-cost, clean, high power-to-weight ratio actuators. However, nonlinearities such as those due to compressibility of air continue to limit their accuracy. Among the nonlinearities in a pneumatic system, friction can have a significant effect on tracking performance, especially in applications that use rodless cylinders which have higher Coulomb friction than rodded cylinders.
Compensation for nonlinearities in pneumatic systems has been a popular area of research in pneumatic system control. Most advanced nonlinear control strategies are based on a detailed mathematical model of the system. If a simplified mathematical model is used, then performance is sensitive to uncertainties and parameter variations in the robot. Although they show relatively good results, the requirement for model parameter identification has made these methods difficult to implement. This highlights the need for an adaptive controller that is not based on a mathematical model.
The objective of this thesis was to design and evaluate a position and velocity controller for application to a pneumatic gantry robot. An Adaptive Neural Network (ANN) structure was implemented as both a controller and as a compensator. The implemented ANN had online training as this was considered to be the algorithm that had the greatest potential to enhance the performance of the pneumatic system.
One axis of the robot was used to obtain results for the cases of velocity and position control. Seven different velocity controllers were tested and their performance compared. For position control, only two controllers were examined: conventional PID and PID with an ANN Compensator (ANNC). The position controllers were tuned for step changes in the setpoint. Their performance was evaluated as applied to sinusoid tracking.
It was shown that the addition of ANN as a compensator could improve the performance of both position and velocity control. For position control, the ANNC improved the tracking performance by over 20%. Although performance was better than with conventional PID control, it was concluded that the level of improvement with ANNC did not warrant the extra effort in tuning and implementation.
Subjects/Keywords: Pneumatics
;
Control
;
Neural Network
;
Compensation
;
Position
;
Robotics
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APA (6th Edition):
Taghizadeh, S. (2010). Control of a Pneumatic System With Adaptive Neural Network Compensation
. (Thesis). Queens University. Retrieved from http://hdl.handle.net/1974/6125
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Taghizadeh, Sasan. “Control of a Pneumatic System With Adaptive Neural Network Compensation
.” 2010. Thesis, Queens University. Accessed April 15, 2021.
http://hdl.handle.net/1974/6125.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Taghizadeh, Sasan. “Control of a Pneumatic System With Adaptive Neural Network Compensation
.” 2010. Web. 15 Apr 2021.
Vancouver:
Taghizadeh S. Control of a Pneumatic System With Adaptive Neural Network Compensation
. [Internet] [Thesis]. Queens University; 2010. [cited 2021 Apr 15].
Available from: http://hdl.handle.net/1974/6125.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Taghizadeh S. Control of a Pneumatic System With Adaptive Neural Network Compensation
. [Thesis]. Queens University; 2010. Available from: http://hdl.handle.net/1974/6125
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Delft University of Technology
23.
Romaniuk, Filip (author).
Digital Playground: Pneumatic interactive architecture in abandoned post-industrial structures.
Degree: 2020, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:e3c856fb-3525-4cb0-bd51-b7b25191a1b6
► The master's thesis explores the possibilities of reusing abandoned post-industrial structures and objects of architectural heritage. Objects, which are usually difficult to renovate due to…
(more)
▼ The master's thesis explores the possibilities of reusing abandoned post-industrial structures and objects of architectural heritage. Objects, which are usually difficult to renovate due to high costs and their poor physical condition, could be filled with new inflatable volumes and thus be filled with new space, function, and life. The work is inspired by designs from the 1960s and 70s of temporary and easily deployable inflatable installations, as well as the latest developments in soft robotics. Pneumatic structures equipped with sensors and activators would allow the creation of a responsive and interactive architecture evolving in time.
Architecture, Urbanism and Building Sciences | Robotic Building
Advisors/Committee Members: Bier, H.H. (mentor), Adema, F. (graduation committee), Hidding, A.J. (graduation committee), Rooij, R.M. (graduation committee), Delft University of Technology (degree granting institution).
Subjects/Keywords: pneumatic; Inflatable; Pneumatics; Interactive; Responsive Space; Responsive surface; Digital architecture; air; Plastic; Soft Robotics; Abandoned structures; Senses; touch; temporary architecture
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APA (6th Edition):
Romaniuk, F. (. (2020). Digital Playground: Pneumatic interactive architecture in abandoned post-industrial structures. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:e3c856fb-3525-4cb0-bd51-b7b25191a1b6
Chicago Manual of Style (16th Edition):
Romaniuk, Filip (author). “Digital Playground: Pneumatic interactive architecture in abandoned post-industrial structures.” 2020. Masters Thesis, Delft University of Technology. Accessed April 15, 2021.
http://resolver.tudelft.nl/uuid:e3c856fb-3525-4cb0-bd51-b7b25191a1b6.
