Optimal/Suboptimal Digital Tracker Designs for Analog Neutral Systems with Multiple Discrete and Distributed Time Delays
| Autor: | Tzong-Jiy Tsai, 蔡宗吉 |
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| Rok vydání: | 2006 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 94 In this dissertation, the finite-time/infinite-time optimal/suboptimal hybrid tracking control problems for analog neutral systems with multiple discrete and distributed time delays are formatted and studied. In order to solve the tracking control problems, a new alternative (indirect) digital redesign approach together with some methods and techniques is proposed to design the digital trackers, which can be briefly stated as follows: (i) Design the prediction-based digital trackers: First, select the weighting matrices of the performance index to have the high-gain property. Then, the Newton center and linear interpolation formula, together with a newly modified rectangular ruler, are utilized to construct the associate discrete models. Finally, by the discrete-time optimal control theory, the prediction-based digital trackers can be obtained. (ii) Design the observer-based digital trackers: When the feedback states are unmeasured, the new augmented digital redesign observers are proposed to estimate the augmented discrete-time state vector. Then, by combining the developed digital tracker gains and digital observer, the observer-based digital trackers are developed to achieve the desired tracking control. (iii) Design the observer-based iterative learning digital tracker: Since the iterative learning control is capable of turning a low-accuracy, high-repeatability system into a high-accuracy system. Thus, the iterative learning control technique is utilized to design the observer-based optimal iterative learning digital trackers. (iv) Design the evolutionary programming (EP)-based digital trackers: Take the advantage of EP methodology for global optimization, we use the EP to search the optimal weighting matrices. Then, by combining the high-gain property, iterative learning control technique, and EP algorithm, the EP-based digital trackers are developed to improve the tracking performance of the EP-based hybrid control neutral system. The effectiveness of developed digital control laws in this dissertation are demonstrated by illustrative examples. It is believed that the presented methods and results of this dissertation is helpful to complete the theories and implements in the literature of optimal tracking control of hybrid neutral multiple time-delay systems. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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