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You searched for subject:(Damper Tuning). Showing records 1 – 2 of 2 total matches.

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1. Organiscak, Matthew Joseph. Model Based Suspension Calibration for Hybrid Vehicle Ride and Handling Recovery.

Degree: MS, Mechanical Engineering, 2014, The Ohio State University

Automotive manufacturers spend many years designing, developing, and manufacturing each new model to the best of their ability. The push to shorten the time of a design cycle is motivated by reducing development costs and creating a more competitive advantage. Model based design and computer simulations have an increasing presence in the automotive industry for this reason. In the automotive industry, current ride and handling tuning methods are subjective in nature. There are few, if any, objective evaluations of the vehicle ride and handling performance. EcoCAR 2 is a three year collegiate design competition, in which 15 teams compete to develop a vehicle with lower petroleum consumption and fewer emissions. The teams begin the task with a 2013 Chevrolet Malibu and are challenged with maintaining consumer acceptability. The stock vehicle has been modified greatly by removal of the stock powertrain and battery system. Nearly 900 lbs of batteries and supporting components have been added to the trunk of the car along with an electric motor and single speed transmission. This change in vehicle mass has led to issues with poor ride and handling performance. Model based calibration of the suspension dampers can be seen as a method to recover some of the lost performance. A CarSIM Model of the vehicle was developed after numerous measurements involving a vehicle inertial measurement facility as well as a kinematics and compliance test from a suspension parameter measurement device. The CarSIM model was validated using experimental testing data. The vehicle was subjected to several different tests including a steady state handling test, transient handling test, and a ride test. To understand how different damper curve parameters would affect the performance of the vehicle, a design of experiments was developed using CarSIM to obtain the outputs. The seven objective metrics based on passenger comfort were used to create seven response surface equations based on the results of the DOE. Once the response surface equations are validated and considered to be accurate enough to be useful, a minimization optimization was performed to determine what inputs will return the lowest output value from each response surface. The individual response surface equation minimization showed that it was able to decrease uncomfortable accelerations and pitch motions while maintaining a vehicle that is easy to drive through transient handling maneuvers. Advisors/Committee Members: Rizzoni, Giorgio (Advisor).

Subjects/Keywords: Mechanical Engineering; Damper Tuning; Ride and Handling; Hybrid Vehicles; EcoCAR 2

…35 3.8 Damper Tuning… …Subjective Handling Tuning Currently, the automotive industry tunes damper characteristics in a… …12 2.2 Subjective Handling Tuning… …13 2.3 Objective Handling Tuning Combined Approach… …43 4.4 Possibilities for Tuning… 

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Organiscak, M. J. (2014). Model Based Suspension Calibration for Hybrid Vehicle Ride and Handling Recovery. (Masters Thesis). The Ohio State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=osu1406296312

Chicago Manual of Style (16th Edition):

Organiscak, Matthew Joseph. “Model Based Suspension Calibration for Hybrid Vehicle Ride and Handling Recovery.” 2014. Masters Thesis, The Ohio State University. Accessed November 15, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1406296312.

MLA Handbook (7th Edition):

Organiscak, Matthew Joseph. “Model Based Suspension Calibration for Hybrid Vehicle Ride and Handling Recovery.” 2014. Web. 15 Nov 2019.

Vancouver:

Organiscak MJ. Model Based Suspension Calibration for Hybrid Vehicle Ride and Handling Recovery. [Internet] [Masters thesis]. The Ohio State University; 2014. [cited 2019 Nov 15]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1406296312.

