subject:(Inverse Sinusoidal Input Describing Function)

University of Houston

1. Zamanian, Fatemeh. Nonlinear Controller Design for Regulating Systems.

Degree: PhD, Mechanical Engineering, University of Houston

► Presented in this dissertation is a nonlinear controller synthesis methodology based on the inverse Sinusoidal Input Describing Function (SIDF) for a class of regulating systems.… (more)

Subjects/Keywords: Nonlinear Control; Frequency Domain; Inverse Sinusoidal Input Describing Function; H_∞ Linear Control Synthesis; BIBO Stability; Inverse Sinusoidal Input Describing Function; Gain distortions; Phase distortions; Memoryless Nonlinearities

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

APA (6^th Edition):

Zamanian, F. (n.d.). Nonlinear Controller Design for Regulating Systems. (Doctoral Dissertation). University of Houston. Retrieved from http://hdl.handle.net/10657/2830

Note: this citation may be lacking information needed for this citation format:
No year of publication.

Chicago Manual of Style (16^th Edition):

Zamanian, Fatemeh. “Nonlinear Controller Design for Regulating Systems.” Doctoral Dissertation, University of Houston. Accessed January 25, 2021. http://hdl.handle.net/10657/2830.

Note: this citation may be lacking information needed for this citation format:
No year of publication.

MLA Handbook (7^th Edition):

Zamanian, Fatemeh. “Nonlinear Controller Design for Regulating Systems.” Web. 25 Jan 2021.

Note: this citation may be lacking information needed for this citation format:
No year of publication.

Vancouver:

Zamanian F. Nonlinear Controller Design for Regulating Systems. [Internet] [Doctoral dissertation]. University of Houston; [cited 2021 Jan 25]. Available from: http://hdl.handle.net/10657/2830.

Note: this citation may be lacking information needed for this citation format:
No year of publication.

Council of Science Editors:

Zamanian F. Nonlinear Controller Design for Regulating Systems. [Doctoral Dissertation]. University of Houston; Available from: http://hdl.handle.net/10657/2830

Note: this citation may be lacking information needed for this citation format:
No year of publication.

Virginia Tech

2. Lamendola, Joel E. Limit Cycle PIO Analysis With Simultaneously Acting Multiple Asymmetric Saturation.

Degree: MS, Aerospace and Ocean Engineering, 1998, Virginia Tech

URL: http://hdl.handle.net/10919/36767

► Pilot in-the-loop oscillation (PIO) is a phenomenon which occurs due to the dynamic interaction between pilot and aircraft. This detrimental aircraft handling quality appears through… (more)

Subjects/Keywords: Limit Cycle; PIO; Describing Function; Dual Input Descibing Function

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

APA (6^th Edition):

Lamendola, J. E. (1998). Limit Cycle PIO Analysis With Simultaneously Acting Multiple Asymmetric Saturation. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/36767

Chicago Manual of Style (16^th Edition):

Lamendola, Joel E. “Limit Cycle PIO Analysis With Simultaneously Acting Multiple Asymmetric Saturation.” 1998. Masters Thesis, Virginia Tech. Accessed January 25, 2021. http://hdl.handle.net/10919/36767.

MLA Handbook (7^th Edition):

Lamendola, Joel E. “Limit Cycle PIO Analysis With Simultaneously Acting Multiple Asymmetric Saturation.” 1998. Web. 25 Jan 2021.

Vancouver:

Lamendola JE. Limit Cycle PIO Analysis With Simultaneously Acting Multiple Asymmetric Saturation. [Internet] [Masters thesis]. Virginia Tech; 1998. [cited 2021 Jan 25]. Available from: http://hdl.handle.net/10919/36767.

Council of Science Editors:

Lamendola JE. Limit Cycle PIO Analysis With Simultaneously Acting Multiple Asymmetric Saturation. [Masters Thesis]. Virginia Tech; 1998. Available from: http://hdl.handle.net/10919/36767

3. Auciomar Carlos Teixeira de Cerqueira. Estimação e compensação de não linearidades inerentes aos atuadores dos processos industriais.

Degree: 2009, Universidade Federal do Rio Grande do Norte

URL: http://bdtd.bczm.ufrn.br/tedesimplificado//tde_busca/arquivo.php?codArquivo=3539

►

As oscilações presentes nas malhas de controle podem causar prejuízos à indústria petroquímica. Anular, ou até mesmo amenizar tais oscilações, acarretaria em uma grande economia.… (more)

Subjects/Keywords: Estimação de parâmetros; compensação inversa; não linearidade; zona- morta; folga; modelo de hammerstein; função descritiva; ENGENHARIAS; parameters estimation; nonlinearity; inverse compensation; dead-zone; backlash; hammerstein model; describing function

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

APA (6^th Edition):

Cerqueira, A. C. T. d. (2009). Estimação e compensação de não linearidades inerentes aos atuadores dos processos industriais. (Thesis). Universidade Federal do Rio Grande do Norte. Retrieved from http://bdtd.bczm.ufrn.br/tedesimplificado//tde_busca/arquivo.php?codArquivo=3539

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Cerqueira, Auciomar Carlos Teixeira de. “Estimação e compensação de não linearidades inerentes aos atuadores dos processos industriais.” 2009. Thesis, Universidade Federal do Rio Grande do Norte. Accessed January 25, 2021. http://bdtd.bczm.ufrn.br/tedesimplificado//tde_busca/arquivo.php?codArquivo=3539.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Cerqueira, Auciomar Carlos Teixeira de. “Estimação e compensação de não linearidades inerentes aos atuadores dos processos industriais.” 2009. Web. 25 Jan 2021.

Vancouver:

Cerqueira ACTd. Estimação e compensação de não linearidades inerentes aos atuadores dos processos industriais. [Internet] [Thesis]. Universidade Federal do Rio Grande do Norte; 2009. [cited 2021 Jan 25]. Available from: http://bdtd.bczm.ufrn.br/tedesimplificado//tde_busca/arquivo.php?codArquivo=3539.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Cerqueira ACTd. Estimação e compensação de não linearidades inerentes aos atuadores dos processos industriais. [Thesis]. Universidade Federal do Rio Grande do Norte; 2009. Available from: http://bdtd.bczm.ufrn.br/tedesimplificado//tde_busca/arquivo.php?codArquivo=3539

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Universidade do Rio Grande do Norte

4. Cerqueira, Auciomar Carlos Teixeira de. Estimação e compensação de não linearidades inerentes aos atuadores dos processos industriais .

Degree: 2009, Universidade do Rio Grande do Norte

URL: http://repositorio.ufrn.br/handle/123456789/12916

► The oscillations presents in control loops can cause damages in petrochemical industry. Canceling, or even preventing such oscillations, would save up to large amount of… (more)

Subjects/Keywords: Estimação de parâmetros; compensação inversa; não linearidade; zona- morta; folga; modelo de hammerstein; função descritiva; parameters estimation; nonlinearity; inverse compensation; dead-zone; backlash; hammerstein model; describing function

Record Details Similar Records Cite « Share

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

APA (6^th Edition):

Cerqueira, A. C. T. d. (2009). Estimação e compensação de não linearidades inerentes aos atuadores dos processos industriais . (Thesis). Universidade do Rio Grande do Norte. Retrieved from http://repositorio.ufrn.br/handle/123456789/12916

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Cerqueira, Auciomar Carlos Teixeira de. “Estimação e compensação de não linearidades inerentes aos atuadores dos processos industriais .” 2009. Thesis, Universidade do Rio Grande do Norte. Accessed January 25, 2021. http://repositorio.ufrn.br/handle/123456789/12916.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Cerqueira, Auciomar Carlos Teixeira de. “Estimação e compensação de não linearidades inerentes aos atuadores dos processos industriais .” 2009. Web. 25 Jan 2021.

Vancouver:

Cerqueira ACTd. Estimação e compensação de não linearidades inerentes aos atuadores dos processos industriais . [Internet] [Thesis]. Universidade do Rio Grande do Norte; 2009. [cited 2021 Jan 25]. Available from: http://repositorio.ufrn.br/handle/123456789/12916.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Cerqueira ACTd. Estimação e compensação de não linearidades inerentes aos atuadores dos processos industriais . [Thesis]. Universidade do Rio Grande do Norte; 2009. Available from: http://repositorio.ufrn.br/handle/123456789/12916

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

NSYSU

5. Chien, Chia-Wei. Design of Adaptive Block Backstepping Controllers for Perturbed Nonlinear Systems with Input Nonlinearities.

Degree: Master, Electrical Engineering, 2012, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0201112-142226

► Based on the Lyapunov stability theorem, a design methodology of adaptive block backstepping control scheme is proposed in this thesis for a class of multi-input… (more)

Subjects/Keywords: adaptive block backstepping controller; Lyapunov stability theorem; semi-strict feedback form; fuzzy inverse function estimator; input nonlinearities

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

APA (6^th Edition):

Chien, C. (2012). Design of Adaptive Block Backstepping Controllers for Perturbed Nonlinear Systems with Input Nonlinearities. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0201112-142226

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Chien, Chia-Wei. “Design of Adaptive Block Backstepping Controllers for Perturbed Nonlinear Systems with Input Nonlinearities.” 2012. Thesis, NSYSU. Accessed January 25, 2021. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0201112-142226.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Chien, Chia-Wei. “Design of Adaptive Block Backstepping Controllers for Perturbed Nonlinear Systems with Input Nonlinearities.” 2012. Web. 25 Jan 2021.

Vancouver:

Chien C. Design of Adaptive Block Backstepping Controllers for Perturbed Nonlinear Systems with Input Nonlinearities. [Internet] [Thesis]. NSYSU; 2012. [cited 2021 Jan 25]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0201112-142226.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Chien C. Design of Adaptive Block Backstepping Controllers for Perturbed Nonlinear Systems with Input Nonlinearities. [Thesis]. NSYSU; 2012. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0201112-142226

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Cambridge

6. Orchini, Alessandro. Modelling and analysis of nonlinear thermoacoustic systems using frequency and time domain methods.

