Please use this identifier to cite or link to this item: https://doi.org/10.1109/TAC.2003.817003
Title: Comments on "A Composite Energy Function-Based Learning Control Approach for Nonlinear Systems with Time-Varying Parametric Uncertainties"
Authors: Dixon, W.E.
Chen, J.
Xu, J.-X. 
Tan, Y.
Keywords: Learning systems
Lyapunov methods
Periodic systems
Issue Date: Sep-2003
Source: Dixon, W.E., Chen, J., Xu, J.-X., Tan, Y. (2003-09). Comments on "A Composite Energy Function-Based Learning Control Approach for Nonlinear Systems with Time-Varying Parametric Uncertainties". IEEE Transactions on Automatic Control 48 (9) : 1671-1674. ScholarBank@NUS Repository. https://doi.org/10.1109/TAC.2003.817003
Abstract: In the above 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.
Source Title: IEEE Transactions on Automatic Control
URI: http://scholarbank.nus.edu.sg/handle/10635/68174
ISSN: 00189286
DOI: 10.1109/TAC.2003.817003
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