Title :
Comments on "Strictly positive real transfer functions revisited
Author :
Marquez, H.J. ; Damaren, C.J.
Author_Institution :
Dept. of Eng., R. Roads Mil. Coll., Victoria, BC, Canada
fDate :
3/1/1995 12:00:00 AM
Abstract :
In the original paper, by R. Lozano-Leal and S. Joshi (lEEE Trans. Automat. Contr., vol. 35, no. 11, p. 1243-5, 1990), the distinction between weak and strong strictly positive real (SPR) functions was addressed, and the feedback interconnection of a weak SPR system and a passive one was shown to be stable. The purpose of this note is to show that the proof of this lemma is actually incorrect.<>
Keywords :
feedback; stability; transfer functions; feedback interconnection; stability; strictly positive real transfer functions; strong strictly positive real functions; weak strictly positive real functions; Feedback; Linear systems; Terminology; Transfer functions;
Journal_Title :
Automatic Control, IEEE Transactions on
