Abstract

Stable dynamical controller design and system robustness improvement by polynomial pole assignment are considered. Based on a generic controller form for polynomial pole assignment, a formulation of stable dynamical controllers is proposed. The robustness function in the frequency domain which is used in H/sup /spl infin// robust control design is minimised using the freedom provided by polynomial pole assignment. It is also shown how to combine time-domain performance specifications provided by pole assignment and robust performance specifications in the frequency domain considered by H/sup /spl infin// control to realise joint optimum robustness.

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