Robust H∞ Controller Design for Nonlinear T-S Fuzzy System With Time Delay

• Main Authors: Chia-wei Hsu, 許家維
• Other Authors: Cheng-neng Huang
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/85597738670883352043

碩士 === 國立成功大學 === 系統及船舶機電工程學系碩博士班 === 97 === Since the system performance or the desired specifications is hard to be achieved when there is any unknown or uncertain variables, which could even make systems unstable, and since we also need to consider the system’s delay factors caused from measurement of system variables, system physical properties or signal transmission, a TS (Takaki-Sugeno) Fuzzy- H∞ control law is proposed in the thesis in dealing with the performance-matching and the time-delay problems. One of the advantages of Fuzzy control theorem is that the controller can be designed by using rules of data base without knowing actual system model. Besides, the nonlinear terms of systems may be included in TS Fuzzy model by rules. Because the characteristic of H∞ controller is to preserve the close-loop stability and robustness of the system, composite TS-Fuzzy H∞ controller, which contains the benefits of both H∞ controller and TS Fuzzy controller, is proposed in this thesis to handle both the system uncertain disturbances and system variable variations, especially for systems with time delay. Finally, an example with uncertain nonlinear terms is given to illustrate the effectiveness of the proposed approaches. The computer simulation results reveal that the proposed TS Fuzzy-H∞ controller scheme is feasible to reject the system uncertainties or disturbances effectively with good tracking performance.