O uso da simulação no suporte a implementação da estrutura de controle supervisório

AUTOR(ES)

Carlos Alberto Vicari

DATA DE PUBLICAÇÃO

2008

RESUMO

Abstract: The growth of competitiveness in enterprises has forced them to reduce more the releasing time of their products. Consequently, the enterprise and academy s effort in providing techniques and tools for the reconfiguration of its systems is in force. A manufacturing system is a classical example of a Discrete-Event System (DES), for its dynamics develops according to the occurrence of discrete events over time. In this context, formal methods of DES modeling, analysis and synthesis, such as Supervisory Control Theory (SCT), have contributed for the solution of some problems, although there are still some limitations to this formalism, for instance, the centralization of the supervisor agent. Extensions of SCT, such as Local Modular Control (LMC), are alternatives in order to decentralize the supervisor agent and provide the reconfiguration of the manufacturing system more quickly. From this point, there is the requirement of elaborating a development sequence, made of steps. The first one is the DES modeling. The second one is the modular supervisors synthesis, and the third one is the implementation itself. In the latter, the theoretical model is translated to a language suited to the industrial platform, which presents the need of having validation methods before connecting the equipment to the manufacturing system. A possible validation method consists in simulating the controlling structure and inserting it gradually to the real system. This work assumes using the simulation as a support tool to the implementation of the supervisory control structure. By this modeling, the physical subsystems gradual migration to real physical subsystems is made possible, by using the technique known as Hardwarein-the-Loop (HiL), which assumes the validation of the control structure, achieved by the simulation and, gradually allows the insertion of the real controllers of the physical plant. Along the validation, the physical subsystems previously simulated are placed into the manufacturing system. Finally, an application example to the manufacturing system is projected. This way, the approach presented in this work is validated.

ASSUNTO(S)

computer simulation production engineering controle de produção engenharia de produção - dissertações produtos industrializados production control simulação (computadores) engenharia de producao processos de fabricação - automação manufacturing processes manufactures

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