State and Fault Estimation For Infinitely Unobservable Descriptor Systems Using Sliding Mode Observers
State and Fault Estimation For Infinitely Unobservable Descriptor Systems Using Sliding Mode Observers
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DOI：
10.1002/asjc.1033
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发表时间：
2015-07
影响因子：
2.4
通讯作者：
Jeremy Hor Teong Ooi;C. P. Tan;K. Y. Ng
中科院分区：
文献类型：
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作者：
Jeremy Hor Teong Ooi;C. P. Tan;K. Y. Ng
针对一类无穷大不可观测广义系统，提出了一种基于滑模观测器的状态和故障估计新方法。将原始无限不可观测系统的某些状态视为未知输入会导致无穷可观测的降阶系统。然后通过设计基于降阶系统的SMO，实现状态估计和故障重构，从而放松了对原系统无穷可观性的要求。本文还研究了用原系统矩阵表示的充分必要条件。仿真算例验证了本文的结论。
This paper presents a novel scheme for estimating states and faults for a class of infinitely unobservable descriptor systems using sliding mode observers (SMOs). Treating certain states of the original infinitely unobservable system as unknown inputs results in a reduced‐order system that is infinitely observable. Then by designing the SMO based on the reduced‐order system, state estimation and fault reconstruction is achieved, thus relaxing the infinite observability requirement of the original system. The necessary and sufficient conditions in terms of the original system matrices are also investigated. A simulation example verifies the claims made in this paper.