Abstract
This paper presents an application of the multivariable model reference adaptive control (MRAC) approach to a three-input three-output process control system. Since this system has small leading coefficients, the control inputs vibrate violently when the basic MRAC scheme is applied. In order to reduce the input vibrations, the basic MRAC scheme is modified so that the transfer function matrix between the control inputs and the system disturbances in the closed loop includes some adjustable parameters, and two methods to determine these parameters are proposed. Experimental results show that good performance in the input smoothing are obtained by the proposed MRAC scheme without degrading the tracking ability to the model reference output sequences.
