DocumentCode :
780026
Title :
Comments on "A composite energy function-based learning control approach for nonlinear systems with time-varying parametric uncertainties"
Author :
Dixon, W.E. ; Chen, J.
Author_Institution :
Eng. Sci. & Technol. Div., Oak Ridge Nat. Lab., TN, USA
Volume :
48
Issue :
9
fYear :
2003
Firstpage :
1671
Lastpage :
1672
Abstract :
For original paper see ibid., vol.47, p.1940-5 (2002). In that paper, a composite energy function learning control approach was proposed to asymptotically eliminate the mismatch between the desired and actual periodic trajectory of a system. Upon review of this result, there appear to be several philosophical and technical issues that invalidate the result including the use of a resetting condition and the lack of boundedness of the learning estimate. The intent of this comment is to highlight these technical errors, especially since the boundedness of the learning estimate has historically been a problematic issue.
Keywords :
learning systems; nonlinear control systems; time-varying systems; uncertain systems; asymptotic mismatch elimination; boundedness; composite energy function-based learning control approach; nonlinear systems; periodic trajectory; resetting condition; time-varying parametric uncertainties; Control systems; Digital control; Hard disks; Nonlinear control systems; Nonlinear systems; Optimal control; Rivers; Robust control; Time varying systems; Uncertainty;
fLanguage :
English
Journal_Title :
Automatic Control, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9286
Type :
jour
DOI :
10.1109/TAC.2003.817003
Filename :
1231269
Link To Document :
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