On computing the worst-case peak gain of linear systems

On computing the worst-case peak gain of linear systems

V. Balakrishnan and S. Boyd

Systems and Control Letters, 19:265-269, 1992


Abstract: Based on the bounds due to Doyle and Boyd, we present simple upper and lower bounds for the l^1-norm of the `tail' of the impulse response of finite-dimensional discrete-time linear time-invariant systems. Using these bounds, we may in turn compute the l^infinity-gain of these systems to any desired accuracy. By combining these bounds with results due to Khammash and Pearson, we derive upper and lower bounds for the worst-case l^infinity-gain of discrete-time systems with diagonal perturbations.

Keywords: SISO discrete-time LTI systems, computation of l^infinity-gain, discrete-time systems with diagonal perturbations, worst-case l^infinity-gain.


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