MLA Handbook (7th Edition):
Romaniuk, Filip (author). “Digital Playground: Pneumatic interactive architecture in abandoned post-industrial structures.” 2020. Web. 15 Apr 2021.
Vancouver:
Romaniuk F(. Digital Playground: Pneumatic interactive architecture in abandoned post-industrial structures. [Internet] [Masters thesis]. Delft University of Technology; 2020. [cited 2021 Apr 15].
Available from: http://resolver.tudelft.nl/uuid:e3c856fb-3525-4cb0-bd51-b7b25191a1b6.
Council of Science Editors:
Romaniuk F(. Digital Playground: Pneumatic interactive architecture in abandoned post-industrial structures. [Masters Thesis]. Delft University of Technology; 2020. Available from: http://resolver.tudelft.nl/uuid:e3c856fb-3525-4cb0-bd51-b7b25191a1b6
Arizona State University
24.
Nuthi, Sai Gautham.
Computational Modeling and Experimental Characterization of
Pneumatically Driven Actuators for the Development of a Soft
Robotic Arm.
Degree: Mechanical Engineering, 2018, Arizona State University
URL: http://repository.asu.edu/items/49353
► Soft Poly-Limb (SPL) is a pneumatically driven, wearable, soft continuum robotic arm designed to aid humans with medical conditions, such as cerebral palsy, paraplegia, cervical…
(more)
▼ Soft Poly-Limb (SPL) is a pneumatically driven,
wearable, soft continuum robotic arm designed to aid humans with
medical conditions, such as cerebral palsy, paraplegia, cervical
spondylotic myelopathy, perform activities of daily living. To
support user's tasks, the SPL acts as an additional limb extending
from the human body which can be controlled to perform safe and
compliant mobile manipulation in three-dimensional space. The SPL
is inspired by invertebrate limbs, such as the elephant trunk and
the arms of the octopus. In this work, various geometrical and
physical parameters of the SPL are identified, and behavior of the
actuators that comprise it are studied by varying their parameters
through novel quasi-static computational models. As a result, this
study provides a set of engineering design rules to create soft
actuators for continuum soft robotic arms by understanding how
varying parameters affect the actuator's motion as a function of
the input pressure. A prototype of the SPL is fabricated to analyze
the accuracy of these computational models by performing linear
expansion, bending and arbitrary pose tests. Furthermore,
combinations of the parameters based on the application of the SPL
are determined to affect the weight, payload capacity, and
stiffness of the arm. Experimental results demonstrate the accuracy
of the proposed computational models and help in understanding the
behavior of soft compliant actuators. Finally, based on the set
functional requirements for the assistance of impaired users,
results show the effectiveness of the SPL in performing tasks for
activities of daily living.
Subjects/Keywords: Mechanical engineering; Robotics; Materials Science; Actuators; Computational Modeling; Elastomers; Finite Element Method; Pneumatics; Soft Robotic Arm
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APA (6th Edition):
Nuthi, S. G. (2018). Computational Modeling and Experimental Characterization of
Pneumatically Driven Actuators for the Development of a Soft
Robotic Arm. (Masters Thesis). Arizona State University. Retrieved from http://repository.asu.edu/items/49353
Chicago Manual of Style (16th Edition):
Nuthi, Sai Gautham. “Computational Modeling and Experimental Characterization of
Pneumatically Driven Actuators for the Development of a Soft
Robotic Arm.” 2018. Masters Thesis, Arizona State University. Accessed April 15, 2021.
http://repository.asu.edu/items/49353.
MLA Handbook (7th Edition):
Nuthi, Sai Gautham. “Computational Modeling and Experimental Characterization of
Pneumatically Driven Actuators for the Development of a Soft
Robotic Arm.” 2018. Web. 15 Apr 2021.
Vancouver:
Nuthi SG. Computational Modeling and Experimental Characterization of
Pneumatically Driven Actuators for the Development of a Soft
Robotic Arm. [Internet] [Masters thesis]. Arizona State University; 2018. [cited 2021 Apr 15].
Available from: http://repository.asu.edu/items/49353.
Council of Science Editors:
Nuthi SG. Computational Modeling and Experimental Characterization of
Pneumatically Driven Actuators for the Development of a Soft
Robotic Arm. [Masters Thesis]. Arizona State University; 2018. Available from: http://repository.asu.edu/items/49353
25.
Faria, Rafael Mendes.
