Robust stability analysis of linear continuous/discrete-time systems with output feedback controllers

The robust stability of linear systems with output feedback controllers and time-varying uncertain parameters is considered. The robust stability bounds for time-varying uncertain parameters are given using the Lyapunov method. When there are no uncertain parameters in the input and/or output matrices, it is shown that the result for continuous-time systems is the same as that presented by K.M. Zhou and P.P. Khargonekar (1987), and the result for discrete-time systems is better than that of S.R. Kolla (1989) for the same example.<
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