Actuator fault estimation observer design for discrete‐time linear parameter‐varying descriptor systems
Actuator fault estimation observer design for discrete‐time linear parameter‐varying descriptor systems
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DOI：
10.1002/acs.2469
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发表时间：
2015-02
影响因子：
3.1
通讯作者：
Zhenhua Wang;M. Rodrigues;D. Theilliol;Yi Shen
中科院分区：
文献类型：
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作者：
Zhenhua Wang;M. Rodrigues;D. Theilliol;Yi Shen
研究了一类离散线性变参数广义系统的执行器故障估计问题。将故障作为辅助状态向量，建立了增广系统。然后，基于增广系统设计了故障估计观测器。本文将故障估计观测器的设计问题转化为线性矩阵不等式(LMI)可行性问题。因此，可以通过求解一组严格的线性矩阵不等式来同时设计观测器的所有参数。为了抑制未知扰动、故障变化和测量噪声的影响，进一步提出了一种鲁棒故障估计观测器设计方法，这是本文的主要贡献。最后，通过对卡车-挂车模型的应用，验证了所提出的鲁棒故障估计观测器的性能。版权所有©2014 John Wiley&Sons，Ltd.
This paper deals with actuator fault estimation for a class of discrete‐time linear parameter‐varying descriptor systems. By considering the fault as an auxiliary state vector, an augmented system is established. Then, a fault estimation observer is designed based on the augmented system. In this paper, the fault estimation observer design is formulated as a linear matrix inequality (LMI) feasibility problem. Therefore, all parameters of the observer can be simultaneously designed by solving a set of strict LMIs. In order to attenuate the effect of the unknown disturbance, fault variation, and measurement noise, we further propose a robust fault estimation observer design method, which is the main contribution of this paper. Finally, performance of the proposed robust fault estimation observer is shown through the application to a truck–trailer model. Copyright © 2014 John Wiley & Sons, Ltd.