Avaliação e reprojeto de controladores PI/PID baseados em especificações de robustez.

Abstract

In this work, a proposal to redesign PI and PID Controllers is Presented. The starting point are methods known in the literature and the goal of the redesign is to improve robustness aspects of the losed loop. Based on frequencial information obtained experi-mentally, it is also presented a pro ess identi ation method to enable the application of originals methods. When restrictions to use the originals methods or robustness specifications are not met, one an parameterize the PI/PID controllers for a closed loop with the desired characteristics. The results analysis is performed with simulations to evaluate the methods for several lasses of processes and with experimental results.