不确定时滞系统多目标约束下的满意容错控制

针对一类具有不确定参数、干扰输入和时滞特性的非线性系统,研究了当执行器发生故障时的满意容错控制问题。在更实际、更一般的执行器连续增益故障模型下,采用一种含有时滞记忆的状态反馈控制律,分析了鲁棒稳定性能与H∞指标的相容性,并在相容指标约束下,给出了鲁棒H∞满意容错控制器存在的充分条件和设计方法。仿真算例验证了该方法的有效性。

Satisfactory fault-tolerant controller design for uncertain nonlinear time-delay systems with multi-indices constrains

The design of satisfactory fault-tolerant control for nonlinear uncertain time-delay systems with actuator failures is addressed.Based on a more practical and general model of actuator continuous gain faults,a kind of feedback controller with time-delay is adopted.By using Lyapunov stabilization theory,the consistency theory on robust stabilization index and H-infinity index for nonlinear uncertain time-delay systems is setup.Furthermore,sufficient conditions for the existence of memory robust H-infinity fault-tolerant satisfactory controller are given,and the effective controller design method for systems with constrains of consistent indices is provided.Numerical examples are given to illustrate the validity of the method.