Adaptive Fuzzy Output Feedback Dynamic Surface Control of Interconnected Nonlinear Pure-Feedback Systems

Abstract

In this paper, an adaptive fuzzy decentralized output feedback control design is presented for a class of interconnected nonlinear pure-feedback systems. The considered nonlinear systems contain unknown nonlinear uncertainties and the states are not necessary to be measured directly. Fuzzy logic systems are employed to approximate the unknown nonlinear functions, and then a fuzzy state observer is designed and the estimations of the immeasurable state variables are obtained. Based on the adaptive backstepping dynamic surface control design technique, an adaptive fuzzy decentralized output feedback control scheme is developed. It is proved that all the variables of the resulting closed-loop system are semi-globally uniformly ultimately bounded, and also that the observer and tracking errors are guaranteed to converge to a small neighborhood of the origin. Some simulation results and comparisons with the existing results are provided to illustrate the effectiveness and merits of the proposed approach.

Adaptive tracking control for a class of non-affine switched stochastic nonlinear systems with unmodeled dynamics

“…ii. Compared with previous results [35][36][37][38], we relax the restrictions on control coefficients and reference signals. In this paper, the upper bound of control coefficients is unknown and the second derivative of the reference signal is not required to be bounded, which is more reasonable in practical applications.…”

Teleoperation Control Based on Combination of Wave Variable and Neural Networks

“…Time-varying delays and uncertainties of the robot model have been studied together with adaptive control in [19], [20]. In [21]- [23], adaptive fuzzy control was used for identification of the unknown nonlinear control system. Fuzzy control was used for studying uncertain nonlinear systems in [24], [25].…”

H∞ Tracking Control of Fuzzy Dynamic Output for Nonlinear Networked System with Packet Dropouts

“…In some fields, the tracking control of output is employed far and wide, such as motors [8,9], robots [10], and flights [11]. Based on the tracking control of output, many preliminary studies have been produced [12][13][14][15]. Papers [6,[16][17][18] proposed some questions about stability, and some scholars proposed some thinking about ∞ control [19] as well as the problem of designing about the filter in the literature [20].…”