Title :
Indirect adaptive fuzzy robust control for a class of nonlinear MIMO systems
Author :
Liu, Guorong ; WAN, Baiwu
Author_Institution :
Syst. Eng. Inst., Xi´´an Jiaotong Univ., China
Abstract :
The adaptive fuzzy robust control scheme is proposed by applying "dominant input" concept for a class of unknown nonlinear MIMO systems. The scheme combines adaptive control with H∞ control and a fuzzy logic approximation method. It is shown that the proposed scheme guarantees the closed-loop system is globally stable and achieves H∞ tracking performance index, and the influence of external disturbances and fuzzy logic approximation errors and the cross-coupling of inputs to outputs on the tracking error is attenuated to a prescribed level. Compared with the design method proposed in Shaocheng Tong et al. (2000), the scheme reduces the complexity of the closed-loop system and simplifies the design, and is convenient for engineering application
Keywords :
H∞ control; MIMO systems; adaptive control; asymptotic stability; closed loop systems; control system synthesis; fuzzy control; fuzzy logic; nonlinear control systems; robust control; uncertain systems; H∞ control; H∞ tracking performance index; closed-loop system; dominant input concept; fuzzy logic approximation method; globally stable system; indirect adaptive fuzzy robust control; nonlinear MIMO systems; tracking error; unknown systems; Adaptive control; Approximation error; Approximation methods; Fuzzy control; Fuzzy logic; Fuzzy systems; MIMO; Performance analysis; Programmable control; Robust control;
Conference_Titel :
Info-tech and Info-net, 2001. Proceedings. ICII 2001 - Beijing. 2001 International Conferences on
Conference_Location :
Beijing
Print_ISBN :
0-7803-7010-4
DOI :
10.1109/ICII.2001.983835
