Online Activation and Deactivation of a Petri Net Supervisor
Abstract
This paper highlights algebraic and mathematical properties in symmetry with Petri
nets in order to control automated systems such as flexible workshops, which represent one of
the most important examples in industry and for discrete event systems in general. This project
deals with the problem of forbidden state transition by using a new application of the theory of
regions for supervisory control. In the literature, most control synthesis methods suffer greatly from
a cumbersome calculation burden of the Petri net supervisor given the complex exploration of the
state graph. Our new methodology lightens the computational load of the Petri net supervisor by
choosing specific regions on the reachability graph, on which the control is calculated offline using
CPLEX. The determined controller is activated online if the process enters the chosen region, and
deactivated otherwise. All our experiments were applied in a flexible workshop implemented in our
research laboratory, which was used to engrave selected models on glass blocks of different color.
Origin | Files produced by the author(s) |
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