Sistema de controle ativo inibidor de lesões por pressão.
Degree: 2017, Universidade Federal de Goiás; Programa de Pós-graduação em Modelagem e Otimização (RC); UFG; Brasil; Regional Catalão (RC)
URL: http://repositorio.bc.ufg.br/tede/handle/tede/7906
► Submitted by Luciana Ferreira ([email protected]) on 2017-10-25T13:06:00Z No. of bitstreams: 2 Dissertação - Rafael Mendes Faria - 2017.pdf: 5733284 bytes, checksum: bf9f3e985b0d7d92864841ce15120506 (MD5) license_rdf: 0…
(more)
▼ Submitted by Luciana Ferreira ([email protected]) on 2017-10-25T13:06:00Z No. of bitstreams: 2 Dissertação - Rafael Mendes Faria - 2017.pdf: 5733284 bytes, checksum: bf9f3e985b0d7d92864841ce15120506 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)
Approved for entry into archive by Luciana Ferreira ([email protected]) on 2017-10-25T13:07:00Z (GMT) No. of bitstreams: 2 Dissertação - Rafael Mendes Faria - 2017.pdf: 5733284 bytes, checksum: bf9f3e985b0d7d92864841ce15120506 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)
Made available in DSpace on 2017-10-25T13:07:00Z (GMT). No. of bitstreams: 2 Dissertação - Rafael Mendes Faria - 2017.pdf: 5733284 bytes, checksum: bf9f3e985b0d7d92864841ce15120506 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2017-03-28
At the treatment sites of people who are bedridden, usually in Intensive Care
Units, Long-Term Care Facilities for the Elderly and in the home environment due to the diffusion of home care, the incidence of Pressure Injury (LPP) is common. In order to reduce suffering and increase the life expectancy of patients with this problem, alternative methods are needed that can be introduced into the care of nursing teams to achieve the eradication or minimization of LPP. This paper presents a proposal of an innovative and low cost solution for LPP prevention. Applying concepts of automation and control, through existing technologies and low-cost components, the development of a device is developed that aims to assist the medical team and all those who have the responsibility of caring for individuals bedridden in LPP care. The device consists of pressure, humidity and temperature sensors, with a consequent real-time performance on these three variables at points with a higher probability of involvement of LPP.
Nos locais de tratamento de pessoas acamadas,
comumente em Unidades de Tratamento Intensivo, Instituições de Longa Permanência para Idosos e no próprio ambiente familiar devido à difusão do home care, é corriqueira a incidência de Lesões por Pressão (LPP). De modo a diminuir o sofrimento e aumentar a expectativa de vida dos enfermos com este problema são necessários métodos alternativos que possam ser introduzindo-os aos cuidados das equipes de enfermagem para alcançar a erradicação ou minimização das LPP. Este trabalho apresenta uma proposta de solução inovadora e de baixo custo para a prevenção da LPP. Aplicando conceitos de automação econtrole, por meio de tecnologias existentes e componentes de baixo custo, é realizado o desenvolvimento de um dispositivo que visa auxiliar a equipe médica e todas as pessoas que têm a responsabilidade de cuidar de indivíduos acamados nos cuidados relacionados às LPP. O dispositivo é composto por sensores de pressão, umidade e temperatura, com consequente atuação em tempo real sobre essas três
variáveis em pontos com maior probabilidade de acometimento das LPP.
Advisors/Committee Members: Stoppa, Marcelo Henrique, Stoppa, Marcelo Henrique, Paula, Heber Martins de, Vera, Ivânia.
Subjects/Keywords: Automação; Pneumática; Eletrônica; Lesão por pressão; Tecnologia assistiva; Automation; Pneumatics; Electronics; Pressure injury; Assistive technology; BIOENGENHARIA::MODELAGEM DE SISTEMAS BIOLOGICOS
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Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Faria, R. M. (2017). Sistema de controle ativo inibidor de lesões por pressão. (Masters Thesis). Universidade Federal de Goiás; Programa de Pós-graduação em Modelagem e Otimização (RC); UFG; Brasil; Regional Catalão (RC). Retrieved from http://repositorio.bc.ufg.br/tede/handle/tede/7906
Chicago Manual of Style (16th Edition):
Faria, Rafael Mendes. “Sistema de controle ativo inibidor de lesões por pressão.” 2017. Masters Thesis, Universidade Federal de Goiás; Programa de Pós-graduação em Modelagem e Otimização (RC); UFG; Brasil; Regional Catalão (RC). Accessed April 15, 2021.
http://repositorio.bc.ufg.br/tede/handle/tede/7906.