Degree: PhD, 2017, University of Cambridge

URL: https://doi.org/10.17863/CAM.8914 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.707797

► In this thesis, low-order nonlinear models for the prediction of the nonlinear behaviour of thermoacoustic systems are developed. These models are based on thermoacoustic networks,… (more)

▼ In this thesis, low-order nonlinear models for the prediction of the nonlinear behaviour of thermoacoustic systems are developed. These models are based on thermoacoustic networks, in which linear acoustics is combined with a nonlinear heat release model. The acoustic networks considered in this thesis can take into account mean flow and non-trivial acoustic reflection coefficients, and are cast in state-space form to enable analysis both in the frequency and time domains. Starting from linear analysis, the stability of thermoacoustic networks is investigated, and the use of adjoint methods for understanding the role of the system's parameters on its stability is demonstrated. Then, a nonlinear analysis using various state-of-the-art methods is performed, to highlight the strengths and weaknesses of each method. Two novel frameworks that fill some gaps in the available methods are developed: the first, called Flame Double Input Describing Function (FDIDF), is an extension of the Flame Describing Function (FDF). The FDIDF approximates the flame nonlinear response when it is forced simultaneously with two frequencies, whereas the FDF is limited to one frequency. Although more expensive to obtain, the FDIDF contains more nonlinear information than the FDF, and can predict periodic and quasiperiodic oscillations. It is shown how, in some cases, it corrects the prediction of the FDF about the stability of thermoacoustic oscillations. The second framework developed is a weakly nonlinear formulation of the thermoacoustic equations in the Rijke tube, in which the acoustic response is not limited to a single-Galerkin mode, and is embedded in a state-space model. The weakly nonlinear analysis is strictly valid only close to the expansion point, but is much cheaper than any other available method. The above methods are applied to relatively simple thermoacoustic configurations, in which the nonlinear heat release model is that of a laminar conical flame or an electrical heater. However, in real gas turbines more complex flame shapes are found, for which no reliable low-order models exist. Two models are developed in this thesis for turbulent bluff-body stabilised flames: one for a perfectly premixed flame, in which the modelling is focused on the flame-flow interaction, accounting for the presence of recirculation zones and temperature gradients; the second for imperfectly premixed flames, in which equivalence ratio fluctuations, modelled as a passive scalar field, dominate the heat release response. The second model was shown to agree reasonably well with experimental data, and was applied in an industrial modelling project.

Subjects/Keywords: 620.2; Thermoacoustics; Nonlinear dynamics; Describing Function; Low-order modelling; Acoustics

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

APA (6^th Edition):

Orchini, A. (2017). Modelling and analysis of nonlinear thermoacoustic systems using frequency and time domain methods. (Doctoral Dissertation). University of Cambridge. Retrieved from https://doi.org/10.17863/CAM.8914 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.707797

Chicago Manual of Style (16^th Edition):

Orchini, Alessandro. “Modelling and analysis of nonlinear thermoacoustic systems using frequency and time domain methods.” 2017. Doctoral Dissertation, University of Cambridge. Accessed January 25, 2021. https://doi.org/10.17863/CAM.8914 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.707797.

MLA Handbook (7^th Edition):

Orchini, Alessandro. “Modelling and analysis of nonlinear thermoacoustic systems using frequency and time domain methods.” 2017. Web. 25 Jan 2021.

Vancouver:

Orchini A. Modelling and analysis of nonlinear thermoacoustic systems using frequency and time domain methods. [Internet] [Doctoral dissertation]. University of Cambridge; 2017. [cited 2021 Jan 25]. Available from: https://doi.org/10.17863/CAM.8914 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.707797.

Council of Science Editors:

Orchini A. Modelling and analysis of nonlinear thermoacoustic systems using frequency and time domain methods. [Doctoral Dissertation]. University of Cambridge; 2017. Available from: https://doi.org/10.17863/CAM.8914 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.707797

7. Orchini, Alessandro. Modelling and analysis of nonlinear thermoacoustic systems using frequency and time domain methods.

Degree: PhD, 2017, University of Cambridge

URL: https://www.repository.cam.ac.uk/handle/1810/263562https://www.repository.cam.ac.uk/bitstream/1810/263562/2/4f6ae966-5b7e-4bc0-9dcb-d94efbf46e92_confirmations.txt ; https://www.repository.cam.ac.uk/bitstream/1810/263562/3/license.txt ; https://www.repository.cam.ac.uk/bitstream/1810/263562/4/4f6ae966-5b7e-4bc0-9dcb-d94efbf46e92.zip ; https://www.repository.cam.ac.uk/bitstream/1810/263562/5/Orchini_Thesis.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/263562/6/Orchini_Thesis.pdf.jpg

► In this thesis, low-order nonlinear models for the prediction of the nonlinear behaviour of thermoacoustic systems are developed. These models are based on thermoacoustic networks,… (more)

▼ In this thesis, low-order nonlinear models for the prediction of the nonlinear behaviour of thermoacoustic systems are developed. These models are based on thermoacoustic networks, in which linear acoustics is combined with a nonlinear heat release model. The acoustic networks considered in this thesis can take into account mean flow and non-trivial acoustic reflection coefficients, and are cast in state-space form to enable analysis both in the frequency and time domains. Starting from linear analysis, the stability of thermoacoustic networks is investigated, and the use of adjoint methods for understanding the role of the system's parameters on its stability is demonstrated. Then, a nonlinear analysis using various state-of-the-art methods is performed, to highlight the strengths and weaknesses of each method. Two novel frameworks that fill some gaps in the available methods are developed: the first, called Flame Double Input Describing Function (FDIDF), is an extension of the Flame Describing Function (FDF). The FDIDF approximates the flame nonlinear response when it is forced simultaneously with two frequencies, whereas the FDF is limited to one frequency. Although more expensive to obtain, the FDIDF contains more nonlinear information than the FDF, and can predict periodic and quasiperiodic oscillations. It is shown how, in some cases, it corrects the prediction of the FDF about the stability of thermoacoustic oscillations. The second framework developed is a weakly nonlinear formulation of the thermoacoustic equations in the Rijke tube, in which the acoustic response is not limited to a single-Galerkin mode, and is embedded in a state-space model. The weakly nonlinear analysis is strictly valid only close to the expansion point, but is much cheaper than any other available method. The above methods are applied to relatively simple thermoacoustic configurations, in which the nonlinear heat release model is that of a laminar conical flame or an electrical heater. However, in real gas turbines more complex flame shapes are found, for which no reliable low-order models exist. Two models are developed in this thesis for turbulent bluff-body stabilised flames: one for a perfectly premixed flame, in which the modelling is focused on the flame-flow interaction, accounting for the presence of recirculation zones and temperature gradients; the second for imperfectly premixed flames, in which equivalence ratio fluctuations, modelled as a passive scalar field, dominate the heat release response. The second model was shown to agree reasonably well with experimental data, and was applied in an industrial modelling project.

Subjects/Keywords: Thermoacoustics; Nonlinear dynamics; Describing Function; Low-order modelling; Acoustics

11 more images…

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

APA (6^th Edition):

Orchini, A. (2017). Modelling and analysis of nonlinear thermoacoustic systems using frequency and time domain methods. (Doctoral Dissertation). University of Cambridge. Retrieved from https://www.repository.cam.ac.uk/handle/1810/263562https://www.repository.cam.ac.uk/bitstream/1810/263562/2/4f6ae966-5b7e-4bc0-9dcb-d94efbf46e92_confirmations.txt ; https://www.repository.cam.ac.uk/bitstream/1810/263562/3/license.txt ; https://www.repository.cam.ac.uk/bitstream/1810/263562/4/4f6ae966-5b7e-4bc0-9dcb-d94efbf46e92.zip ; https://www.repository.cam.ac.uk/bitstream/1810/263562/5/Orchini_Thesis.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/263562/6/Orchini_Thesis.pdf.jpg

Chicago Manual of Style (16^th Edition):

Orchini, Alessandro. “Modelling and analysis of nonlinear thermoacoustic systems using frequency and time domain methods.” 2017. Doctoral Dissertation, University of Cambridge. Accessed January 25, 2021. https://www.repository.cam.ac.uk/handle/1810/263562https://www.repository.cam.ac.uk/bitstream/1810/263562/2/4f6ae966-5b7e-4bc0-9dcb-d94efbf46e92_confirmations.txt ; https://www.repository.cam.ac.uk/bitstream/1810/263562/3/license.txt ; https://www.repository.cam.ac.uk/bitstream/1810/263562/4/4f6ae966-5b7e-4bc0-9dcb-d94efbf46e92.zip ; https://www.repository.cam.ac.uk/bitstream/1810/263562/5/Orchini_Thesis.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/263562/6/Orchini_Thesis.pdf.jpg.

MLA Handbook (7^th Edition):

Orchini, Alessandro. “Modelling and analysis of nonlinear thermoacoustic systems using frequency and time domain methods.” 2017. Web. 25 Jan 2021.

Vancouver:

Orchini A. Modelling and analysis of nonlinear thermoacoustic systems using frequency and time domain methods. [Internet] [Doctoral dissertation]. University of Cambridge; 2017. [cited 2021 Jan 25]. Available from: https://www.repository.cam.ac.uk/handle/1810/263562https://www.repository.cam.ac.uk/bitstream/1810/263562/2/4f6ae966-5b7e-4bc0-9dcb-d94efbf46e92_confirmations.txt ; https://www.repository.cam.ac.uk/bitstream/1810/263562/3/license.txt ; https://www.repository.cam.ac.uk/bitstream/1810/263562/4/4f6ae966-5b7e-4bc0-9dcb-d94efbf46e92.zip ; https://www.repository.cam.ac.uk/bitstream/1810/263562/5/Orchini_Thesis.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/263562/6/Orchini_Thesis.pdf.jpg.

Council of Science Editors:

Orchini A. Modelling and analysis of nonlinear thermoacoustic systems using frequency and time domain methods. [Doctoral Dissertation]. University of Cambridge; 2017. Available from: https://www.repository.cam.ac.uk/handle/1810/263562https://www.repository.cam.ac.uk/bitstream/1810/263562/2/4f6ae966-5b7e-4bc0-9dcb-d94efbf46e92_confirmations.txt ; https://www.repository.cam.ac.uk/bitstream/1810/263562/3/license.txt ; https://www.repository.cam.ac.uk/bitstream/1810/263562/4/4f6ae966-5b7e-4bc0-9dcb-d94efbf46e92.zip ; https://www.repository.cam.ac.uk/bitstream/1810/263562/5/Orchini_Thesis.pdf.txt ; https://www.repository.cam.ac.uk/bitstream/1810/263562/6/Orchini_Thesis.pdf.jpg

Delft University of Technology

8. Heinen, Kars (author). Frequency analysis of reset systems containing a Clegg integrator: An introduction to higher order sinusoidal input describing functions.

Degree: 2018, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:ccc37af2-fcbc-46ec-9297-afdc5c1ea4b5

►

PID is the most popular controller in the industry. PID controllers are linear, and thus have fundamental limitations, such that certain performance criteria cannot be… (more)

Subjects/Keywords: reset control; higher order describing function; clegg integrator

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

APA (6^th Edition):

Heinen, K. (. (2018). Frequency analysis of reset systems containing a Clegg integrator: An introduction to higher order sinusoidal input describing functions. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:ccc37af2-fcbc-46ec-9297-afdc5c1ea4b5

Chicago Manual of Style (16^th Edition):

Heinen, Kars (author). “Frequency analysis of reset systems containing a Clegg integrator: An introduction to higher order sinusoidal input describing functions.” 2018. Masters Thesis, Delft University of Technology. Accessed January 25, 2021. http://resolver.tudelft.nl/uuid:ccc37af2-fcbc-46ec-9297-afdc5c1ea4b5.

