一类非线性系统基于观测器的自适应容错控制

Observed-based adaptive fault-tolerant control for a class of nonlinear systems

研究了一类不确定非线性系统的自适应容错控制问题。在系统的非线性函数、外界扰动、建模不确定性以及未知故障输入的上界均未知的情况下,通过构造Lyapunov函数,基于鲁棒自适应观测器设计了新的自适应容错控制器,使得闭环系统渐近稳定。最后,通过仿真算例说明了本文方法的有效性和优越性。

The adaptive fault-tolerant control on the uncertain nonlinear system was studied.A new adaptive fault-tolerant controller was designed to asymptotically stabilize the close-loop system based on a robust adaptive observer by constructing a novel Lyapunov function under the condition of without the knowledge of upper bounds of the nonlinear function,the external disturbance,the modeling uncertainty and the unknown fault input.A case numerical example illustrated the effectiveness and superiority of the proposed method.