State and Fault Estimation For Infinitely Unobservable Descriptor Systems Using Sliding Mode Observers. Issue 4 (27th October 2014)

• Record Type: Journal Article
• Authors: Teong Ooi, Jeremy Hor; Tan, Chee Pin; Ng, Kok Yew
• Is Part Of: Asian journal of control. Volume 17:Issue 4(2015:Jul.)
• Page Start: 1458
• Page End: 1461
• Publication Date: 2014-10-27
• Subjects: Automatic control -- Periodicals; Control theory -- Periodicals; 629.805
• DOI: 10.1002/asjc.1033
• Languages: English
• ISSNs: 1561-8625

Abstract

<abstract abstract-type="main" id="asjc1033-abs-0001"> <title>Abstract</title> <p id="asjc1033-para-0001">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.</p> </abstract>