Controle Híbrido Adaptativo Tolerante a Falhas

Abstract

When designing a control system for an industrial process, it is desirable for it to satisfy the performance specifications, to be reliable, safe, and to have guaranteed stability. However, in the occurrence of components’ faults, such as sensors and actuators, system performance can deteriorate, resulting in loss of functionality, or even instability. Thus, it is important to design Fault Tolerant Control (FTC) systems, so that, even in the presence of faults, it is possible to guarantee the stability of the closed-loop system and ensure acceptable performance.This paper proposes a fault tolerant control approach using an adaptive hybrid PI (Proportional-Integral) controller for systems subject to actuator faults without the need to use a Fault Detection and Isolation (FDI) module. To verify the proposed methodology, computer simulations are performed considering different fault scenarios and comparisons with a classic PI and a hybrid controller without adaptation found in the literature.