Synthesis of Model Following Servo Controller for Multivariable Linear System

This paper considers the model following servo system synthesis method in which optimization techniques like Kreindler are used to design controllers that make the step response of the plant should be kept close to a specified ideal step response of the model. The controller is named model following servo and has several useful characteristics as follows. (1) The controller includes the servo controller to exclude the offset in the presence of the constant disturbances or the parameter perturbations of the plant. (2) The controller for constant reference signals and constant disturbances is treated in this paper, but its generalization to more general reference signals and disturbances can be easily done. (3) The performance of the controller is as good as that of the adaptive model following controllers. (4) The structure of the controller is simpler than that of the adaptive ones. Two examples demonstrated the above mentioned characteristics.