Title :
Comments on "A unified approach for stability analysis of a class of time-varying nonlinear systems"
Author :
Sio, K.C. ; Lee, C.K.
Author_Institution :
Dept. of Electr. & Inf. Eng., Hong Kong Polytech. Univ., China
Abstract :
A unified approach for constructing strictly passive systems has been proposed by Feng and Fei (1999). However, we have found that contradictory cases exist and additional prerequisites might be required for the proofs of the lemmas. Illustrations and proofs are provided in this paper to act as counterexamples.
Keywords :
control system analysis; nonlinear control systems; stability; time-varying systems; stability analysis; time-varying nonlinear systems; unified approach; Control systems; Controllability; Filtering theory; Linear systems; Nonlinear systems; Signal synthesis; Stability analysis; State-space methods; Time varying systems; Transfer functions;
Journal_Title :
Automatic Control, IEEE Transactions on
