Adaptive fuzzy controller for a class of strict-feedback nonaffine nonlinear systems  

作　　者：Jie Wen Changsheng Jiang 

机构地区：[1]College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China [2]College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, E R. China

出　　处：《Journal of Systems Engineering and Electronics》2011年第6期967-974,共8页系统工程与电子技术（英文版）

基　　金：supported by the National Natural Science Foundation of China (90716028;11001128)

摘　　要：A robust adaptive fuzzy control scheme is presented for a class of strict-feedback nonaffine nonlinear systems with modeling uncertainties and external disturbances by using a backstepping approach.Fuzzy logic systems are employed to approximate the unknown parts of the desired virtual controls,and the approximation errors of fuzzy systems are only required to be norm-bounded.The function tanh（·） is introduced to avoid problems associated with sgn（·）.The tracking error is guaranteed to be uniformly ultimately bounded with the aid of an additional adaptive compensation term.Chua＇s circuit system and R o¨ssler system are presented to illustrate the feasibility and effectiveness of the proposed control technique.A robust adaptive fuzzy control scheme is presented for a class of strict-feedback nonaffine nonlinear systems with modeling uncertainties and external disturbances by using a backstepping approach.Fuzzy logic systems are employed to approximate the unknown parts of the desired virtual controls,and the approximation errors of fuzzy systems are only required to be norm-bounded.The function tanh（·） is introduced to avoid problems associated with sgn（·）.The tracking error is guaranteed to be uniformly ultimately bounded with the aid of an additional adaptive compensation term.Chua＇s circuit system and R o¨ssler system are presented to illustrate the feasibility and effectiveness of the proposed control technique.

关 键 词：fuzzy control nonaffine system backstepping approach Chua＇s circuit system Ro ¨ssler system tanh function. 

分 类 号：TP273.4[自动化与计算机技术—检测技术与自动化装置] TP13[自动化与计算机技术—控制科学与工程]