ROBUST PERFORMANCE RESULTS FOR DISCRETE-TIME-SYSTEMS

The problems of robust performance and feedback control synthesis for a class of linear discrete-time systems with time-varying parametric u ncertainties are addressed in this paper. The uncertainties are bound and have a linear matrix fractional form. Based on the concept of stro ngly robust H-infinity-performance criterion, results of robust stabil ity and performance are developed and expressed in easily computable l inear matrix inequalities. Synthesis of robust feedback controllers is carried out for several system models of interest.