DIGITAL CONTROL DESIGN BY THE POLYNOMIAL METHOD WITH EVALUATION OF THE SENSITIVITY FUNCTION
This paper presents two tuning design possibilities for an incremental digital RST controller based on the pole placement technique, whose parameters are obtained by solving the Diophantine equation. Since output and input disturbances occur in real systems, it is done the stability and robustness analysis of the control loop by means of the sensitivity functions loop shaping. To evaluate the controller performance for such tunings, it is analyzed the integral perfomance index for the error and control eort. The dierence between the tuning designs is presented by numerical simulation for a underdamped second order system, showing that the proposed method can provide solutions with good performance.