MLA Handbook (7th Edition):
Faria, Rafael Mendes. “Sistema de controle ativo inibidor de lesões por pressão.” 2017. Web. 15 Apr 2021.
Vancouver:
Faria RM. Sistema de controle ativo inibidor de lesões por pressão. [Internet] [Masters thesis]. Universidade Federal de Goiás; Programa de Pós-graduação em Modelagem e Otimização (RC); UFG; Brasil; Regional Catalão (RC); 2017. [cited 2021 Apr 15].
Available from: http://repositorio.bc.ufg.br/tede/handle/tede/7906.
Council of Science Editors:
Faria RM. Sistema de controle ativo inibidor de lesões por pressão. [Masters Thesis]. Universidade Federal de Goiás; Programa de Pós-graduação em Modelagem e Otimização (RC); UFG; Brasil; Regional Catalão (RC); 2017. Available from: http://repositorio.bc.ufg.br/tede/handle/tede/7906
KTH
26.
Schick, Bastian.
A Digital Test Bench for Pneumatic Brakes.
Degree: Rail Vehicles, 2021, KTH
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-290043
► This master’s thesis covers the structuring and implementation of a digital testbench for the air brake system of freight trains. The test bench will…
(more)
▼ This master’s thesis covers the structuring and implementation of a digital testbench for the air brake system of freight trains. The test bench will serveto further improve the existing brake models at Transrail Sweden AB. Theseare used for the optimised calculation of train speed profiles by the DriverAdvisory System CATO. This work is based on the research of the technicalbackground, as well as the methodical approach to physical modelling anda modular implementation of the test bench. It gives full flexibility for thesimulation of customised train configurations using the European UIC brakesystem. Train length and vehicle arrangement can be adapted to the user’sspecific needs. For example, the test bench could be used for the simulation ofa train with distributed power. The system parameters are stored in a vehiclelibrary for the convenient generation of train configurations. This vehiclelibrary is freely expandable.The simulation is based on an equivalent electric circuit model which iscompleted with nozzle flow modelling. This model involves monitoring themain pipe, brake cylinder and reservoir pressure. Linear approximation is usedto obtain braking forces for the individual wagons and for the whole train. Thedepiction of the brake system behaviour is mostly accurate in the operationalscenarios, which is validated with measurement data. Additional calibrationis required for further reduction of the simulation errors and an extension ofthe model’s domain of validity. The test bench is developed by incrementaland iterative modelling and prepared for further improvements and variations,for example the adaption to the American AAR system variant.The presented work can also be used as a basis for similar implementationssuch as driving simulators. The methods are transferable to other applicationsof modular simulation.
Det här examensarbetet omfattar formgivningen och implementeringen aven digital provbänk för tyckluftsbromssystemet på godståg. Provbänken skaanvändas för att vidareutveckla befintliga bromsmodeller hos Transrail SwedenAB. De används för beräkningen av optimerade hastighetsprofiler förtåg i förarassistanssystemet CATO. Arbetet baserar sig på undersökningenav den tekniska bakgrunden, samt ett metodiskt angreppssätt för fysikaliskmodellering. Verktyget är implementerat på ett modulärt sätt. Provbänkenger full flexibilitet för simuleringen av skräddarsydda tågkonfigurationer somanvänder det europeiska UIC-bromssystemet. Tåglängd och fordonsanordningkan anpassas enligt användarens behov, till exempel för simulering av fördeladtraktion. Systemparametrarna lagras i ett fordonsbiliotek som förenklar inmatningenav tågkonfigurationer. Fordonsbiblioteket kan utvidgas enligt behov.Simuleringen är baserad på en ekvivalent strömkretsmodell, som kompletterasmed modellerad dysströmning. Simuleringen beskriver trycket ihuvudledningen, bromscylindern och förrådsluftsbehållaren. Bromskrafternaapproximeras linjärt efter trycken för de enskilda vagnarna såväl som helatåget. Simuleringen återger beteendet av…
Subjects/Keywords: Compressed air brake; Freight train; Modular simulation; Pneumatics; Railways; System modelling; Tryckluftsbroms; Godståg; Modulär Simulering; Pneumatik; Järnväg; Systemmodellering; Vehicle Engineering; Farkostteknik
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APA (6th Edition):
Schick, B. (2021). A Digital Test Bench for Pneumatic Brakes. (Thesis). KTH. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-290043
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Schick, Bastian. “A Digital Test Bench for Pneumatic Brakes.” 2021. Thesis, KTH. Accessed April 15, 2021.
http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-290043.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Schick, Bastian. “A Digital Test Bench for Pneumatic Brakes.” 2021. Web. 15 Apr 2021.