Council of Science Editors:

Organiscak MJ. Model Based Suspension Calibration for Hybrid Vehicle Ride and Handling Recovery. [Masters Thesis]. The Ohio State University; 2014. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1406296312

2. Eltaeb, Mohamed A. Active Control of Pendulum Tuned Mass Dampers for Tall Buildings Subject to Wind Load.

Degree: PhD, Mechanical Engineering, 2017, University of Dayton

Wind induced vibration in tall structures is an important problem that needs effective and practical solutions. TMDs in either passive, active or semi-active form are the most common devices used to reduce wind-induced vibration. The objective of this research is to investigate and develop an effective model of a single multi degree of freedom (MDOF) active pendulum tuned mass damper (APTMD) controlled by hydraulic system in order to mitigate the dynamic response of the proposed tall building perturbed by wind loads in different directions. The proposed APTMD can be tuned to the first three dominant frequencies of the targeted structure in three directions (X, Y, <i>¿</i>) simultaneously and add damping to the corresponding modes. Another design requirement of the APTMD is the capability of adjusting its properties (stiffness and damping) to compensate for the detuning occurred due to the varying operating conditions such as an environment, or imposed loading. These supplemental damping devices offer attractive means to protect tall buildings against natural hazards and make a genuine contribution to the building sway, which has such a great economic and social effects. The targeted structure for the proposed approach in this work is a MDOF model representing a full scale concrete tall building. This building is a modern high-rise building designed as a flexible and slender structure, asymmetric geometry, excited by wind loads in multiple directions. The building has 41 stories above the ground where each floor has three degrees of freedom, two in x,y directions (planar) and one around the axis perpendicular to x-y plane <i>¿</i> (rotational). The first 15 modes of the building will be included in this study, five modes in each direction.The innovative idea of this work is involving the Stewart Platform, was originally designed in 1965 as a flight simulator, and it is still commonly used for that purpose. It is controlled by hydraulic system that is used for motion control (position control) of the pendulum TMD relative to the building. The pendulum itself is a passive device but as it is comprised with active-controlled hydraulic actuators, the legs of the Stewart Platform in our case, it becomes an active system. The electrohydraulic servo valve is used to control the hydraulic system of the proposed active PTMD because it can offer more responsive and accurate control tasks in a timely manner. By combining the muscle of the hydraulic power and the accuracy of electrical control, electrohydraulic control valves can control hydraulic systems precisely and efficiently. The desired control force is calculated from the acceleration, velocity, and displacement feedbacks of the MDOF system and active PTMD in order to achieve the different tuning frequencies and damping effects. The proposed tasks for the conduct of `Multi Tuning-frequency Passive/on demand Active Pendulum Tuned Mass Damper’ research are: To synthesize the control scheme for active Pendulum TMD that can be tuned simultaneously to multiple directions… Advisors/Committee Members: Kashani, Reza (Committee Chair).

Subjects/Keywords: Mechanical Engineering; multi tuning frequency; passive on demand active; pendulum TMD; tuned mass damper; structural damping

…20 2.3 Tuned Mass Damper (TMD)… …21 2.3.1 Passive Tuned Mass Damper (PTMD)… …25 viii 2.3.2 Active Tuned Mass Damper (ATMD)… …26 2.3.3 Semi-Active Tuned Mass Damper (SATMD)… …33 2.4 Active Pendulum Tuned Mass Damper and Structure Model… 

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Eltaeb, M. A. (2017). Active Control of Pendulum Tuned Mass Dampers for Tall Buildings Subject to Wind Load. (Doctoral Dissertation). University of Dayton. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=dayton150343994189116

Chicago Manual of Style (16th Edition):

Eltaeb, Mohamed A. “Active Control of Pendulum Tuned Mass Dampers for Tall Buildings Subject to Wind Load.” 2017. Doctoral Dissertation, University of Dayton. Accessed November 15, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=dayton150343994189116.

MLA Handbook (7th Edition):

Eltaeb, Mohamed A. “Active Control of Pendulum Tuned Mass Dampers for Tall Buildings Subject to Wind Load.” 2017. Web. 15 Nov 2019.

Vancouver:

Eltaeb MA. Active Control of Pendulum Tuned Mass Dampers for Tall Buildings Subject to Wind Load. [Internet] [Doctoral dissertation]. University of Dayton; 2017. [cited 2019 Nov 15]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=dayton150343994189116.

Council of Science Editors:

Eltaeb MA. Active Control of Pendulum Tuned Mass Dampers for Tall Buildings Subject to Wind Load. [Doctoral Dissertation]. University of Dayton; 2017. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=dayton150343994189116

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