15th Triennial World Congress of the International Federation of Automatic Control
  Barcelona, 21–26 July 2002 
DESIGN OF MULTIRATE OUTPUT CONTROLLERS WITH AN ENGINEERING APPLICATION
Daniel E. Viassolo* Mario A. Rotea**
* Xerox Innovation Group, Xerox Corp., 800 Phillips Rd., Webster,
NY 14580, U.S.A., dviassolo@crt.xerox.com
** Purdue University, 1282 Grissom, West Lafayette, IN 47907, U.S.A.,
rotea@purdue.edu

This paper gives a method to compute a controller that places closed-loop poles in a specified region, has an order equal to the number of plant control inputs and, under some assumptions, has prescribed controller dynamics. The proposed controller samples the plant outputs at a rate faster than the rate used for updating the control inputs; it is a multirate output controller or MROC. A systematic design method is proposed to mitigate the typical high sensitivity to measurement noise of MROCs. An application to the control of lightly damped structures is described.
Keywords: Digital Control, Control System Design, Convex Optimization, Pole Assignment
Session slot T-We-A14: Issues in Digital Control/Area code 2a : Control Design