Fault, state, and unknown input reconstruction in nonlinear systems using sliding mode observers

Sharma, R. and Aldeen, M. (2011) Fault, state, and unknown input reconstruction in nonlinear systems using sliding mode observers. Journal of Dynamic Systems Measurement and Control: Transactions of the ASME, 133 5: 051013.1-051013.10. doi:10.1115/1.4004040


Author Sharma, R.
Aldeen, M.
Title Fault, state, and unknown input reconstruction in nonlinear systems using sliding mode observers
Journal name Journal of Dynamic Systems Measurement and Control: Transactions of the ASME   Check publisher's open access policy
ISSN 0022-0434
1528-9028
Publication date 2011-09
Sub-type Article (original research)
DOI 10.1115/1.4004040
Volume 133
Issue 5
Start page 051013.1
End page 051013.10
Total pages 10
Place of publication Fairfield, NJ, United States
Publisher ASME International
Collection year 2012
Language eng
Abstract In this paper, a new approach to estimation of unknown inputs and faults in a class of nonlinear systems is presented. The approach is based on the design of a cascade connection of two sliding mode observers. The first observer is used for the estimation of state and unknown inputs and the second is used for the fault detection and isolation. An important feature of the proposed approach is that the state trajectories do not leave the sliding manifold even in the presence of unknown inputs and faults. This allows for faults and unknown inputs to be completely reconstructed based on the information retrieved from the equivalent output injection signals. The proposed approach is tested on a nonlinear model of single link flexible joint robot system.
Keyword Fault detection and isolation
Sliding mode observer
Nonlinear systems
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status Non-UQ
Additional Notes Article # 051013

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, 05 Jan 2012, 14:24:59 EST by Rahul Sharma on behalf of School of Information Technol and Elec Engineering