Controle Supervisório Tolerante a Falhas de Sistemas a Eventos Discretos: Estudo de Caso

Bruno Mota; Samuel Oliveira; André B. Leal

doi:10.20906/SBAI-SBSE-2023/3914

Bruno Mota Grupo de Pesquisa em Automação de Sistemas e Robótica (GASR) Universidade do Estado de Santa Catarina, Joinville/SC
Samuel Oliveira Departamento de Ciências Exatas e Tecnológicas Universidade Federal do Amapá, Macapá/AP / Programa de Pós-Graduação em Engenharia Elétrica Universidade do Estado de Santa Catarina, Joinville/SC
André B. Leal Programa de Pós-Graduação em Engenharia Elétrica Universidade do Estado de Santa Catarina, Joinville/SC

DOI: https://doi.org/10.20906/SBAI-SBSE-2023/3914

Keywords: Discrete event systems, fault-tolerant control, fault-hiding, Modular control, Virtual plant

Abstract

In this work, we address the problem of supervisory control tolerant to intermittent faults in manufacturing systems modeled as discrete event systems (DES). Two fault tolerance approaches were applied to a case study developed on a virtual plant using Factory IO software: active approach and fault-hiding. In both cases, a diagnoser automaton was used to detect fault occurrences. Modular supervisors were designed based on the supervisory control theory of DES, and the fault-tolerant control structure was implemented in a PLC, controlling the virtual plant via the OPC communication protocol. Different strategies for implementing the fault-tolerant control structure are proposed and applied to the case study, resulting in the proper functioning of the plant, even with the intermittent occurrence of faults.