Intelligent Adaptive Tracking Controller Design for Stochastic Switched Pure-Feedback Nonlinear Systems With Input Saturation and Non-Lower Triangular Structure

Abstract

This paper concentrates on the design of intelligent adaptive tracking controller for stochastic switched nonlinear pure-feedback systems with input saturation and non-lower triangular structure. It needs to be emphasized that both the issues of pure-feedback structure and non-differential saturation nonlinearity are involved in the studied system. With the help of the mean-value theorem, a novel intelligent adaptive tracking controller is developed in this work to overcome the difficulty resulted from pure-feedback structure, and the inherent property of Gaussian functions is utilized to handle functions that are unknown and include all state variables. Moreover, through the universal intelligent approximation technology, a novel control strategy is constructed under the framework of backstepping, which guarantees that the tracking error can converge to a small neighborhood near the origin in the sense of mean quartic value and all signals of the nonlinear closed-loop system can be bounded in probability. Eventually, the effectiveness of the presented scheme is further illustrated by the simulation of two practical examples. INDEX TERMS Stochastic switched nonlinear systems; non-lower triangular structure; pure-feedback structure; input saturation; intelligent adaptive tracking control.

Adaptive fuzzy finite‐time fault‐tolerant control design for nonlinear pure‐feedback systems with sensor faults

“…In recent years, nonlinear PFSs have received many attentions. [1][2][3][4][5] Compared to strict-feedback systems, PFSs are more general. On the one hand, the nonlinear PFSs can more realistically reflect the state of the actual system.…”

“…Nonlinear control systems have gradually come into the public and improved the modern control theory system. In recent years, nonlinear PFSs have received many attentions 1–5 . Compared to strict‐feedback systems, PFSs are more general.…”