MLA Handbook (7^th Edition):

Heinen, Kars (author). “Frequency analysis of reset systems containing a Clegg integrator: An introduction to higher order sinusoidal input describing functions.” 2018. Web. 25 Jan 2021.

Vancouver:

Heinen K(. Frequency analysis of reset systems containing a Clegg integrator: An introduction to higher order sinusoidal input describing functions. [Internet] [Masters thesis]. Delft University of Technology; 2018. [cited 2021 Jan 25]. Available from: http://resolver.tudelft.nl/uuid:ccc37af2-fcbc-46ec-9297-afdc5c1ea4b5.

Council of Science Editors:

Heinen K(. Frequency analysis of reset systems containing a Clegg integrator: An introduction to higher order sinusoidal input describing functions. [Masters Thesis]. Delft University of Technology; 2018. Available from: http://resolver.tudelft.nl/uuid:ccc37af2-fcbc-46ec-9297-afdc5c1ea4b5

Delft University of Technology

9. Hou, Xiaojun (author). Tuning of the ‘Constant in gain Lead in phase’ Element for Mass-like Systems.

Degree: 2019, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:ef3007d4-36e9-498c-886a-f31ff7549381

►

The development of the high-tech industry has pushed the requirements of motion applications to extremes regarding precision, speed and robustness. A clear example is given… (more)

▼

The development of the high-tech industry has pushed the requirements of motion applications to extremes regarding precision, speed and robustness. A clear example is given by the wafer and reticle stages that require rigorous demands like robust nanometer precision and high-speed motion profiles to ensure product quality and production efficiency. Industrial workhorse Proportional Integral Derivative (PID) has been widely used for its simple implementation and good performance. However, PID is insufficient to meet the ever-increasing demands in the high-tech industry due to its inherent constraints of linear controllers such as the waterbed effect. To overcome these fundamental limitations, researchers have turned to nonlinear controllers. Nevertheless, most of the nonlinear controllers are difficult to design and implement and thus are not widely accepted in the industry. Reset control is a nonlinear controller that is easy to implement and design since it maintains compatibility with the PID loop shaping technique using a pseudo-linear analysis tool named describing function method. However, the reset control as a nonlinear controller also introduces high order harmonics to the system that can negatively affect system performance by causing unwanted dynamics. Hence, describing function analysis as a linear approximation approach that only considers first harmonics is not accurate enough. Recently, a theory to analyze high order harmonics of nonlinear system in frequency domain termed higher order sinusoidal describing function has been developed, which enables the possibility to perform more precise analysis on reset systems. The majority of research on reset control has focused on the phase lag reduction but a novel reset element proposed in literature termed ”Constant in gain, Lead in phase” (CgLp) is used to provide broadband phase compensation and has been shown to improve system performance. However, there is no systematic designing and tuning approach in literature such that the full advantage of CgLp elements is extracted. This work focuses on the tuning of the CgLp elements in order to obtain optimal performance. High order harmonics are also considered in the tuning analysis since they are critical to system performance due to the effect of unwanted dynamics. When a group of CgLp elements are designed to provide pre-determined phase compensation at the crossover frequency, it is seen that the optimal tracking precision performance is always obtained with the case that has the highest frequency of third order harmonic peak and has almost the smallest magnitude of high order harmonics at low frequencies. Moreover, the second order CgLp controllers are observed to outperform the first order CgLp controller regarding tracking precision. On the other hand, configurations that have the lowest magnitude of third order harmonic at high frequency are found to have the best noise attenuation performance.

Mechanical Engineering | Mechatronic System Design (MSD)

Advisors/Committee Members: Ahmadi Dastjerdi, Ali (mentor), Saikumar, Niranjan (graduation committee), Hossein Nia Kani, Hassan (mentor), Herder, Just (graduation committee), Delft University of Technology (degree granting institution).

Subjects/Keywords: Reset control; Motion Control; describing function analysis; HOSIDF; CgLp

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

APA (6^th Edition):

Hou, X. (. (2019). Tuning of the ‘Constant in gain Lead in phase’ Element for Mass-like Systems. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:ef3007d4-36e9-498c-886a-f31ff7549381

Chicago Manual of Style (16^th Edition):

Hou, Xiaojun (author). “Tuning of the ‘Constant in gain Lead in phase’ Element for Mass-like Systems.” 2019. Masters Thesis, Delft University of Technology. Accessed January 25, 2021. http://resolver.tudelft.nl/uuid:ef3007d4-36e9-498c-886a-f31ff7549381.

MLA Handbook (7^th Edition):

Hou, Xiaojun (author). “Tuning of the ‘Constant in gain Lead in phase’ Element for Mass-like Systems.” 2019. Web. 25 Jan 2021.

Vancouver:

Hou X(. Tuning of the ‘Constant in gain Lead in phase’ Element for Mass-like Systems. [Internet] [Masters thesis]. Delft University of Technology; 2019. [cited 2021 Jan 25]. Available from: http://resolver.tudelft.nl/uuid:ef3007d4-36e9-498c-886a-f31ff7549381.

Council of Science Editors:

Hou X(. Tuning of the ‘Constant in gain Lead in phase’ Element for Mass-like Systems. [Masters Thesis]. Delft University of Technology; 2019. Available from: http://resolver.tudelft.nl/uuid:ef3007d4-36e9-498c-886a-f31ff7549381

Delft University of Technology

10. Salman, Yusuf (author). Tuning a Novel Reset Element through Describing Function and HOSIDF Analysis.

Degree: 2018, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:2236e1f6-4dc5-4f7f-96da-fc83ead69445

►

The high-tech industry is pushing the motion system technology towards faster, more precise and more robust system. One of the keys to this growing demand… (more)

▼

The high-tech industry is pushing the motion system technology towards faster, more precise and more robust system. One of the keys to this growing demand is the advancement of motion control. To this day, Proportional-Integral-Derivative (PID) has been the workhorse for the industry system control. This is because PID is simple to design and implement and adapt to industrial loopshaping method. Nevertheless, PID suffers fundamental limitations of linear control. To deal with this, a nonlinear control should be utilized. Reset control is a nonlinear control that is still easy but can overcome the limitation of linear control and more importantly, loop shaping method can be used to reset control by using describing function analysis which is pseudo-approximation of nonlinear system that based on the first harmonic. However, reset control also introduces higher order harmonics into the system that can negatively affect system performance. This is because these harmonics may cause some unwanted dynamics present in system response. Describing function which is the common tool to analyze and design reset control is not accurate enough since higher order harmonics are not considered. Recently, a tool to visualize higher order harmonics in frequency domain is developed. This open the possibilities to study the behavior of higher order harmonics and its effect to system performance. This thesis focuses on a performance analysis and tuning of a novel reset element called ’Constant in Gain, Lead in Phase’(CgLp). It is shown by the literature that reset control is often utilized to provide phase lag reduction but CgLp has shown the use of reset control to provide phase compensation and this improves system performance. Since its introduction, no guidelines available in the literature to design and tune CgLp. Looking at its potential to be industry standard for motion control, finding guidelines to tune CgLp is an important step to achieve this goal. To do the optimal tuning of reset element, higher order harmonics should be considered so that the effect of unwanted response can be minimized while maintaining the advantage of reset control. Therefore, the work in this thesis is performed by doing performance analysis of CgLp through describing function and HOSIDF. It is shown that while there is an improvement in tracking and steady state precision performance by using CgLp compared to normal PID, there is deterioration of the performance although describing function predicted an improvement. This is because there is a trade-off between improvement by CgLp and the rise of higher order harmonics gain. In this work, the higher order harmonics was considered at the bandwidth frequency and normalized over its first harmonic. It was observed that the optimal performance is achieved when the highest gain value of normalized 3rd harmonic is around half of maximum possible value of normalized 3rd harmonic.

Mechanical Engineering

Advisors/Committee Members: Hossein Nia Kani, Hassan (mentor), Saikumar, Niranjan (mentor), Spronck, Jo (graduation committee), Goosen, Hans (graduation committee), Delft University of Technology (degree granting institution).

Subjects/Keywords: Reset control; precision control; Motion control; describing function analysis; HOSIDF

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

APA (6^th Edition):

Salman, Y. (. (2018). Tuning a Novel Reset Element through Describing Function and HOSIDF Analysis. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:2236e1f6-4dc5-4f7f-96da-fc83ead69445

Chicago Manual of Style (16^th Edition):

Salman, Yusuf (author). “Tuning a Novel Reset Element through Describing Function and HOSIDF Analysis.” 2018. Masters Thesis, Delft University of Technology. Accessed January 25, 2021. http://resolver.tudelft.nl/uuid:2236e1f6-4dc5-4f7f-96da-fc83ead69445.

MLA Handbook (7^th Edition):

Salman, Yusuf (author). “Tuning a Novel Reset Element through Describing Function and HOSIDF Analysis.” 2018. Web. 25 Jan 2021.

Vancouver:

Salman Y(. Tuning a Novel Reset Element through Describing Function and HOSIDF Analysis. [Internet] [Masters thesis]. Delft University of Technology; 2018. [cited 2021 Jan 25]. Available from: http://resolver.tudelft.nl/uuid:2236e1f6-4dc5-4f7f-96da-fc83ead69445.

Council of Science Editors:

Salman Y(. Tuning a Novel Reset Element through Describing Function and HOSIDF Analysis. [Masters Thesis]. Delft University of Technology; 2018. Available from: http://resolver.tudelft.nl/uuid:2236e1f6-4dc5-4f7f-96da-fc83ead69445

Universidade do Rio Grande do Norte

11. Cerqueira, Auciomar Carlos Teixeira de. Estimação e compensação de não linearidades inerentes aos atuadores dos processos industriais .

Degree: 2009, Universidade do Rio Grande do Norte

URL: http://repositorio.ufrn.br/handle/123456789/12916

► The oscillations presents in control loops can cause damages in petrochemical industry. Canceling, or even preventing such oscillations, would save up to large amount of… (more)

Subjects/Keywords: Estimação de parâmetros; compensação inversa; não linearidade; zona- morta; folga; modelo de hammerstein; função descritiva; parameters estimation; nonlinearity; inverse compensation; dead-zone; backlash; hammerstein model; describing function

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

APA (6^th Edition):

Cerqueira, A. C. T. d. (2009). Estimação e compensação de não linearidades inerentes aos atuadores dos processos industriais . (Masters Thesis). Universidade do Rio Grande do Norte. Retrieved from http://repositorio.ufrn.br/handle/123456789/12916

Chicago Manual of Style (16^th Edition):

Cerqueira, Auciomar Carlos Teixeira de. “Estimação e compensação de não linearidades inerentes aos atuadores dos processos industriais .” 2009. Masters Thesis, Universidade do Rio Grande do Norte. Accessed January 25, 2021. http://repositorio.ufrn.br/handle/123456789/12916.

