Robust control for uncertain linear systems with states time-delay using dynamic observer

• Main Authors: Chi-Ming Tzeng, 曾啓銘
• Other Authors: Ching-Hsiang Lee
• Format: Others
• Language: zh-TW
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/44083236614442139422

碩士 === 國立高雄應用科技大學 === 電機工程系碩士班 === 94 === The problems of stability analysis and observer-controller design for uncertain linear systems with states time-delay are studied in this thesis. Three different types of controller are considered：states feedback controller, controller based on Luneberger-like observer and dynamic-observer-based controller. A state feedback controller is first designed to asymptotically stabilize the system assuming all of the system states are available. If the states are not all available, we then use Luenberger-like observers and dynamic observers to estimate the system states and further use the estimate states to control the system. The observer-controller is designed to quadratically stabilize the estimation error and asymptotically stabilize the system states. Sufficient conditions for the existence of the controllers are obtained by using linear matrix inequality (LMI) approach. The derived sufficient conditions for the existence of the controllers are simpler than that in the literature. And, the simulated results are better than that there. However, we cannot obtain more distinguishable improvement over that in the literature because of the complexity of the sufficient conditions for the stability for uncertain linear systems with state time-delay. How to obtain a more distinguishable improvement is still under investigation.