Abstract
The authors consider the simultaneous problem of optimal robust stabilization and optimal tracking for single-input/single-output (SISO) systems in an L/sup /spl infin//-setting using a two-parameter compensator scheme. Optimal robustness is linked to the work done by Georgiou and Smith (1992) in the L/sup 2/-setting. Optimal tracking involves the resolution of L/sup 1/-optimization problems. The authors consider in particular the robust control of delay systems. They determine explicit expressions of the Bezout factors for general delay systems which are in the Callier-Desoer class /spl Bscr//spl circ/(0). Finally, they solve several general L/sup 1/-optimization problems and give an algorithm to solve the optimal robust control problem for a large class of delay systems.
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