Partial Reconfiguration of Control Systems using Petri Nets Structural Redundancy
Keywords: Discrete Events, Control Systems, Reconfiguration, Structural Redundancy, Petri nets
AbstractThis paper deals with the partial reconfiguration of the discrete control systems due to resource failures using the structural redundancy of the global system model. The approach herein proposed introduces a new subclass of Interpreted Petri Nets (IPN), named Interpreted Machines with Resources (IMR), allowing representing both the behaviour of a system and the resource allocation. Based on this model, an efficient reconfiguration algorithm is proposed; it is based on finding the set of all redundant sequences using alternative resources. The advantages of this structural reconfiguration method are: (1) it provides minimal reconfiguration to the system control assuring the properties of the original control system, (2) since the model includes resource allocation, it can be applied to a variety of systems such as Business Processes, and FPGAs, among others. The method is illustrated through a case study dealing with a manufacturing system controller that includes both alternative resources and operation sequences.
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