Partial Reconfiguration of Control Systems using Petri Nets Structural Redundancy
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Data
2015Autor
Alcaraz-Mejía, Mildreth
Campos-Rodríguez, Raúl
López-Mellado, Ernesto
Ramírez-Treviño, Antonio
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This 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, (3) it takes advantage of the implied features of Petri net models, such as structural analysis and graphical visualization of the system and control. The method is illustrated through a case study that deals with a manufacturing system controller, which includes both alternative resources and operation sequencesITESO, A.C.
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