ABSTRACT
With no parameter uncertainty in P and/or W the det [/ + PfFjhas excellent stability margins. Show that with uncertainty in the parameters in W may lead to an unstable system. Hint: let
W = 9 + a 10 + b 8+c 9+d
CHAPTER 6
NOTE: For all MIMO problems for Chapters 6 through 8 only diagonal G(s) and F(s) matrices are to be used. 6.1. For Prob. 5.4 find the system sensitivity function SJ for each structure. If
these sensitivity functions are different, which structure is least sensitive to plant parameter variations and why?
