Implementation of local modular supervisory control for a pneumatic system using PLC

PLC-Based Implementation of Local Modular Supervisory Control for Manufacturing Systems

“…In (Hasdemir et al, 2004) the authors propose the use of two bits for each state in order to solve the avalanche effect, but none of the other problems are discussed. In addition, only a single event is processed per supervisor at each PLC scan cycle.…”

“…Local Modular approach is used because systems of greater complexity that have a big amount of machines (and then, events) usually can be modelled as many concurrently interacting and simpler subsystems. Matko, 2002;Queiroz & Cury, 2002;Chandra et al, 2003;Hasdemir et al, 2004;Manesis & Akantziotis, 2005;Vieira et al, 2006, Morgenstern & Schneider, 2007Noorbakhsh & Afzalian 2007a&b;Afzalian et al, 2008;Hasdemir et al, 2008;Noorbakhsh, 2008;Silva et al, 2008;Leal et al, 2009;Possan & Leal, 2009;Uzam et al, 2009). In most of these works the monolithic approach (Ramadge & Wonham, 1989) for the supervisors' synthesis is used, in which a single and usually large supervisor is computed to control the entire plant.…”

Application of the supervisory control theory in the project of a robot-centered, variable routed system controller

“…The authors say that such bottlenecks are being considered as a controlling problem, linked to the coordination of the various activities regarding certain processes. That is due to the utilization of fundamentally intuitive techniques for the project and execution of the logic control, as mentioned by [3] and [7]. Automated systems, in which different product families are produced, are characterized by resource sharing and production routing variation, which adds an extra complexity to the logic project and execution stages.…”

Application of the supervisory control theory to automated systems of multi-product manufacturing

“…According to Chandra et al [1] and Hasdemir et al [7], the strategies for conception of control logics of these systems are fundamentally intuitive. In this sense, structuring at the conception stage of the logical project is fundamental to redesigning and reconfiguring systems.…”