Vancouver:
Schick B. A Digital Test Bench for Pneumatic Brakes. [Internet] [Thesis]. KTH; 2021. [cited 2021 Apr 15].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-290043.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Schick B. A Digital Test Bench for Pneumatic Brakes. [Thesis]. KTH; 2021. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-290043
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Vanderbilt University
27.
Willhite, Joel Andrew.
Dynamic Model-Based Design, Validation, and Characterization of a Compact, High-Inertance Free Liquid Piston Engine Compressor.
Degree: PhD, Mechanical Engineering, 2010, Vanderbilt University
URL: http://hdl.handle.net/1803/15240
► Pneumatically actuated robotic systems are attractive alternatives to traditional electromechanical systems (i.e., batteries and DC motors) due to the inherent power density advantage of pneumatic…
(more)
▼ Pneumatically actuated robotic systems are attractive alternatives to traditional electromechanical systems (i.e., batteries and DC motors) due to the inherent power density advantage of pneumatic actuators. This assumes that a power source is available to provide the pneumatic supply at a sufficient energy density to compete with batteries. To this end, a high-inertance free liquid piston compressor (HIFLPC) was developed as a portable, efficient, compact power supply for pneumatically actuated systems. Given that free piston engine performance is highly dependent on the dynamic characteristics of the piston, this work presents the idea of incorporating a liquid piston whose geometry can be manipulated to achieve the desired piston dynamics while maintaining the compactness and light weight necessary for applications in the power output range of 100W. An inertance-based dynamic model of the liquid piston is developed and validated experimentally. The piston model is incorporated into a complete system dynamic model of a proposed high inertance free liquid piston compressor (HIFLPC.) Critical model parameters for individual components and subsystems of a proposed HIFLPC prototype are experimentally characterized. The design and fabrication of an experimental prototype of the device is detailed. Efficiency, power output, and other operational characteristics of the prototype are assessed. A validation of the dynamic model developed for the HIFLPC is conducted, and model-based studies are performed to investigate the influence on system performance by varying liquid piston dynamics.
Advisors/Committee Members: George E. Cook (committee member), Michael Goldfarb (committee member), Robert J. Webster (committee member), Nilanjan Sarkar (committee member), Eric J. Barth (Committee Chair).
Subjects/Keywords: compressor; inertance; free piston; engine; pneumatics; dynamic modeling; power supply
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APA (6th Edition):
Willhite, J. A. (2010). Dynamic Model-Based Design, Validation, and Characterization of a Compact, High-Inertance Free Liquid Piston Engine Compressor. (Doctoral Dissertation). Vanderbilt University. Retrieved from http://hdl.handle.net/1803/15240
Chicago Manual of Style (16th Edition):
Willhite, Joel Andrew. “Dynamic Model-Based Design, Validation, and Characterization of a Compact, High-Inertance Free Liquid Piston Engine Compressor.” 2010. Doctoral Dissertation, Vanderbilt University. Accessed April 15, 2021.
http://hdl.handle.net/1803/15240.
MLA Handbook (7th Edition):
Willhite, Joel Andrew. “Dynamic Model-Based Design, Validation, and Characterization of a Compact, High-Inertance Free Liquid Piston Engine Compressor.” 2010. Web. 15 Apr 2021.
Vancouver:
Willhite JA. Dynamic Model-Based Design, Validation, and Characterization of a Compact, High-Inertance Free Liquid Piston Engine Compressor. [Internet] [Doctoral dissertation]. Vanderbilt University; 2010. [cited 2021 Apr 15].
Available from: http://hdl.handle.net/1803/15240.
Council of Science Editors:
Willhite JA. Dynamic Model-Based Design, Validation, and Characterization of a Compact, High-Inertance Free Liquid Piston Engine Compressor. [Doctoral Dissertation]. Vanderbilt University; 2010. Available from: http://hdl.handle.net/1803/15240
28.
Αργυράκης, Βάιος.
Θεωρητικό υπόβαθρο στο έργο «Πνευματικά» του Ήρωνα του Αλεξανδρινού.
