Contribuições ao Controle PI-SITO para uma Classe de Sistemas TISO

Abstract

Processes with multiple inputs and a single output are usual in industries. These processes present more than one actuator driving a single process variable. Analyzing a Two- Input Single-Output (TISO) process that is composed of two actuators to achieve a single process variable. Recent literature presents a Single-Input Two-Output (SITO) controller strategy, based on the Proportional (P) and Integral (I) control actions separated and paired individually, thus changing the nature of a PI-SISO (Single-Input Single-Output) to a PI-SITO. However, in the literature, it was not justified the choice of the pairing of the control actions, it was possible to observe the literature it was adopted a bias for the Proportional action, but it was not demonstrated how to choose the value of the bias. In this sense, the present study explains the matching of control actions and proposes a systematic methodology for bias selection. This adopted analyses utilizing mathematical deductions and experiments, employing computer simulations. The present study delivers the justification for the pairing of control actions proposed in the literature and a precept of the bias choice enabling an achievable implementation of the PI-SITO controller.