Fault tolerant control for singular systems with actuator saturation and nonlinear perturbation
Fault tolerant control for singular systems with actuator saturation and nonlinear perturbation
复制标题
具有执行器饱和和非线性扰动的奇异系统的容错控制
DOI：
10.1016/j.automatica.2010.01.024
复制
发表时间：
2010
期刊：
影响因子：
6.4
通讯作者：
Wang, Yijing
中科院分区：
文献类型：
--
作者：
Zuo, Zhiqiang;Ho, Daniel W. C.;Wang, Yijing
本文研究了一类同时受时变状态相关非线性扰动和执行器饱和影响的奇异系统的鲁棒容错控制问题。首次提出了固定增益控制器存在的充分条件，保证了闭环系统在所有可能的故障下的规律性、无脉冲性和稳定性。制定具有 LMI 约束的优化问题以确定最大收缩不变椭球。然后开发了一种自适应容错控制器，通过估计故障并在线更新设计参数矩阵来补偿故障对系统的影响。这两个控制器都采用饱和避免反馈的形式，与高增益控制器相比，其优点是执行器容量相对较小。其中包含一个示例来说明拟议的程序及其有效性。
In this paper, the problem of robust fault tolerant control for a class of singular systems subject to both time-varying state-dependent nonlinear perturbation and actuator saturation is investigated. A sufficient condition for the existence of a fixed-gain controller is first proposed which guarantees the regularity, impulse-free and stability of the closed-loop system under all possible faults. An optimization problem with LMI constraints is formulated to determine the largest contractively invariant ellipsoid. An adaptive fault tolerant controller is then developed to compensate for the failure effects on the system by estimating the fault and updating the design parameter matrices online. Both of these two controllers are in the form of a saturation avoidance feedback with the advantage of relatively small actuator capacities compared with the high gain counterpart. An example is included to illustrate the proposed procedures and their effectiveness.