Adaptive fuzzy decentralized output feedback control for stochastic nonlinear large-scale systems using DSC technique

2011 ◽  
Vol 23 (4) ◽  
pp. 381-399 ◽  
Author(s):  
Shaocheng Tong ◽  
Yongming Li ◽  
Tao Wang
Keyword(s):  
Feedback Control ◽  
Output Feedback ◽  
Large Scale ◽  
Output Feedback Control ◽  
Large Scale Systems ◽  
Adaptive Fuzzy

Adaptive decentralized fuzzy output feedback tracking control for a class of nonlinear large-scale systems with input delays

2017 ◽  
Vol 40 (12) ◽  
pp. 3534-3548 ◽  
Author(s):  
Barmak Baigzadehnoe ◽  
Zahra Rahmani ◽  
Alireza Khosravi ◽  
Behrooz Rezaie
Keyword(s):  
Feedback Control ◽  
Output Feedback ◽  
Tracking Control ◽  
Large Scale ◽  
Output Feedback Control ◽  
Backstepping Technique ◽  
Large Scale Systems ◽  
Fuzzy Observer ◽  
Adaptive Fuzzy ◽  
Input Delays

In this paper, the decentralized tracking control problem of nonlinear large-scale systems with immeasurable states and unknown nonlinearities in each subsystem and their interconnections subject to input delays is proposed. Based on the universal approximation properties of fuzzy systems, a fuzzy observer is designed to estimate the inaccessible states of the system. Subsequently, by defining the appropriate change of coordinates and employing the backstepping technique, an adaptive fuzzy backstepping output feedback control scheme is proposed for nonlinear interconnected systems subject to input delays. Owing to the problem of so-called explosion of complexity that inherently arises in the design procedures of the traditional backstepping technique, an adaptive fuzzy dynamic surface output feedback control approach is also presented for this class of large-scale systems. Moreover, it is shown that the two proposed adaptive decentralized fuzzy observer-based control approaches ensure all the signals of the closed loop system uniformly ultimately bounded and the norms of the tracking errors as well as the norms of the observation errors can converge to small desired values by proper selection of the design parameters. Finally, the theoretic achievements are carried out on the chemical reactor recycle system to illustrate and compare the effectiveness of the two proposed approaches.

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