For the process in Exercise 14.5, a PI controller is tie- signed so that the peak value of the complementary sensitivity function Is MT = 1.25, Use the robust stability limit of Eq. 14-35 to estimate the values of the time constant for which closed-loop stability is guaranteed. Assume that the process gain and time delay do notchange.

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(14-35) for all w> 0 |T(jo)|< e(w)