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Effect of RHP zeros and poles on the sensitivity functions in multivariable systems
Kjetil Havre and Sigurd Skogestad

Journal of Process Control
8 (3), pages 155-164 (June 1998)

Abstract

This paper examines the implications of Right Half Plane (RHP) zeros and poles on performance of multivariable feedback systems. The results quantify the fundamental limitations imposed by RHP-zeros and poles in terms of lower bounds on the peaks in the weighted sensitivity and complementary sensitivity functions.