Avaliação de desempenho de malhas de controle.

Abstract

The main objective of control systems is to maximize proĄts by increasing productivity. However, control systems will deteriorate over time, and consequently productivity is afected. Thus, it is necessary to carry out periodic maintenance on the control systems to maintain the quality of the processes. In order to change the practice of maintaining control in the process industries, from scheduled or reactive to anticipatory, centered on the continuous assessment and forecast of the degradation of the performance of the control systems, diferent loop assessment techniques are studied in this work, to assist in the diagnosis of the main control problems. Most of the techniques studied in this work were developed from the theory of optimal prediction and the minimum variance control, and were implemented in the evaluation software developed during this work.