MLA Handbook (7^th Edition):

Cerqueira, Auciomar Carlos Teixeira de. “Estimação e compensação de não linearidades inerentes aos atuadores dos processos industriais .” 2009. Web. 25 Jan 2021.

Vancouver:

Cerqueira ACTd. Estimação e compensação de não linearidades inerentes aos atuadores dos processos industriais . [Internet] [Masters thesis]. Universidade do Rio Grande do Norte; 2009. [cited 2021 Jan 25]. Available from: http://repositorio.ufrn.br/handle/123456789/12916.

Council of Science Editors:

Cerqueira ACTd. Estimação e compensação de não linearidades inerentes aos atuadores dos processos industriais . [Masters Thesis]. Universidade do Rio Grande do Norte; 2009. Available from: http://repositorio.ufrn.br/handle/123456789/12916

12. Boudy, Frédéric. Analyse de la dynamique non-linéaire et du contrôle des instabilités de combustion fondée sur la "Flame Describing Function" (FDF) : Nonlinear dynamics and control analysis of combustion instabilities based on the “Flame Describing Function” (FDF).

Degree: Docteur es, Energétique, 2012, Châtenay-Malabry, Ecole centrale de Paris

URL: http://www.theses.fr/2012ECAP0056

► Cette thèse se concentre sur l’étude des instabilités de combustion dans un brûleur prémélangé. Les instabilités sont généralement issues d’un couplage entre la combustion et… (more)

▼ Cette thèse se concentre sur l’étude des instabilités de combustion dans un brûleur prémélangé. Les instabilités sont généralement issues d’un couplage entre la combustion et les modes propres du système. La mise en résonance qui en résulte peut avoir des conséquences qui sont souvent dommageables, entraînant des vibrations, une fatigue des matériaux soumis à des charges acoustiques élevées et une intensification des flux de chaleur vers les parois de la chambre. Un premier objectif de cette thèse est de poursuivre le développement de méthodes de prévision des instabilités et des phénomènes non-linéaires qui en résultent comme par exemple le développement de cycles limites, les processus de déclenchement (“triggering”), la commutation de modes. Le cadre général adopté est celui de «°l’équivalent harmonique » bien connu dans le domaine du contrôle et qui a été exploré dans le domaine des instabilités de combustion dans des travaux récents du laboratoire EM2C, CNRS. Par le biais de ce concept il est possible de tenir compte de l’´evolution de la réponse de la flamme suivant l’amplitude à laquelle elle est soumise. Cette réponse de flamme en fréquence et amplitude généralise la notion de fonction de transfert et elle est désignée sous le nom de “Flame Describing Function” (FDF). Le système est ouvert à son extrémité aval. Cette géométrie permet de simplifier l’analyse et d’obtenir une large gamme de configurations au moyen d’une variation continue de la longueur du conduit d’alimentation qui est limité en amont par un piston. On peut aussi échanger le tube à flamme et utiliser des longueurs différentes de cet élément. Une étude exhaustive est réalisée pour répertorier les oscillations observées et déduire leurs propriétés. On montre que les cycles limites qui possèdent une amplitude constante sont bien décrits par la méthode unifiée fondée sur la FDF. Pour certaines configurations l’expérience fait apparaître des cycles limites dont l’amplitude et la fréquence ne se stabilisent pas au cours du temps. On observe notamment des oscillations plus complexes couplées par plusieurs modes pouvant soit donner lieu à des variations régulières ou à des fluctuations plus irrégulières avec un caractère “galopant” dans le temps. Pour ces oscillations particulières, la FDF fournit des indications sur les domaines d’apparition mais n’est pas en mesure de décrire complètement ces cycles limites complexes. Il faut dans ce cas recourir à une représentation temporelle qui n’est pas développée dans ce document. La base de données expérimentales pourra être utilisée pour guider ultérieurement ce type d’analyse. Le deuxième grand objectif de cette thèse est de rechercher des méthodes de contrôle des instabilités. On considère plus particulièrement des systèmes dynamiques utilisant des plaques perforées polarisées par un écoulement (BFP : “bias flow perforate”). Ces systèmes sont particulièrement intéressants pour atténuer les oscillations basse fréquence qui sont difficiles à réduire par des systèmes passifs. La conception de ces BFPs est… Advisors/Committee Members: Candel, Sébastien (thesis director).

Subjects/Keywords: Instabilités de combustion; Couplage thermoacoustique; Cycle limite stable; Combustion instabilities; Thermoacoustic coupling; Flame Describing Function

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

APA (6^th Edition):

Boudy, F. (2012). Analyse de la dynamique non-linéaire et du contrôle des instabilités de combustion fondée sur la "Flame Describing Function" (FDF) : Nonlinear dynamics and control analysis of combustion instabilities based on the “Flame Describing Function” (FDF). (Doctoral Dissertation). Châtenay-Malabry, Ecole centrale de Paris. Retrieved from http://www.theses.fr/2012ECAP0056

Chicago Manual of Style (16^th Edition):

Boudy, Frédéric. “Analyse de la dynamique non-linéaire et du contrôle des instabilités de combustion fondée sur la "Flame Describing Function" (FDF) : Nonlinear dynamics and control analysis of combustion instabilities based on the “Flame Describing Function” (FDF).” 2012. Doctoral Dissertation, Châtenay-Malabry, Ecole centrale de Paris. Accessed January 25, 2021. http://www.theses.fr/2012ECAP0056.

MLA Handbook (7^th Edition):

Boudy, Frédéric. “Analyse de la dynamique non-linéaire et du contrôle des instabilités de combustion fondée sur la "Flame Describing Function" (FDF) : Nonlinear dynamics and control analysis of combustion instabilities based on the “Flame Describing Function” (FDF).” 2012. Web. 25 Jan 2021.

Vancouver:

Boudy F. Analyse de la dynamique non-linéaire et du contrôle des instabilités de combustion fondée sur la "Flame Describing Function" (FDF) : Nonlinear dynamics and control analysis of combustion instabilities based on the “Flame Describing Function” (FDF). [Internet] [Doctoral dissertation]. Châtenay-Malabry, Ecole centrale de Paris; 2012. [cited 2021 Jan 25]. Available from: http://www.theses.fr/2012ECAP0056.

Council of Science Editors:

Boudy F. Analyse de la dynamique non-linéaire et du contrôle des instabilités de combustion fondée sur la "Flame Describing Function" (FDF) : Nonlinear dynamics and control analysis of combustion instabilities based on the “Flame Describing Function” (FDF). [Doctoral Dissertation]. Châtenay-Malabry, Ecole centrale de Paris; 2012. Available from: http://www.theses.fr/2012ECAP0056

13. Cankaya, Ilyas. Investigation of jump phenomenon on ship roll motion by generalized harmonic balance method.

Degree: PhD, 1998, University of Sussex

URL: https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.263151

Subjects/Keywords: 629.8; Volterra series; Truncation; Describing function

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

APA (6^th Edition):

Cankaya, I. (1998). Investigation of jump phenomenon on ship roll motion by generalized harmonic balance method. (Doctoral Dissertation). University of Sussex. Retrieved from https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.263151

Chicago Manual of Style (16^th Edition):

Cankaya, Ilyas. “Investigation of jump phenomenon on ship roll motion by generalized harmonic balance method.” 1998. Doctoral Dissertation, University of Sussex. Accessed January 25, 2021. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.263151.

MLA Handbook (7^th Edition):

Cankaya, Ilyas. “Investigation of jump phenomenon on ship roll motion by generalized harmonic balance method.” 1998. Web. 25 Jan 2021.

Vancouver:

Cankaya I. Investigation of jump phenomenon on ship roll motion by generalized harmonic balance method. [Internet] [Doctoral dissertation]. University of Sussex; 1998. [cited 2021 Jan 25]. Available from: https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.263151.

Council of Science Editors:

Cankaya I. Investigation of jump phenomenon on ship roll motion by generalized harmonic balance method. [Doctoral Dissertation]. University of Sussex; 1998. Available from: https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.263151

Delft University of Technology

14. Nagda, Neel (author). Variable Fractional Order (VFO) PID Control for Precision Positioning: A Frequency Domain Approach.

Degree: 2019, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:99998698-7287-47e9-acd0-9d7cc1d78670

►

Stringent control demands from the high-tech mechatronics industry have warranted the need to explore potentially advantageous non-linear controllers. Variable Fractional Order (VFO) calculus provides one… (more)

Subjects/Keywords: PID; Variable Fractional Order calculus; Describing Function analysis; SIDF; HOSIDFs; Precision positioning

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

APA (6^th Edition):

Nagda, N. (. (2019). Variable Fractional Order (VFO) PID Control for Precision Positioning: A Frequency Domain Approach. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:99998698-7287-47e9-acd0-9d7cc1d78670

Chicago Manual of Style (16^th Edition):

Nagda, Neel (author). “Variable Fractional Order (VFO) PID Control for Precision Positioning: A Frequency Domain Approach.” 2019. Masters Thesis, Delft University of Technology. Accessed January 25, 2021. http://resolver.tudelft.nl/uuid:99998698-7287-47e9-acd0-9d7cc1d78670.

MLA Handbook (7^th Edition):

Nagda, Neel (author). “Variable Fractional Order (VFO) PID Control for Precision Positioning: A Frequency Domain Approach.” 2019. Web. 25 Jan 2021.

Vancouver:

Nagda N(. Variable Fractional Order (VFO) PID Control for Precision Positioning: A Frequency Domain Approach. [Internet] [Masters thesis]. Delft University of Technology; 2019. [cited 2021 Jan 25]. Available from: http://resolver.tudelft.nl/uuid:99998698-7287-47e9-acd0-9d7cc1d78670.

