| Summary: | 博士 === 國立成功大學 === 電機工程學系碩博士班 === 93 === Abstract
This dissertation is dedicated to develop the output-reference tracker for the hybrid system with input/state saturation constraints and then to solve the problem of performance deterioration in the event of partial actuator or system component failures. The output-reference tracker is designed using the predicted observer-based digitally redesign approach. It includes the following three topics: (i) Using an optimal linearization approach to have the optimal linear model in the vicinity of the operating states, which closely matches the nonlinear system at operating states. The digitally redesigned predictive observer-based tracker is developed to track a desired periodic reference. Besides, an inner state compensator is added to account for the windup phenomenon. (ii) A digital redesign observer-based tracker scheme, which consists of a weighted switching strategy and an inner state compensator, is applied for the continuous-time cascaded system with actuator and state saturation. The weighted switching approach, using an evolutionary programming (EP) optimal search technique, improves the generally poor transition response caused by nonlinear constraints. (iii) A novel state-space self-tuning fault tolerant scheme using a modified Kalman filter algorithm to promote the ability of fault tolerance for cascaded system. The proposed method not only acquires the desired performance of the overall controlled closed-loop system but also actively tolerates the partial actuator and/or system component failures. The above-mentioned observer-based digital redesign technique is utilized in this dissertation to develop output-reference tracker for the hybrid system with input/state constraints. The effectiveness of the developed digital control methods are demonstrated by computer simulation. We believe the advantages of this dissertation are helpful to complete the theories and implements in literature for control of hybrid system with constraints.
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