Synthesis and implementation of supervisory control for manufacturing systems under processing uncertainties and time constraints
Rodrigo Szpak, Max Hering de Queiroz, José E.R. Cury · IFAC-PapersOnLine · 2020
In this paper, we exploit the supervisory control theory to synthesize a responsive control logic that assures non-blocking, safety, and time constraints in a manufacturing system subject to uncertain processing times arising from direct human intervention and flexible operations. A modular approach is used to compute a set of timed supervisors and a reduced coordinator that forces machine operations or inhibits human interventions in a minimally restrictive way. A new architecture for structured implementation of timed supervisors in programmable logic controllers is presented and applied to a real-world test-bench.