Council of Science Editors:

Nagda N(. Variable Fractional Order (VFO) PID Control for Precision Positioning: A Frequency Domain Approach. [Masters Thesis]. Delft University of Technology; 2019. Available from: http://resolver.tudelft.nl/uuid:99998698-7287-47e9-acd0-9d7cc1d78670

Delft University of Technology

15. Chen, Linda (author). Development of CRONE reset control.

Degree: 2017, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:5370c610-4112-49e9-b860-9d625d5b40c5

► In high-tech industry (sub)nanometre precision motion control is essential. For example wafer scanners, used for production of integrated circuits, have to provide (sub)nanometre precision positioning… (more)

▼ In high-tech industry (sub)nanometre precision motion control is essential. For example wafer scanners, used for production of integrated circuits, have to provide (sub)nanometre precision positioning whilst satisfying challenging requirements on speed at the same time. It is in demanding cases like this that different requirements begin to conflict with each other. A fundamental trade-off between robustness and performance exists as an inevitable result of the waterbed effect in linear control. PID controllers, which have been an industry-standard for many years, do not satisfy the ever increasing demands. In this MSc thesis a novel reset control synthesis method is proposed: CRONE reset control, which combines a robust fractional CRONE controller (Commande Robuste d’Ordre Non-Entier) with non-linear reset control to overcome waterbed effect. In CRONE control, robustness is achieved against gain deviations by creation of constant phase behaviour around bandwidth with the use of fractional operators. The use of fractional operators also introduces more freedom in shaping the open- loop frequency response, allowing fractional factors in Bode’s gain-phase relation. However, waterbed effect remains, which motivates introduction of non-linear reset control in the CRONE design. In reset control, controller states are reset when the error between output- and reference- signal is zero. In frequency domain, using describing function analysis it is predicted that reset filters generate less phase lag for similar gain behaviour. For instance, a reset integrator gives a phase lag of about 38 degrees, which is 52 degrees less compared to the linear integrator. This allows for relief from Bode’s gain-phase relation, breaking aforementioned trade-offs. In the new controller design, reset phase advantage is approximated using describing function analysis and used to achieve better open-loop shape. New design rules for CRONE reset control have been developed in this thesis. Three different reset control strategies have been investigated: integrator reset, lag reset and lead- lag/lag-lead reset. For these controllers, a two-degree-of-freedom non-linearity tuning CRONE reset control structure has been developed. This control structure has been implemented digitally within a MATLAB/Simulink environment on a Lorentz-actuated (dual) precision stage via a real-time dSPACE DS1103 controller interface. For the implemented controllers sufficient quadratic stability has been shown using the Hβ-condition. It has been shown that simulated frequency responses using describing function correspond well to experimental identified frequency responses. Moreover, frequency domain measurements have shown that better performance for CRONE reset control can be achieved for same phase margin compared to linear CRONE. Relief from both waterbed effect and Bode’s gain-phase relation has been accomplished. Furthermore, for the same bandwidth, average noise reduction between 1.79dB and 3.93dB has been attained at a number of distinct… Advisors/Committee Members: Saikumar, Niranjan (mentor), Hossein Nia Kani, Hassan (mentor), Baldi, Simone (mentor), van Wingerden, Jan-Willem (graduation committee), Delft University of Technology (degree granting institution).

Subjects/Keywords: reset control; describing function analysis; loop shaping; fractional order control; CRONE; robust control; precision positioning

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

APA (6^th Edition):

Chen, L. (. (2017). Development of CRONE reset control. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:5370c610-4112-49e9-b860-9d625d5b40c5

Chicago Manual of Style (16^th Edition):

Chen, Linda (author). “Development of CRONE reset control.” 2017. Masters Thesis, Delft University of Technology. Accessed January 25, 2021. http://resolver.tudelft.nl/uuid:5370c610-4112-49e9-b860-9d625d5b40c5.

MLA Handbook (7^th Edition):

Chen, Linda (author). “Development of CRONE reset control.” 2017. Web. 25 Jan 2021.

Vancouver:

Chen L(. Development of CRONE reset control. [Internet] [Masters thesis]. Delft University of Technology; 2017. [cited 2021 Jan 25]. Available from: http://resolver.tudelft.nl/uuid:5370c610-4112-49e9-b860-9d625d5b40c5.

Council of Science Editors:

Chen L(. Development of CRONE reset control. [Masters Thesis]. Delft University of Technology; 2017. Available from: http://resolver.tudelft.nl/uuid:5370c610-4112-49e9-b860-9d625d5b40c5

Virginia Tech

16. Yu, Feng. Modeling of V2 Control with Composite Capacitors and Average Current Mode Control.

Degree: MS, Electrical and Computer Engineering, 2011, Virginia Tech

URL: http://hdl.handle.net/10919/33458

► Various types of current mode control are being used in different applications. Model for current mode control is indispensable for proper system design. Since 1980s,… (more)

▼ Various types of current mode control are being used in different applications. Model for current mode control is indispensable for proper system design. Since 1980s, modeling of current mode control has been a hot topic in power electronics field. In current mode control, sub-harmonic oscillation is a common issue, especially for constant frequency current mode control: like peak current mode control, valley current mode control, or average current mode control. Recently V2 control is becoming more and more popular due to its simple implementation ad super fast transient response. V2 control can also run into sub-harmonic oscillation just as current mode control. Efforts have been devoted to modeling of V2 control. A common property of different types of current mode control and V2 control is that they are all multi-loop structures and the inner loops are all highly nonlinear. Due to the nonlinearity of the inner loops, modeling of these structures is extremely difficult. Up to now, there are two main problems which havenâ t been solved: 1. modeling of average current mode control; 2. modeling of V2 control with composite capacitors. This thesis tries to solve these two problems and starts with V2 control. For V2 control with single type of bulk capacitors, an accurate model has been proposed previously. In this thesis, an equivalent circuit model is proposed to get better physical understanding. This method makes use of previous current mode control modeling result and relates V2 control with current mode control. To model V2 control with composite capacitors, capacitor currents and output voltage time domain waveforms are analyzed. Based on describing function method, transfer function from control to output is derived. The modeling result shows that with more parallel ceramic capacitors, system has smaller stability margin. For average current mode control, the structure is compared with V2 control. Similarity between the structures of current compensator in average current mode and output capacitor network in V2 control is identified. V2 model is utilized for average current mode control. The modeling derivation process is simplified. For the current compensator in average current mode control, it is not desired to have a high frequency pole from stability point of view. As a conclusion, a circuit model for V2 control with bulk capacitors is proposed and another two problems are examined: modeling of V2 control with composite capacitors and modeling of average current mode control. It has been demonstrated that there is similarity between these two structures. The modeling results are verified through simulation and experiments. Advisors/Committee Members: Lee, Fred C. (committeechair), Boroyevich, Dushan (committee member), Mattavelli, Paolo (committee member).

Subjects/Keywords: average current mode control; modeling; describing function; V2 Control; ripple based control; composite capacitors

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

APA (6^th Edition):

Yu, F. (2011). Modeling of V2 Control with Composite Capacitors and Average Current Mode Control. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/33458

Chicago Manual of Style (16^th Edition):

Yu, Feng. “Modeling of V2 Control with Composite Capacitors and Average Current Mode Control.” 2011. Masters Thesis, Virginia Tech. Accessed January 25, 2021. http://hdl.handle.net/10919/33458.

MLA Handbook (7^th Edition):

Yu, Feng. “Modeling of V2 Control with Composite Capacitors and Average Current Mode Control.” 2011. Web. 25 Jan 2021.

Vancouver:

Yu F. Modeling of V2 Control with Composite Capacitors and Average Current Mode Control. [Internet] [Masters thesis]. Virginia Tech; 2011. [cited 2021 Jan 25]. Available from: http://hdl.handle.net/10919/33458.

Council of Science Editors:

Yu F. Modeling of V2 Control with Composite Capacitors and Average Current Mode Control. [Masters Thesis]. Virginia Tech; 2011. Available from: http://hdl.handle.net/10919/33458

Pontifical Catholic University of Rio de Janeiro

17. HUMBERTO GULLO DE BARROS. [en] TRIGONOMETRY: ANGLE ADDITION FORMULAS.

Degree: 2015, Pontifical Catholic University of Rio de Janeiro

URL: http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=24026

►

[pt] Trata-se de uma proposta que visa orientar o professor de Matemática do Ensino Médio em relação às dificuldades encontradas no ensino-aprendizagem da Trigonometria. Mais… (more)

Subjects/Keywords: [pt] FUNCAO SINUSOIDAL; [en] SINUSOIDAL FUNCTION; [pt] TRIGONOMETRIA; [en] TRIGONOMETRIA; [pt] SENO; [en] SINE; [pt] ADICAO DE ARCOS; [en] ADDING ARCS

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

APA (6^th Edition):

BARROS, H. G. D. (2015). [en] TRIGONOMETRY: ANGLE ADDITION FORMULAS. (Thesis). Pontifical Catholic University of Rio de Janeiro. Retrieved from http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=24026

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

BARROS, HUMBERTO GULLO DE. “[en] TRIGONOMETRY: ANGLE ADDITION FORMULAS.” 2015. Thesis, Pontifical Catholic University of Rio de Janeiro. Accessed January 25, 2021. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=24026.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

BARROS, HUMBERTO GULLO DE. “[en] TRIGONOMETRY: ANGLE ADDITION FORMULAS.” 2015. Web. 25 Jan 2021.

Vancouver:

BARROS HGD. [en] TRIGONOMETRY: ANGLE ADDITION FORMULAS. [Internet] [Thesis]. Pontifical Catholic University of Rio de Janeiro; 2015. [cited 2021 Jan 25]. Available from: http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=24026.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

BARROS HGD. [en] TRIGONOMETRY: ANGLE ADDITION FORMULAS. [Thesis]. Pontifical Catholic University of Rio de Janeiro; 2015. Available from: http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=24026

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Utah

18. Fluckiger, Jacob U. Absolute quantification of pharmacokinetic parameters in dynamic contrast enhanced magnetic resonance imaging.

Degree: PhD, Bioengineering, 2011, University of Utah

URL: http://content.lib.utah.edu/cdm/singleitem/collection/etd3/id/556/rec/123

► We present a method for absolutely quantifying pharmacokinetic parameters in dynamic contrast-enhanced (DCE)-MRI. This method, known as alternating mini-mization with model (AMM), involves jointly estimating… (more)

▼ We present a method for absolutely quantifying pharmacokinetic parameters in dynamic contrast-enhanced (DCE)-MRI. This method, known as alternating mini-mization with model (AMM), involves jointly estimating the arterial input function (AIF) and pharmacokinetic parameters from a characteristic set of measured tissue concentration curves. By blindly estimating the AIF, problems associated with AIF measurement in pharmacokinetic modeling, such as signal saturation, flow and partial volume eff ects, and small arterial lumens can be ignored. The blind estimation method described here introduces a novel functional form for the AIF, which serves to simplify the estimation process and reduce the deleterious e ffects of noise on the deconvolution process. Computer simulations were undertaken to assess the performance of the estimation process as a function of the input tissue curves. A con fidence metric for the estimation quality, based on a linear combination of the SNR and diversity of the input curves, is presented. This con fidence metric is then used to allow for localizing the region from which input curves are drawn. Local blood supply to any particular region can then be blindly estimated, along with some measure of con fidence for that estimation. Methods for evaluating the utility of the blind estimation algorithm on clinical data are presented, along with preliminary results on quantifying tissue parameters in soft-tissue sarcomas. The AMM method is applied to in vivo data from both cardiac perfusion and breast cancer scans. The cardiac scans were conducted using a dual-bolus protocol, which provides a measure of truth for the AIF. Twenty data sets were processed with this method, and pharmacokinetic parameter values derived from the blind AIF were compared with those derived from the dual-bolus measured AIF. For seventeen of the twenty datasets there were no statistically signifi cant differences in Ktrans estimates. The cardiac AMM method presented here provides a way to quantify perfusion of myocardial tissue with a single injection of contrast agent and without a special pulse sequence. The resulting parameters are similar to those given by the dual bolus method. The breast cancer scans were processed with the AMM method and the results were compared to an analysis done with the semiquantitative DCE-MRI scans. The e ffects of the temporal sampling rate of the data on the AMM method are examined. The ability of the AMM-derived parameters to distinguish benign and malignant tumors is compared to more conventional methods.

