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You searched for +publisher:"University of Vermont" +contributor:("Hamid R. Ossareh"). Showing records 1 – 3 of 3 total matches.

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University of Vermont

1. Liu, Yudan. Decoupled Reference Governors for Multi-Input Multi-Output Systems.

Degree: MS, Electrical Engineering, 2018, University of Vermont

In this work, a computationally efficient solution for constraint management of square multi-input multi-output (MIMO) systems is presented. The solution, referred to as the Decoupled Reference Governor (DRG), maintains the highly-attractive computational features of scalar reference governors (SRG) compared to Vector Reference Governor (VRG) and Command Governor (CG). This work focuses on square MIMO systems that already achieve the desired tracking performance. The goal of DRG is to enforce output constraints and simultaneously ensure that the degradation to tracking performance is minimal. DRG is based on decoupling the input-output dynamics of the system so that every channel of the system can be viewed as an independent input-output relationship, followed by the deployment of a bank of scalar reference governors for each decoupled channel. We present a detailed set-theoretic analysis of DRG, which highlights its main characteristics. A quantitative comparison between DRG, SRG, and the VRG is also presented in order to illustrate the computational advantages of DRG. Finally, a distillation process is introduced as an example to illustrate the applicability of DRG. Advisors/Committee Members: Hamid R. Ossareh.

Subjects/Keywords: Electrical and Electronics

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

APA (6th Edition):

Liu, Y. (2018). Decoupled Reference Governors for Multi-Input Multi-Output Systems. (Thesis). University of Vermont. Retrieved from https://scholarworks.uvm.edu/graddis/970

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

Chicago Manual of Style (16th Edition):

Liu, Yudan. “Decoupled Reference Governors for Multi-Input Multi-Output Systems.” 2018. Thesis, University of Vermont. Accessed July 03, 2020. https://scholarworks.uvm.edu/graddis/970.

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

MLA Handbook (7th Edition):

Liu, Yudan. “Decoupled Reference Governors for Multi-Input Multi-Output Systems.” 2018. Web. 03 Jul 2020.

Vancouver:

Liu Y. Decoupled Reference Governors for Multi-Input Multi-Output Systems. [Internet] [Thesis]. University of Vermont; 2018. [cited 2020 Jul 03]. Available from: https://scholarworks.uvm.edu/graddis/970.

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

Council of Science Editors:

Liu Y. Decoupled Reference Governors for Multi-Input Multi-Output Systems. [Thesis]. University of Vermont; 2018. Available from: https://scholarworks.uvm.edu/graddis/970

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

2. Huang, Wei-Ping. Quasilinear Control of Systems with Time-Delays and Nonlinear Actuators and Sensors.

Degree: MS, Electrical Engineering, 2018, University of Vermont

This thesis investigates Quasilinear Control (QLC) of time-delay systems with nonlinear actuators and sensors and analyzes the accuracy of stochastic linearization for these systems. QLC leverages the method of stochastic linearization to replace each nonlinearity with an equivalent gain, which is obtained by solving a transcendental equation. The idea of QLC is to stochastically linearize the system in order to analyze and design controllers using classical linear control theory. In this thesis, the existence of the equivalent gain for a closed-loop time-delay system is discussed. To compute the equivalent gain, two methods are explored. The first method uses an explicit but complex algorithm based on delay Lyapunov equation to study the time-delay, while the second method uses Pade approximant. It is shown that, under a suitable criterion, Pade approximant can be effectively applied for QLC of time-delay systems. Furthermore, the method of Saturated-Root Locus (S-RL) is extended to nonlinear time-delay systems. It turns out that, in a time-delay system, S-RL always terminates prematurely as opposed to a delay-free system, which may or may not terminate prematurely. Statistical experiments are performed to investigate the accuracy of stochastic linearization compared to a system without time-delay. The impact of increasing the time-delay in the approach of stochastic linearization is also investigated. Results show that stochastic linearization effectively linearizes a nonlinear time-delay system, even though delays generally degrade accuracy. Overall, the accuracy remains relatively high over the selected parameters. Finally, this approach is applied to pitch control in a wind turbine system as a practical example of a nonlinear time-delay system, and its performance is analyzed to demonstrate the efficacy of the approach. Advisors/Committee Members: Hamid R. Ossareh.

