MULTIRATE FLUTTER SUPPRESSION SYSTEM-DESIGN FOR A MODEL WING

A new methodology for multirate control system design is described. It accommodates a general multiple-input, multiple-output control law st ructure that allows the sampling rates for the plant sensor output sig nals, the update rates fur the processor states, and the update rates for the plant control input signals to be independently specified. It includes a capability to design for multiple plant conditions so as to achieve robustness to plant parameter variations. Its analysis compon ents include a method for determining conventional gain and phase marg ins, a method for determining a bound on the smallest destabilizing un certainty, and a method for determining the maximum root-mean-square ( rms) gain of a multirate system. The methodology is demonstrated by ap plication to the design of a multirate flutter suppression system for a model wing.