Subjects/Keywords: Arterial input function; Blind estimation; DCE-MRI

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APA (6^th Edition):

Fluckiger, J. U. (2011). Absolute quantification of pharmacokinetic parameters in dynamic contrast enhanced magnetic resonance imaging. (Doctoral Dissertation). University of Utah. Retrieved from http://content.lib.utah.edu/cdm/singleitem/collection/etd3/id/556/rec/123

Chicago Manual of Style (16^th Edition):

Fluckiger, Jacob U. “Absolute quantification of pharmacokinetic parameters in dynamic contrast enhanced magnetic resonance imaging.” 2011. Doctoral Dissertation, University of Utah. Accessed January 25, 2021. http://content.lib.utah.edu/cdm/singleitem/collection/etd3/id/556/rec/123.

MLA Handbook (7^th Edition):

Fluckiger, Jacob U. “Absolute quantification of pharmacokinetic parameters in dynamic contrast enhanced magnetic resonance imaging.” 2011. Web. 25 Jan 2021.

Vancouver:

Fluckiger JU. Absolute quantification of pharmacokinetic parameters in dynamic contrast enhanced magnetic resonance imaging. [Internet] [Doctoral dissertation]. University of Utah; 2011. [cited 2021 Jan 25]. Available from: http://content.lib.utah.edu/cdm/singleitem/collection/etd3/id/556/rec/123.

Council of Science Editors:

Fluckiger JU. Absolute quantification of pharmacokinetic parameters in dynamic contrast enhanced magnetic resonance imaging. [Doctoral Dissertation]. University of Utah; 2011. Available from: http://content.lib.utah.edu/cdm/singleitem/collection/etd3/id/556/rec/123

Delft University of Technology

19. Buitenhuis, R.N. (author). Frequency-Domain Modelling of Reset Control Systems using an Impulsive Description.

Degree: 2020, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:a048e431-4659-4ac5-816d-eeb9e0f654f8

►

The ever-increasing industry desire for improved performance makes linear controller design run into its fundamental limitations. A nonlinear controller, such as Reset Control (RC), is… (more)

Subjects/Keywords: Reset Control; Closed-Loop; Nonlinear Control; Impulsive Modelling; Describing Function; Frequency Domain; Precision Control; Mechatronics; Motion Control

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APA (6^th Edition):

Buitenhuis, R. N. (. (2020). Frequency-Domain Modelling of Reset Control Systems using an Impulsive Description. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:a048e431-4659-4ac5-816d-eeb9e0f654f8

Chicago Manual of Style (16^th Edition):

Buitenhuis, R N (author). “Frequency-Domain Modelling of Reset Control Systems using an Impulsive Description.” 2020. Masters Thesis, Delft University of Technology. Accessed January 25, 2021. http://resolver.tudelft.nl/uuid:a048e431-4659-4ac5-816d-eeb9e0f654f8.

MLA Handbook (7^th Edition):

Buitenhuis, R N (author). “Frequency-Domain Modelling of Reset Control Systems using an Impulsive Description.” 2020. Web. 25 Jan 2021.

Vancouver:

Buitenhuis RN(. Frequency-Domain Modelling of Reset Control Systems using an Impulsive Description. [Internet] [Masters thesis]. Delft University of Technology; 2020. [cited 2021 Jan 25]. Available from: http://resolver.tudelft.nl/uuid:a048e431-4659-4ac5-816d-eeb9e0f654f8.

Council of Science Editors:

Buitenhuis RN(. Frequency-Domain Modelling of Reset Control Systems using an Impulsive Description. [Masters Thesis]. Delft University of Technology; 2020. Available from: http://resolver.tudelft.nl/uuid:a048e431-4659-4ac5-816d-eeb9e0f654f8

Delft University of Technology

20. de Koster, Pascal (author). Towards a Material Point Method with Powell-Sabin spline basis functions: MPM with higher-order C1-continuous basis functions on triangulations.

Degree: 2018, Delft University of Technology

URL: http://resolver.tudelft.nl/uuid:60272428-bce1-4a11-8c8f-462912ad7066

►

The material point method (MPM) is a numerical method for simulating ground deformations, that combinesthe benefits of a fixed grid with movingmaterial points, which carry… (more)

▼

The material point method (MPM) is a numerical method for simulating ground deformations, that combinesthe benefits of a fixed grid with movingmaterial points, which carry the history dependent information of thecontinuum. During each time step, this information is projected to the grid, on which the equations of motionare solved and a corresponding acceleration field is constructed. Then, the material points undergo motioncorresponding to the acceleration field and the particle properties are updated accordingly. MPM uses a finiteelement method to solve the equations of motion over a triangular grid, but in current versions, the basisfunctions used are only piece-wise linear, which results in low-order spatial convergence for function reconstruction.Furthermore, the piece-wise linear basis functions have discontinuous first derivatives, which causeso called grid-crossing errors when amaterial point crosses between elements, where these discontinuities areoccur. To solve these problems for 2D MPM on a triangular grid, this study investigates the possibility to usehigher-order basis functions with the properties of C1-continuity and non-negativity. B-spline basis functionswould be very suitable for this purpose and earlier studies for 1D have already shown the potential of B-splineMPM. This thesis shows that it is also possible to use B-splines on a 2D triangular grid, which has led to the useof quadratic Powell-Sabin (PS) spline basis functions, which are piece-wise quadratic, C1-continuous, nonnegativebasis functions on triangulations. In this thesis, we have implemented these basis functions inMPMand investigated the performance of PS-spline MPM. Although Constructing and evaluating PS-splines hasproven more cumbersome than the piece-wise linear basis functions classically used in MPM, but PS-splineMPM shows higher-order spatial convergence for function reconstruction and completely erases grid crossingerrors. For these reasons, PS-splineMPM would be very suitable for application in engineering in which largenumbers of basis functions are necessary: due to the higher-order spatial convergence of PS-splineMPM, thenumber of required basis functions could be significantly reduced.Before implementation in engineering application can take place, however, two issues still appear in PSsplineMPM, which should be further researched. The first issue is that PS-spline MPM shows instabilitieswhen elements become nearly empty, as the mass matrix becomes ill-conditioned when this occurs. A way tomitigate this problems is by lumping the mass matrix, however, this leads to the second issue. When the massmatrix is lumped, the accuracy of the solution drops significantly, far more than when classical MPM withpiece-wise linear basis functions is lumped. If these issues are resolved in further research, PS-spline MPMmay prove very suitable for engineering applications.

Applied Mathematics

Advisors/Committee Members: Möller, Matthias (mentor), Galavi, Vahid (mentor), Tielen, Roel (mentor), Vuik, Kees (graduation committee), Delft University of Technology (degree granting institution).

Subjects/Keywords: Material Point Method; Powell-Sabin refinement; Triangulation; Finite Element Method; higher order describing function; grid crossing error

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

APA (6^th Edition):

de Koster, P. (. (2018). Towards a Material Point Method with Powell-Sabin spline basis functions: MPM with higher-order C1-continuous basis functions on triangulations. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:60272428-bce1-4a11-8c8f-462912ad7066

Chicago Manual of Style (16^th Edition):

de Koster, Pascal (author). “Towards a Material Point Method with Powell-Sabin spline basis functions: MPM with higher-order C1-continuous basis functions on triangulations.” 2018. Masters Thesis, Delft University of Technology. Accessed January 25, 2021. http://resolver.tudelft.nl/uuid:60272428-bce1-4a11-8c8f-462912ad7066.

MLA Handbook (7^th Edition):

de Koster, Pascal (author). “Towards a Material Point Method with Powell-Sabin spline basis functions: MPM with higher-order C1-continuous basis functions on triangulations.” 2018. Web. 25 Jan 2021.

Vancouver:

de Koster P(. Towards a Material Point Method with Powell-Sabin spline basis functions: MPM with higher-order C1-continuous basis functions on triangulations. [Internet] [Masters thesis]. Delft University of Technology; 2018. [cited 2021 Jan 25]. Available from: http://resolver.tudelft.nl/uuid:60272428-bce1-4a11-8c8f-462912ad7066.

Council of Science Editors:

de Koster P(. Towards a Material Point Method with Powell-Sabin spline basis functions: MPM with higher-order C1-continuous basis functions on triangulations. [Masters Thesis]. Delft University of Technology; 2018. Available from: http://resolver.tudelft.nl/uuid:60272428-bce1-4a11-8c8f-462912ad7066

Virginia Tech

21. Huang, Xinming. Development of Reduced-Order Flame Models for Prediction of Combustion Instability.

Degree: PhD, Electrical and Computer Engineering, 2001, Virginia Tech

URL: http://hdl.handle.net/10919/29763

► Lean-premixed combustion has the advantage of low emissions for modern gas turbines, but it is susceptible to thermoacoustic instabilities, which can result in large amplitude… (more)

Subjects/Keywords: limit cycle; combustion instability; reduced-order model; describing function

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APA (6^th Edition):

Huang, X. (2001). Development of Reduced-Order Flame Models for Prediction of Combustion Instability. (Doctoral Dissertation). Virginia Tech. Retrieved from http://hdl.handle.net/10919/29763

Chicago Manual of Style (16^th Edition):

Huang, Xinming. “Development of Reduced-Order Flame Models for Prediction of Combustion Instability.” 2001. Doctoral Dissertation, Virginia Tech. Accessed January 25, 2021. http://hdl.handle.net/10919/29763.

MLA Handbook (7^th Edition):

Huang, Xinming. “Development of Reduced-Order Flame Models for Prediction of Combustion Instability.” 2001. Web. 25 Jan 2021.

Vancouver:

Huang X. Development of Reduced-Order Flame Models for Prediction of Combustion Instability. [Internet] [Doctoral dissertation]. Virginia Tech; 2001. [cited 2021 Jan 25]. Available from: http://hdl.handle.net/10919/29763.

Council of Science Editors:

Huang X. Development of Reduced-Order Flame Models for Prediction of Combustion Instability. [Doctoral Dissertation]. Virginia Tech; 2001. Available from: http://hdl.handle.net/10919/29763

University of Waterloo

22. Maki, Erik. Iterated Function Systems with Place-Dependent Probabilities and the Inverse Problem of Measure Approximation Using Moments.

