DIGITAL CONTROL DESIGN BY THE POLYNOMIAL METHOD WITH EVALUATION OF THE SENSITIVITY FUNCTION

Leiliane Borges Cunha¹; Luís Augusto Mesquita de Castro¹; Antonio da Silva Silveira¹; Walter Barra Junior¹

¹ Universidade Federal do Pará

Baixar PDF doi:10.20906/CPS/CBA2018-0285

Resumo

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 a real systems, it is done the stability and robustness analysis of the control loop by means of the sensitivity function loop shaping. To evaluate the controller performance for such tunings, it is analyzed the integral perfomance indexes for the error and control effort. The difference 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.

Palavras-chave: Reference tracking; Disturbance rejection; Sensitivity function; Robustness analysis