Subjects/Keywords: Control System; Nonlinear System; Stochastic Control; Time-delay System; Electrical and Electronics

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

APA (6th Edition):

Huang, W. (2018). Quasilinear Control of Systems with Time-Delays and Nonlinear Actuators and Sensors. (Thesis). University of Vermont. Retrieved from https://scholarworks.uvm.edu/graddis/967

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

Chicago Manual of Style (16th Edition):

Huang, Wei-Ping. “Quasilinear Control of Systems with Time-Delays and Nonlinear Actuators and Sensors.” 2018. Thesis, University of Vermont. Accessed July 03, 2020. https://scholarworks.uvm.edu/graddis/967.

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

MLA Handbook (7th Edition):

Huang, Wei-Ping. “Quasilinear Control of Systems with Time-Delays and Nonlinear Actuators and Sensors.” 2018. Web. 03 Jul 2020.

Vancouver:

Huang W. Quasilinear Control of Systems with Time-Delays and Nonlinear Actuators and Sensors. [Internet] [Thesis]. University of Vermont; 2018. [cited 2020 Jul 03]. Available from: https://scholarworks.uvm.edu/graddis/967.

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

Council of Science Editors:

Huang W. Quasilinear Control of Systems with Time-Delays and Nonlinear Actuators and Sensors. [Thesis]. University of Vermont; 2018. Available from: https://scholarworks.uvm.edu/graddis/967

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

3. Wisotzki, Sam. The Incorruptible Integrator: A Streamlined Approach to IMC-PID Controller Tuning.

Degree: MS, Electrical Engineering, 2019, University of Vermont

In automakers' never-ending quest to reduce emissions and improve performance, the turbocharger represents a major step in advancing these goals. By repurposing waste exhaust and compressing the air intake, they are able to increase overall power. One critical control loop in the turbocharger is control of boost pressure via the wastegate. This is a highly nonlinear process and experimental data has shown that a gain-scheduled PID (proportional integral derivative) controller developed with IMC (internal model control) tuning methodology is an effective means to control boost pressure. Motivated by this successful implementation of IMC-PID tuning in the automotive world, this work hopes to extend and analyze that framework. Traditionally, the success of an IMC controller depends on the accuracy of the plant model. This research challenges this view and investigates using IMC with a gain-integrator-delay (GID) model identified at a critical frequency, regardless of the actual plant. The GID model is useful because of its simplicity to characterize and its ability to be translated to the ubiquitous PID controller easily. Three design techniques are developed: (1) design for post-hoc tuning, (2) design for closed loop bandwidth, and (3) design for phase margin. In addition, these techniques are investigated via a Monte Carlo simulation to determine efficacy for when there exists plant/model mismatch. Finally, the three techniques are applied to control the speed of an inertia disk on the Quanser Servo 2 device. Advisors/Committee Members: Hamid R. Ossareh.

Subjects/Keywords: Electrical and Electronics

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

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

APA (6th Edition):

Wisotzki, S. (2019). The Incorruptible Integrator: A Streamlined Approach to IMC-PID Controller Tuning. (Thesis). University of Vermont. Retrieved from https://scholarworks.uvm.edu/graddis/1078

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

Chicago Manual of Style (16th Edition):

Wisotzki, Sam. “The Incorruptible Integrator: A Streamlined Approach to IMC-PID Controller Tuning.” 2019. Thesis, University of Vermont. Accessed July 03, 2020. https://scholarworks.uvm.edu/graddis/1078.

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

MLA Handbook (7th Edition):

Wisotzki, Sam. “The Incorruptible Integrator: A Streamlined Approach to IMC-PID Controller Tuning.” 2019. Web. 03 Jul 2020.

Vancouver:

Wisotzki S. The Incorruptible Integrator: A Streamlined Approach to IMC-PID Controller Tuning. [Internet] [Thesis]. University of Vermont; 2019. [cited 2020 Jul 03]. Available from: https://scholarworks.uvm.edu/graddis/1078.

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

Council of Science Editors:

Wisotzki S. The Incorruptible Integrator: A Streamlined Approach to IMC-PID Controller Tuning. [Thesis]. University of Vermont; 2019. Available from: https://scholarworks.uvm.edu/graddis/1078

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

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