Degree: 2016, University of Waterloo

URL: http://hdl.handle.net/10012/11017

► The study of iterated function systems has close ties with the subject of fractal-based analysis. One important application is the approximation of a target object… (more)

Subjects/Keywords: Inverse Problem; Invariant Measures; Iterated Function Systems

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APA (6^th Edition):

Maki, E. (2016). Iterated Function Systems with Place-Dependent Probabilities and the Inverse Problem of Measure Approximation Using Moments. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/11017

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Maki, Erik. “Iterated Function Systems with Place-Dependent Probabilities and the Inverse Problem of Measure Approximation Using Moments.” 2016. Thesis, University of Waterloo. Accessed January 25, 2021. http://hdl.handle.net/10012/11017.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Maki, Erik. “Iterated Function Systems with Place-Dependent Probabilities and the Inverse Problem of Measure Approximation Using Moments.” 2016. Web. 25 Jan 2021.

Vancouver:

Maki E. Iterated Function Systems with Place-Dependent Probabilities and the Inverse Problem of Measure Approximation Using Moments. [Internet] [Thesis]. University of Waterloo; 2016. [cited 2021 Jan 25]. Available from: http://hdl.handle.net/10012/11017.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Maki E. Iterated Function Systems with Place-Dependent Probabilities and the Inverse Problem of Measure Approximation Using Moments. [Thesis]. University of Waterloo; 2016. Available from: http://hdl.handle.net/10012/11017

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Rochester Institute of Technology

23. Hertzmann, Peter. Design and Construction of Sinusoidal Targets for Resolving Power Cameras.

Degree: School of Photographic Arts and Sciences (CIAS), 1974, Rochester Institute of Technology

URL: https://scholarworks.rit.edu/theses/4820

None provided. Advisors/Committee Members: Abouelata, Mohamed.

Subjects/Keywords: Exposure; Frequency; Modulation transfer function; MTF; Sinusoidal

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APA (6^th Edition):

Hertzmann, P. (1974). Design and Construction of Sinusoidal Targets for Resolving Power Cameras. (Thesis). Rochester Institute of Technology. Retrieved from https://scholarworks.rit.edu/theses/4820

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Hertzmann, Peter. “Design and Construction of Sinusoidal Targets for Resolving Power Cameras.” 1974. Thesis, Rochester Institute of Technology. Accessed January 25, 2021. https://scholarworks.rit.edu/theses/4820.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Hertzmann, Peter. “Design and Construction of Sinusoidal Targets for Resolving Power Cameras.” 1974. Web. 25 Jan 2021.

Vancouver:

Hertzmann P. Design and Construction of Sinusoidal Targets for Resolving Power Cameras. [Internet] [Thesis]. Rochester Institute of Technology; 1974. [cited 2021 Jan 25]. Available from: https://scholarworks.rit.edu/theses/4820.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Hertzmann P. Design and Construction of Sinusoidal Targets for Resolving Power Cameras. [Thesis]. Rochester Institute of Technology; 1974. Available from: https://scholarworks.rit.edu/theses/4820

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

24. CHUA KOK YONG. Development of new approaches for tuning process controllers.

Degree: 2007, National University of Singapore

URL: http://scholarbank.nus.edu.sg/handle/10635/15662

Subjects/Keywords: preload relay; describing function; repetitive control; time-delay systems; Smith predictor; PID controller

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APA (6^th Edition):

YONG, C. K. (2007). Development of new approaches for tuning process controllers. (Thesis). National University of Singapore. Retrieved from http://scholarbank.nus.edu.sg/handle/10635/15662

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

YONG, CHUA KOK. “Development of new approaches for tuning process controllers.” 2007. Thesis, National University of Singapore. Accessed January 25, 2021. http://scholarbank.nus.edu.sg/handle/10635/15662.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

YONG, CHUA KOK. “Development of new approaches for tuning process controllers.” 2007. Web. 25 Jan 2021.

Vancouver:

YONG CK. Development of new approaches for tuning process controllers. [Internet] [Thesis]. National University of Singapore; 2007. [cited 2021 Jan 25]. Available from: http://scholarbank.nus.edu.sg/handle/10635/15662.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

YONG CK. Development of new approaches for tuning process controllers. [Thesis]. National University of Singapore; 2007. Available from: http://scholarbank.nus.edu.sg/handle/10635/15662

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Virginia Tech

25. Huang, Bin. Modeling and design of digital current-mode constant on-time control.

Degree: MS, Electrical and Computer Engineering, 2008, Virginia Tech

URL: http://hdl.handle.net/10919/31487

► This thesis presents the fundamental issues of the digital controlled DC/DC converter. A lot of challenges exist when you introduce the digital control technique into… (more)

▼ This thesis presents the fundamental issues of the digital controlled DC/DC converter. A lot of challenges exist when you introduce the digital control technique into the control of the DC/DC converter, especially with regards to the voltage regulator module. One issue is the limit cycle oscillation problem caused by the quantization effect from the ADC and DPWM of the digital control chip. Another issue is the delay problem coming from the sample-hold effect. In this thesis, the modeling, analysis and design methodology for the constant frequency voltage-mode control is reviewed. A DPWM (Digital Pulse Width Modulator) model is verified in simulation, which shows what effects the digital control brings to the conventional Pulse Width Modulator. In CPES, the constant on-time control concept is introduced into the digital control of the voltage regulator module. This provides a high resolution of DPWM and allows the digital constant on-time voltage-mode control architecture to be proposed. To limit the oscillation amplitude in the digital control structure, the digital constant on-time current-mode control w/ external ramp is further proposed in CPES. To analyze this structure, a describing function model is proposed for the digital constant on-time current-mode control, which takes both the sample-hold effect and the quantization effect into consideration. This model clearly shows the stability problem caused by the sample-hold effect in the current loop. Using larger rampâ s slope values, this stability issue can be alleviated. Based on this model, a design methodology is introduced. By properly designing the current loopâ s ADC resolution and the voltage loopâ s ADC resolution, the limit cycle oscillation in this structure can be minimized: the digital constant on-time current-mode control will only have the oscillation coming from the sample-hold effect in the current loop, which can be greatly reduced by adding the large slopeâ s external ramp to this structure. Simulation verification for this design methodology is provided to prove the concepts. Based on the proposed model, the compensator design is performed. The motivation for the compensator design is to push the bandwidth while satisfying the stability condition and the dynamic no-limit-cycle oscillation condition. When analyzing the case of one sample per switching cycle, there is a certain amount of delay, which compromises the phase characteristics. Our design also requires a large external ramp because it will reduce the oscillation amplitude in our system. From our model, it is quite obvious that the external ramp must have a slope larger than one time that of inductor current down slope. A slope that is too larger will weaker the phase and limit the bandwidth. When using the normal current-mode compensator, like the 1-pole 1-zero compensator, the phase is dropped too much and the bandwidth will be limited too low. If we use a 2-pole 2-zero compensator, the phase can be boosted. However, in this case, the gain margin requirement from the… Advisors/Committee Members: Lee, Fred C. (committeechair), Wang, Fei Fred (committee member), Xu, Ming (committee member).

Subjects/Keywords: digital current-mode control; constant on-time; quantization; describing function modeling

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

APA (6^th Edition):

Huang, B. (2008). Modeling and design of digital current-mode constant on-time control. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/31487

Chicago Manual of Style (16^th Edition):

Huang, Bin. “Modeling and design of digital current-mode constant on-time control.” 2008. Masters Thesis, Virginia Tech. Accessed January 25, 2021. http://hdl.handle.net/10919/31487.

MLA Handbook (7^th Edition):

Huang, Bin. “Modeling and design of digital current-mode constant on-time control.” 2008. Web. 25 Jan 2021.

Vancouver:

Huang B. Modeling and design of digital current-mode constant on-time control. [Internet] [Masters thesis]. Virginia Tech; 2008. [cited 2021 Jan 25]. Available from: http://hdl.handle.net/10919/31487.

Council of Science Editors:

Huang B. Modeling and design of digital current-mode constant on-time control. [Masters Thesis]. Virginia Tech; 2008. Available from: http://hdl.handle.net/10919/31487

Virginia Tech

26. Li, Jian. Current-Mode Control: Modeling and its Digital Application.

Degree: PhD, Electrical and Computer Engineering, 2009, Virginia Tech

URL: http://hdl.handle.net/10919/27019

► Due to unique characteristics, current-mode control architectures with different implementation approaches have been widely used in power converter design to achieve current sharing, AVP control,… (more)

▼ Due to unique characteristics, current-mode control architectures with different implementation approaches have been widely used in power converter design to achieve current sharing, AVP control, and light-load efficiency improvement. Therefore, an accurate model for current-mode control is indispensable to system design due to the existence of subharmonic oscillations. The fundamental difference between current-mode control and voltage-mode control is the PWM modulation. The inductor current, one of state variables, is used in the modulator in current-mode control while an external ramp is used in voltage-mode control. The dynamic nonlinearity of current-mode control results in the difficulty of obtaining the small-signal model for current-mode control in the frequency domain. There has been a long history of the current-mode control modeling. Many previous attempts have been made especially for constant-frequency peak current-mode control. However, few models are available for variable-frequency constant on-time control and V2 current-mode control. Itâ s hard to directly extend the model of peak current-mode control to those controls. Furthermore, there is no simple way of modeling the effects of the capacitor ripple which may result in subharmonic oscillations in V2 current-mode control. In this dissertation, the primary objective to investigate a new and general modeling approach for current-mode control with different implementation methods. First, the fundamental limitation of average models for current-mode control is identified. The sideband components are generated and coupled with the fundamental component through the PWM modulator in the current loop. Moreover, the switching frequency harmonics cannot be ignored in the current loop since the current ripple is used for the PWM modulation. Available average models failed to consider the sideband effects and high frequency harmonics. Due to the complexity of the current loop, it is difficult to analyze current loop in the frequency domain. A new modeling approach for current-mode control is proposed based on the time-domain analysis. The inductor, the switches and the PWM modulator are treated as a single entity to model instead of breaking them into parts to do it. Describing function method is used. Proposed approach can be applied not only to constant-frequency modulation but also to variable-frequency modulation. The fundamental difference between different current-mode controls is elaborated based on the models obtained from the new modeling approach. Then, an equivalent circuit representation of current-mode control is presented for the sake of easy understanding. The effect of the current loop is equivalent to controlling the inductor current as a current source with certain impedance. The circuit representation provides both the simplicity of the circuit model and the accuracy of the proposed model. Next, the new modeling approach is extended to V2 current-mode control based on similar concept. The model for V2… Advisors/Committee Members: Lee, Fred C. (committeechair), Boroyevich, Dushan (committee member), Xu, Ming (committee member), Lindner, Douglas K. (committee member), Suchicital, Carlos T. A. (committee member).

Subjects/Keywords: current-mode control; modeling; describing function; equivalent circuit; digital control; DPWM

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

APA (6^th Edition):

Li, J. (2009). Current-Mode Control: Modeling and its Digital Application. (Doctoral Dissertation). Virginia Tech. Retrieved from http://hdl.handle.net/10919/27019

Chicago Manual of Style (16^th Edition):

Li, Jian. “Current-Mode Control: Modeling and its Digital Application.” 2009. Doctoral Dissertation, Virginia Tech. Accessed January 25, 2021. http://hdl.handle.net/10919/27019.