Degree: 2012, University of Patras
URL: http://hdl.handle.net/10889/5525
► Τα Πνευματικά του Ήρωνα (1ος αιώνας μ.Χ.), προϊόν μακράς παράδοσης. Στην εισαγωγή του έργου εκτίθεται το θεωρητικό υπόβαθρο που υποστηρίζει τη λειτουργία των διατάξεων που…
(more)
▼ Τα Πνευματικά του Ήρωνα (1ος αιώνας μ.Χ.), προϊόν μακράς παράδοσης. Στην εισαγωγή του έργου εκτίθεται το θεωρητικό υπόβαθρο που υποστηρίζει τη λειτουργία των διατάξεων που παρουσιάζονται στη συνέχεια, αλλά και υποστηρίζεται πειραματικά από ορισμένες. Η δομή του έργου ακολουθεί τη δομή του ολοκληρωμένου μαθηματικού λόγου της κλασικής αρχαιότητας, προσαρμοσμένο κατάλληλα. Θέματα που αναδεικνύουμε είναι:
Η ολοκλήρωση της αρχής των συγκοινωνούντων δοχείων με την αυστηρή απόδειξη του αντίστροφου της πρότασης του Αρχιμήδη για τη σφαιρικότητα της επιφάνειας του ηρεμούντος υγρού. Η πειραματική απόδειξη της υλικότητας του αέρα. Διαδικασία που εναρμονίζει το πείραμα με προϋπάρχουσα θεωρία. Η πειραματική απόδειξη της ελαστικότητας του αέρα, ο οποίος μέχρι και τον Αριστοτέλη θεωρείται ασυμπίεστος, καθώς και της ύπαρξης κενού σε μακροσκοπική κλίμακα. Θέση που υποστηρίζεται πειραματικά από τρείς διαφορετικές διατάξεις. Η εξέλιξη της θεωρίας της αναθυμίασης (δημιουργία των ανέμων), προσθέτοντας στη φωτιά την ιδιότητα (δυνατότητα) δημιουργίας κενού. Η πειραματική (με τη διάταξη Ι.23) επαλήθευση της θέσης (που ανάγεται στον 5ο π.Χ. αιώνα) ότι τα ρευστά εναλλάσσονται στον ίδιο χώρο κατά ίσους όγκους. Μέσα από τα θέματα αυτά και την ανάδειξη των διατάξεων που τα υποστηρίζουν, επισημαίνουμε την ενσυνείδητη αποκατάσταση ενότητας θεωρίας και πράξης, ενώ φέρνουμε στο φως μια όχι ιδιαίτερα προσεγμένη κατηγορία διατάξεων αυτή των πειραματικών.
Heron’s (1st century A.D.) Pneumatics is the product of a long tradition. In the introduction to the work the theoretical background which explains the functioning of the devices which are analysed later in the work is presented. At the same time it is endorsed experimentally by some of them. The structure of the work follows that of the integrated mathematical language of classical antiquity, but appropriately adapted to the task at hand. The subjects which are highlighted are the following:
The completion of the proposition of communicating vessels with the rigorous proof of the inverse of Archimedes’ proposition for the sphericity of the surface of liquids in rest; the experimental demonstration of the corporeity of air, a procedure that harmonises the experiment with a pre-existing theory; the experimental demonstration of the elasticity of air, which, until Aristotle, had been considered to be incompressible, as well as the existence of the macroscopic vacuum, a position which is supported by three different experimental devices; the evolution of exhalation theory (wind creation) adding to fire the property of being able to create a vacuum; the experimental verification (by means of device I.23) of the position (dating from the 5th century BC) that liquids alternate in the same space in equal volumes. Through these issues and the examination of the devices that support them, we draw attention to the conscious unification of theory and practice, while we also bring to light a rather neglected area, that of experimental devices.
Advisors/Committee Members: Μπουντουρίδης, Μωυσής, Argyrakis, Vaios, Μπουντουρίδης, Μωυσής, Νικολαΐδης, Ευθύμιος, Παπαδοπετράκης, Ευτύχιος, Καφούσιας, Νικόλαος, Weele, Jacobus Pieter van der, Βιτωράτος, Ευάγγελος, Νικολαντωνάκης, Κωνσταντίνος.
Subjects/Keywords: Ήρωνας; Πνευματικά (τίτλος); Υδροπνευματικές διατάξεις; Εφαρμοσμένη υδροστατική; Τεχνολογία και φιλοσοφία; Θαυματοποιητική; Πειραματικές διατάξεις; 533.01; Heron; Pneumatics (title); Hydro-pneumatic devices; Applied hydrostatics; Technology and philosophy; Miracle working; Experimental devices
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APA ·
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APA (6th Edition):
Αργυράκης, . (2012). Θεωρητικό υπόβαθρο στο έργο «Πνευματικά» του Ήρωνα του Αλεξανδρινού. (Doctoral Dissertation). University of Patras. Retrieved from http://hdl.handle.net/10889/5525
Chicago Manual of Style (16th Edition):
Αργυράκης, Βάιος. “Θεωρητικό υπόβαθρο στο έργο «Πνευματικά» του Ήρωνα του Αλεξανδρινού.” 2012. Doctoral Dissertation, University of Patras. Accessed April 15, 2021.
http://hdl.handle.net/10889/5525.
