DocumentCode :
2472625
Title :
Hierarchical Second-Order Sliding-Mode Observer for Linear Systems with Unknown Inputs
Author :
Fridman, L. ; Poznyak, A. ; Bejarano, F.J.
Author_Institution :
Div. of Electr. Eng., National Autonomous Univ. of Mexico
fYear :
2006
fDate :
13-15 Dec. 2006
Firstpage :
5561
Lastpage :
5566
Abstract :
The problem of observability for systems with unknown inputs is revised. The sufficient and necessary conditions are used for the design an observer for linear systems with bounded unknown inputs. To realize the observation of the state, a second order sliding mode observer is suggested. Such observer provides a robust estimate of the state vector in a finite time. The design is based on the concept of the hierarchical output injection maintaining a value of zero for output tracking error at each level of the hierarchy. The equivalent control is used to identify the unknown inputs, which can be used as a contribution concerning the problem of fault detection. A numerical example illustrates the effectiveness of the suggested technique
Keywords :
estimation theory; identification; linear systems; observability; observers; variable structure systems; equivalent control; fault detection; identification; linear systems; observability; output tracking error; robust estimate; second-order sliding-mode observer; state vector; sufficient and necessary conditions; Actuators; Algorithm design and analysis; Convergence; Fault detection; Fault diagnosis; Linear systems; Observers; Robustness; Sliding mode control; State estimation; Sliding modes; identification; observation;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Decision and Control, 2006 45th IEEE Conference on
Conference_Location :
San Diego, CA
Print_ISBN :
1-4244-0171-2
Type :
conf
DOI :
10.1109/CDC.2006.377463
Filename :
4177475
Link To Document :
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