具有保性能的容错控制

文章针对执行器故障,给出了一种具有保性能主动容错控制器的设计方法。这种控制器的设计方法是将问题转化为线性矩阵不等式(LMI)问题来解决的,利用MATLAB中LMI工具箱快速得到。该控制器设计方法既没有传统被动容错器保守性问题,也没有主动容错控制器在没有正确的故障检测和分离决策情况下稳定性的危险性问题。换言之,正确的故障检测和分离决策将进一步加强系统的优化性能。最后给出了仿真实例,仿真结果说明该方法是正确可靠的。

Fault-tolerant control with holding performance

In order to solve actuator failures,one new strategy is proposed for active fault-tolerant controllers with holding performance.The problem of fault-tolerance is transformed into the problem of linear matrix inequation(LMI) and resolved rapidly by the LMI box in the Matlab software. The method employed avoids the problem of conservativeness of conventional passive fault-tolerant control and the risk of instability associated with active fault-tolerant control in the case of an incorrect fault detection and isolation decision.In other words, the correct fault detection and isolation decision will further lead to optimal performance of the system.Finally,a simulation example is given,and the simulation results show the effectiveness of the proposed method.