Design of integral sliding mode observers for state, fault and unknown input reconstruction

Sharma, R. and Aldeen, M. (2012) Design of integral sliding mode observers for state, fault and unknown input reconstruction. Control and Intelligent Systems, 40 2: 1-10. doi:10.2316/Journal.201.2012.2.201-2330

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Author Sharma, R.
Aldeen, M.
Title Design of integral sliding mode observers for state, fault and unknown input reconstruction
Journal name Control and Intelligent Systems   Check publisher's open access policy
ISSN 1480-1752
1925-5810
Publication date 2012
Sub-type Article (original research)
DOI 10.2316/Journal.201.2012.2.201-2330
Volume 40
Issue 2
Start page 1
End page 10
Total pages 10
Place of publication Calgary, Canada
Publisher ACTA Press
Collection year 2013
Language eng
Abstract This paper proposes a new technique for fault diagnosis and estimation of states and unknown inputs in a class of nonlinear systems. The novelty of this approach lies in the design of two nonlinear observers which incorporate a combination of sliding and integral control actions. The observers are networked together for online information interchange. The first observer is used for fault diagnosis, and the second is used for the unknown inputs. It is shown that under certain conditions, the proposed observer is able to reduce chattering without compromising on estimation accuracy. Another significant advantage of the proposed approach is that the network of two interconnected integral sliding mode observers permits the relaxation of the fault isolability from the unknown inputs (in an appropriate sense), which has been a major problem previously.
Keyword Fault detection
Nonlinear observers
Sliding mode theory
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Non HERDC
School of Information Technology and Electrical Engineering Publications
 
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Created: Thu, 10 May 2012, 16:59:32 EST by Rahul Sharma on behalf of School of Information Technol and Elec Engineering