一类约束非线性系统的自适应模糊容错控制

针对一类输出受限的非线性系统，提出了一种自适应模糊容错控制方案。在考虑可能发生的执行器故障的情况下，采用非线性映射的方法处理系统受约束的输出变量，从而将约束量的初值选取区间扩大为整个约束空间；用有界的参考信号代换未知函数的自变量，再用模糊逼近器处理这些未知函数，并结合自适应技术处理代换误差和逼近误差，从而使得闭环系统为全局一致最终有界，系统输出可以有效跟踪参考信号。仿真结果进一步验证了本文方法的有效性。

Adaptive Fuzzy Fault-Tolerant Control for a Class of Constrained Nonlinear Systems

An adaptive fuzzy fault-tolerant control scheme is proposed for a class of uncertain nonlinear systems in this paper. By taking the possible actuator faults into account, a novel nonlinear-mapping technique was proposed to deal with the constrained output variables, so that the system outputs can start from within the initial output constrained space. The bounded reference signals were used to replace the independent argument of the unknown interconnected functions, then the fuzzy approximators were used to deal with these unknown functions, and the adaptive technique was combined to deal with the errors of replacement and approximation. The globally uniformly ultimately boundedness of the closed-loop system is guaranteed, and the system output ca track the reference signal effectively. Simulation results were provided to show the effectiveness of the control approach.