MLA Handbook (7th Edition):
Αργυράκης, Βάιος. “Θεωρητικό υπόβαθρο στο έργο «Πνευματικά» του Ήρωνα του Αλεξανδρινού.” 2012. Web. 15 Apr 2021.
Vancouver:
Αργυράκης . Θεωρητικό υπόβαθρο στο έργο «Πνευματικά» του Ήρωνα του Αλεξανδρινού. [Internet] [Doctoral dissertation]. University of Patras; 2012. [cited 2021 Apr 15].
Available from: http://hdl.handle.net/10889/5525.
Council of Science Editors:
Αργυράκης . Θεωρητικό υπόβαθρο στο έργο «Πνευματικά» του Ήρωνα του Αλεξανδρινού. [Doctoral Dissertation]. University of Patras; 2012. Available from: http://hdl.handle.net/10889/5525
New Jersey Institute of Technology
29.
Puppala, Suresh.
Pneumatic fracture propagation and particulate transport in geologic formations.
Degree: PhD, Civil and Environmental Engineering, 1998, New Jersey Institute of Technology
URL: https://digitalcommons.njit.edu/dissertations/955
► Pneumatic fracturing is an in situ remediation enhancement technology developed to increase the permeability of contaminated geologic formations. This technology can also be used…
(more)
▼ Pneumatic fracturing is an
in situ remediation enhancement technology developed to increase the permeability of contaminated geologic formations. This technology can also be used to deliver atomized liquid and particulate supplements to geologic formations, thereby enhancing
in situ processes such as bioremediation and reactive dechlorination.
The main objective of this study was the development of a mathematical model that simulates the propagation of pneumatic fractures in soil and rock formations. Pneumatic fracture propagation differs from other fluid fracturing phenomena in the propagation velocity (1-3 m/sec) and the viscosity of the fracturing fluid (1.9E-05 Pa•sec). For the purposes of model development, the geologic formation was assumed to be homogenous with regard to composition, anisotropic with respect to pneumatic conductivity, and overconsolidated with respect to geostatic stress.
The propagation model was formulated by coupling equations describing the three physical processes controlling propagation: (i) pressure loss due to frictional effects; (ii) leak-off into the surrounding formation; and (iii) deflection of the overburden. Pressure dissipation was modeled based on Poiseuille's law, and leak-off was modeled using two-dimensional Darcian flow. The deflection of the overlying formation was modeled as a circular plate clamped at its edges and subjected to logarithmically varying load.
The model was solved numerically and the solution was expressed as an algorithm. The algorithm seeks an equilibrium fracture radius and aperture that simultaneously satisfies flow continuity and stress equilibrium criteria at the fracture tip. Different methods of solution convergence were examined and the Bisection Method was found to be the most efficient.
Sensitivity analyses showed that model behavior was dominated by the pneumatic conductivity of the geologic formation since this parameter largely determines leak-off rate. The algorithm was calibrated with field data from six different pneumatic fracturing projects and regressed values of pneumatic conductivity and elastic modulus showed reasonable agreement with field measured values. The most important result of the calibration process was the coincidence between the regressed conductivity (1.1E-03 to 1.8E-05) and the post-fracture conductivities measured in the field (3.1E-03 to 1.7E-05). This result supported the fundamental thesis that final fracture radius is determined with the geologic formation in a disturbed state.
A separate pneumatic fracture propagation model was developed and solved based solely on the continuity criterion. The solution demonstrated reasonable correlation with field measured radii, although it tended to overestimate fracture radius in soil formations at shallow depths of injection (on an average 15 % more than field measured radius).
As a secondary objective of this study, a methodology to model the mechanism of particulate transport in a fluidized soil formation…
Advisors/Committee Members: John R. Schuring, Denis L. Blackmore, Paul C. Chan.
Subjects/Keywords: Pneumatics – Environmental aspects.; Fracture mechanics – Environmental aspects.; In situ remediation.; Civil Engineering
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APA ·
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APA (6th Edition):
Puppala, S. (1998). Pneumatic fracture propagation and particulate transport in geologic formations. (Doctoral Dissertation). New Jersey Institute of Technology. Retrieved from https://digitalcommons.njit.edu/dissertations/955
Chicago Manual of Style (16th Edition):
Puppala, Suresh. “Pneumatic fracture propagation and particulate transport in geologic formations.” 1998. Doctoral Dissertation, New Jersey Institute of Technology. Accessed April 15, 2021.
https://digitalcommons.njit.edu/dissertations/955.
