DocumentCode :
3439722
Title :
Adaptive output feedback control for uncertain nonlinear strictly-feedback systems using fuzzy logic systems
Author :
Zheng, Yunfeng ; Sun, Hongbo ; Peng, Guojun
Author_Institution :
Navig. Coll., Dalian Maritime Univ., Dalian, China
Volume :
2
fYear :
2010
fDate :
29-31 Oct. 2010
Firstpage :
402
Lastpage :
407
Abstract :
A nonlinear adaptive observer is designed based on function approximation for a class of unknown strict-feedback systems with unmeasured states. The nonlinearities are not restricted to output nonlinearities. To guarantee the boundedness of the parameter estimation errors, we use the projection algorithm in the adaptive laws. Based on this observer, observer backstepping method is used to design controller. Nonlinear damping terms are used to counteract the destabilizing effect of the parameter estimation errors and observation estimation errors. Some restrictive assumptions such as the requirement of nonlinearities satisfying matching conditions and a known bound on the approximation observation errors are relaxed. The overall adaptive scheme is shown to be guaranteed semiglobal uniform ultimate boundedness.
Keywords :
adaptive control; damping; feedback; function approximation; fuzzy control; fuzzy systems; nonlinear control systems; observers; parameter estimation; adaptive output feedback control; fuzzy logic system; nonlinear adaptive observer; observation estimation error; observer backstepping method; parameter estimation error; projection algorithm; semiglobal uniform ultimate boundedness; strict feedback system; uncertain nonlinear strictly feedback system; Variable speed drives;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Intelligent Computing and Intelligent Systems (ICIS), 2010 IEEE International Conference on
Conference_Location :
Xiamen
Print_ISBN :
978-1-4244-6582-8
Type :
conf
DOI :
10.1109/ICICISYS.2010.5658302
Filename :
5658302
Link To Document :
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