Abstract
This paper considers controller order reduction with /spl Hscr//sub /spl infin// performance criterion. The author compares via examples how various controller reduction methods perform with respect to the /spl Hscr//sub /spl infin// performance criterion. The author's conclusion is that the coprime factor reduction method proposed by Goddard and Clover is most effective and easy to use for the /spl Hscr//sub /spl infin// controller reduction.
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