MLA Handbook (7th Edition):
Puppala, Suresh. “Pneumatic fracture propagation and particulate transport in geologic formations.” 1998. Web. 15 Apr 2021.
Vancouver:
Puppala S. Pneumatic fracture propagation and particulate transport in geologic formations. [Internet] [Doctoral dissertation]. New Jersey Institute of Technology; 1998. [cited 2021 Apr 15].
Available from: https://digitalcommons.njit.edu/dissertations/955.
Council of Science Editors:
Puppala S. Pneumatic fracture propagation and particulate transport in geologic formations. [Doctoral Dissertation]. New Jersey Institute of Technology; 1998. Available from: https://digitalcommons.njit.edu/dissertations/955
New Jersey Institute of Technology
30.
Fernandez, Hugo J.
An investigation into the feasibility of utilizing pneumatic ultrasonic devices coupled with pneumatic fracturing in enhancing removal of volatile organic compounds from soils.
Degree: MSin Chemical Engineering - (M.S.), Chemical Engineering, Chemistry and Environmental Science, 1997, New Jersey Institute of Technology
URL: https://digitalcommons.njit.edu/theses/1003
► A bench scale investigation was conducted in a Plexiglass ™ Test cell 1 foot square by 2 feet in height, packed with 400 mesh…
(more)
▼ A bench scale investigation was conducted in a Plexiglass ™ Test cell 1 foot square by 2 feet in height, packed with 400 mesh sand to a density of 100 lb. /ft
3. The sand was contaminated with a mixture of 10% ethanol and 90% water by weight having a total weight of 11.1 pounds, before it was packed in the test cell. A geotextile 1/2 inch thick was used as a simulated fracture and was placed 3 inches from the bottom of the tank. A siren and a whistle were tested in this fracture.
The data were divided into a transient, two phase flow region, and a falling rate region similar to drying theory analysis. Free moisture versus time data showed a 39.1% improvement for the siren and a 412.4% improvement for the whistle in the transient region, and a 69% improvement for the siren and a 455 % improvement for the whistle in the falling rate region. Concentration of ethanol versus time data showed a 62.9% improvement for the siren in the transient region and no comparison was established for the whistle. A 192.0% improvement for the siren and a 931.4 % improvement for the whistle were measured in the falling rate region.
The average time to reach asymptotic value of 0.01 free moisture with the siren was reduced by 37% and greater than 74.3% with the whistle. The average time to reach an ethanol concentration of 1 ppmv was reduced by greater than 41.3% with the siren and by greater than 74% with the whistle.
Advisors/Committee Members: Deran Hanesian, Angelo J. Perna, John R. Schuring.
Subjects/Keywords: Soil vapor extraction.; Volatile organic compounds.; Pneumatics.; Fracture mechanics.; Chemical Engineering
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APA (6th Edition):
Fernandez, H. J. (1997). An investigation into the feasibility of utilizing pneumatic ultrasonic devices coupled with pneumatic fracturing in enhancing removal of volatile organic compounds from soils. (Thesis). New Jersey Institute of Technology. Retrieved from https://digitalcommons.njit.edu/theses/1003
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Fernandez, Hugo J. “An investigation into the feasibility of utilizing pneumatic ultrasonic devices coupled with pneumatic fracturing in enhancing removal of volatile organic compounds from soils.” 1997. Thesis, New Jersey Institute of Technology. Accessed April 15, 2021.
https://digitalcommons.njit.edu/theses/1003.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Fernandez, Hugo J. “An investigation into the feasibility of utilizing pneumatic ultrasonic devices coupled with pneumatic fracturing in enhancing removal of volatile organic compounds from soils.” 1997. Web. 15 Apr 2021.
Vancouver:
Fernandez HJ. An investigation into the feasibility of utilizing pneumatic ultrasonic devices coupled with pneumatic fracturing in enhancing removal of volatile organic compounds from soils. [Internet] [Thesis]. New Jersey Institute of Technology; 1997. [cited 2021 Apr 15].
Available from: https://digitalcommons.njit.edu/theses/1003.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Fernandez HJ. An investigation into the feasibility of utilizing pneumatic ultrasonic devices coupled with pneumatic fracturing in enhancing removal of volatile organic compounds from soils. [Thesis]. New Jersey Institute of Technology; 1997. Available from: https://digitalcommons.njit.edu/theses/1003
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
◁ [1] [2] ▶
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Open Access Theses and Dissertations
