A SUBSYSTEM DESIGN APPROACH TO CONTINUOUS-TIME PERFORMANCE OF DECENTRALIZED MULTIRATE SAMPLED-DATA SYSTEMS

A decentralized controller design is presented for multirate sampled-d ata systems, where stability and input-output performance are consider ed in terms of continuous-time signals. The design procedure consists of analysis for the overall system and controller synthesis for indivi dual subsystems. For the subsystem designs, a unique technique of remo ving lifting operation which is used in the analysis is proposed. Robu st performance and robust stability in terms of continuous-time signal s can be achieved by using the proposed design. A numerical example sh ows that the design method results in satisfactory controllers which g uarantee closed-loop stability and performance in continuous time.