BLOCK MULTIRATE INPUT OUTPUT MODEL FOR SAMPLED-DATA CONTROL-SYSTEMS

In this note, a detailed study of nonconventional sampled-data control systems (SDCS) is performed. The main contribution is a block multirate input-output model which illustrates the control possibilities of multirate SDCS. It is obtained from either a transfer function matrix or a state variable representation. This model gives a direct way to represent, design, and understand either periodic or predictive controllers. A controller design methodology suitable for multivariable, multirate, nonsynchronous SDCS is also presented. © 1990 IEEE