MLA Handbook (7^th Edition):

Li, Jian. “Current-Mode Control: Modeling and its Digital Application.” 2009. Web. 25 Jan 2021.

Vancouver:

Li J. Current-Mode Control: Modeling and its Digital Application. [Internet] [Doctoral dissertation]. Virginia Tech; 2009. [cited 2021 Jan 25]. Available from: http://hdl.handle.net/10919/27019.

Council of Science Editors:

Li J. Current-Mode Control: Modeling and its Digital Application. [Doctoral Dissertation]. Virginia Tech; 2009. Available from: http://hdl.handle.net/10919/27019

The Ohio State University

27. Chen, Liang-kuang. Describing function methods for the analysis of stability and performance of repetitive control of servohydraulic systems.

Degree: MS, Mechanical Engineering, 1996, The Ohio State University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=osu1102102812

Subjects/Keywords: SIDF; DESCRIBING FUNCTION; nonlinear system; TSIDF; nonlinear; REPETITIVE CONTROL; Error signal

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APA (6^th Edition):

Chen, L. (1996). Describing function methods for the analysis of stability and performance of repetitive control of servohydraulic systems. (Masters Thesis). The Ohio State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=osu1102102812

Chicago Manual of Style (16^th Edition):

Chen, Liang-kuang. “Describing function methods for the analysis of stability and performance of repetitive control of servohydraulic systems.” 1996. Masters Thesis, The Ohio State University. Accessed January 25, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=osu1102102812.

MLA Handbook (7^th Edition):

Chen, Liang-kuang. “Describing function methods for the analysis of stability and performance of repetitive control of servohydraulic systems.” 1996. Web. 25 Jan 2021.

Vancouver:

Chen L. Describing function methods for the analysis of stability and performance of repetitive control of servohydraulic systems. [Internet] [Masters thesis]. The Ohio State University; 1996. [cited 2021 Jan 25]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1102102812.

Council of Science Editors:

Chen L. Describing function methods for the analysis of stability and performance of repetitive control of servohydraulic systems. [Masters Thesis]. The Ohio State University; 1996. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1102102812

Texas A&M University

28. Liu, Qun. Automated Determination of Arterial Input Function Areas in Perfusion Analysis.

Degree: MS, Biomedical Engineering, 2013, Texas A&M University

URL: http://hdl.handle.net/1969.1/152445

► Perfusion in biological system refers to capillary-level blood flow in tissues, and is a critical parameter used for detecting physiological changes. Medical imaging provides an… (more)

▼ Perfusion in biological system refers to capillary-level blood flow in tissues, and is a critical parameter used for detecting physiological changes. Medical imaging provides an effective way to measure tissue perfusion. Quantitative analysis of perfusion studies requires the accurate determination of the arterial input function (AIF), which describes the delivery of intravascular tracers to tissues. Automating the process of finding the AIF can save operating time, remove the inter-operator variability, and correct the errors in the presence of the dispersion of the arterial system. Even though several methods are currently developed for automatically extracting an AIF, they are specific to a single modality and particular to a certain tissue. In this thesis, we developed an algorithm to automatically determine an AIF by classifying the characteristic parameters of image pixels' dynamic evaluation curves between blood feeding areas and tissues. This automated AIF determination can be used to facilitate the generation of parametric maps for perfusion studies based on various imaging modalities and covering a variety of tissues. Automatic AIF determination was accomplished by extracting characteristic parameters such as maximum slope, maximum enhancement, time to peak, time to wash-out, and wash-out slope. Multi-dimensional data containing the characteristic parameters were converted and reduced into two-dimensional (2-D) representations, which were presented as a plurality of 2-D plots. Then physiological phases were localized within the simplified representations. Automated segmentation of non-AIF tissues and determination of AIF areas were accomplished by automatically finding peaks and valleys of each physiological phase on the plurality of 2-D plots. The algorithm was tested in CT myocardial perfusion studies, in which a pig was used as a model of myocardial ischemia and perfusion. PET gastrointestinal (GI) perfusion studies were performed using this algorithm, in which GI perfusion was evaluated when cardiac outputs were controlled with four modes. This automated AIF determination study was compared with manual selection of AIF in PET imaging and microsphere studies to assess the effectiveness of this algorithm. In the CT myocardial perfusion study, the perfusion of infarcted myocardium was significantly lower than that of non-infarcted areas and lower than that when it was normal. In the PET abdominal perfusion study, PET imaging data gives lower value of standard deviation relative to the mean than that in microsphere results. In the manual AIF selection study, a slight change in selecting the AIF region caused a big influence on the result. On the contrary, the automated AIF selection remains consistent in the entire study and reduces inter-operator variation. A conclusion was made that this technique is applicable to several imaging modalities, such as PET, CT and MRI, and is effective on many tissues. In addition, this algorithm is straightforward and provides consistent results. More importantly, this… Advisors/Committee Members: Lenox, Mark (advisor), Meissner, Kenith (advisor), Ji, Jim (committee member).

Subjects/Keywords: Perfusion; Arterial Input Function; Automated; PET; CT; medical imaging

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

APA (6^th Edition):

Liu, Q. (2013). Automated Determination of Arterial Input Function Areas in Perfusion Analysis. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/152445

Chicago Manual of Style (16^th Edition):

Liu, Qun. “Automated Determination of Arterial Input Function Areas in Perfusion Analysis.” 2013. Masters Thesis, Texas A&M University. Accessed January 25, 2021. http://hdl.handle.net/1969.1/152445.

MLA Handbook (7^th Edition):

Liu, Qun. “Automated Determination of Arterial Input Function Areas in Perfusion Analysis.” 2013. Web. 25 Jan 2021.

Vancouver:

Liu Q. Automated Determination of Arterial Input Function Areas in Perfusion Analysis. [Internet] [Masters thesis]. Texas A&M University; 2013. [cited 2021 Jan 25]. Available from: http://hdl.handle.net/1969.1/152445.

Council of Science Editors:

Liu Q. Automated Determination of Arterial Input Function Areas in Perfusion Analysis. [Masters Thesis]. Texas A&M University; 2013. Available from: http://hdl.handle.net/1969.1/152445

NSYSU

29. Liu, Fang-hsin. A continuation algorithm embedded in the radial basis function collocation method for Gross-Pitaevskii equation.

Degree: Master, Applied Mathematics, 2015, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0705115-143616

► We compute the numerical solution of Gross-Pitaevskii equation by a continuation algorithm embedded in the radial basis function collocation method. The equation is interpolated by… (more)

Subjects/Keywords: radial basis function; continuation method; collocation method; Gross-Pitaevskii equation; inverse multiquadric function

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

APA (6^th Edition):

Liu, F. (2015). A continuation algorithm embedded in the radial basis function collocation method for Gross-Pitaevskii equation. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0705115-143616

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Liu, Fang-hsin. “A continuation algorithm embedded in the radial basis function collocation method for Gross-Pitaevskii equation.” 2015. Thesis, NSYSU. Accessed January 25, 2021. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0705115-143616.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Liu, Fang-hsin. “A continuation algorithm embedded in the radial basis function collocation method for Gross-Pitaevskii equation.” 2015. Web. 25 Jan 2021.

Vancouver:

Liu F. A continuation algorithm embedded in the radial basis function collocation method for Gross-Pitaevskii equation. [Internet] [Thesis]. NSYSU; 2015. [cited 2021 Jan 25]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0705115-143616.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Liu F. A continuation algorithm embedded in the radial basis function collocation method for Gross-Pitaevskii equation. [Thesis]. NSYSU; 2015. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0705115-143616

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Georgia

30. Paoletti, Teo Joseph. Pre-service teachers’ development of bidirectional reasoning.

Degree: 2016, University of Georgia

URL: http://hdl.handle.net/10724/34547

► Researchers have indicated students and teachers do not maintain productive function and inverse function meanings. Other researchers have indicated that students are capable of developing… (more)

▼ Researchers have indicated students and teachers do not maintain productive function and inverse function meanings. Other researchers have indicated that students are capable of developing foundational meanings for mathematical ideas through quantitative and covariational reasoning. This dissertation reports results of an investigation into the ways in which students can leverage quantitative and covariational reasoning to develop their function and inverse function meanings. Specifically, I examine two pre-service teachers’ activities in a semester long teaching experiment in which they addressed tasks intended to support them in developing bidirectional reasoning via quantitative and covariational reasoning. In my analysis, I identify two manifestations of bidirectional reasoning: reasoning bidirectionally with respect to axes and reasoning bidirectionally with respect to quantities. I distinguish instances of students’ activities exemplifying each type of reasoning and I characterize the interplay of the manifestations. In addition to exploring the students’ bidirectional reasoning, I examine implications this reasoning had for their other mathematical meanings. Engaging in bidirectional reasoning had immediate implications for the students’ understanding of conventions common to school mathematics as conventions rather than steadfast rules that needed to be followed. For example, whereas in a pre-interview the students unquestionably presumed the input of a graphed function was represented on the horizontal axis, by the end of the teaching experiment each student considered the quantity on either axis (or a implicitly defined third quantity) as representing the input to a graphed function. I also describe the students’ development of more sophisticated function and inverse function meanings that was supported by their reasoning bidirectionally. For example, whereas each student maintained inverse function meanings that relied on switching techniques in the pre-interview, by the end of the teaching experiment each student understood function and inverse function to be about defining input and output quantities. These findings have important implications for the teaching and learning of both pre-service teachers as well as for middle and high school students. I conclude with these implications as well as limitations of the study and directions for future research.

Subjects/Keywords: Pre-service teachers; Quantitative reasoning; Covariational reasoning; Function; Inverse function; Teaching experiment

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

APA (6^th Edition):

Paoletti, T. J. (2016). Pre-service teachers’ development of bidirectional reasoning. (Thesis). University of Georgia. Retrieved from http://hdl.handle.net/10724/34547

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Paoletti, Teo Joseph. “Pre-service teachers’ development of bidirectional reasoning.” 2016. Thesis, University of Georgia. Accessed January 25, 2021. http://hdl.handle.net/10724/34547.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Paoletti, Teo Joseph. “Pre-service teachers’ development of bidirectional reasoning.” 2016. Web. 25 Jan 2021.

Vancouver:

Paoletti TJ. Pre-service teachers’ development of bidirectional reasoning. [Internet] [Thesis]. University of Georgia; 2016. [cited 2021 Jan 25]. Available from: http://hdl.handle.net/10724/34547.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Paoletti TJ. Pre-service teachers’ development of bidirectional reasoning. [Thesis]. University of Georgia; 2016. Available from: http://hdl.handle.net/10724/34547

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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Open Access Theses and Dissertations