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Contribution à la gestion des perturbations dans les systèmes manufacturiers à contraintes de temps

Abstract : The works proposed in this thesis are interested in controlling and monitoring of a particular class of production system : manufacturing job-shops with time constraints. We suppose in the study that the resources are allocated and the operations order is fixed by the module of planning/scheduling. The assumptions of repetitive functioning mode with and without assembling tasks are adopted. For this type of problems, the formalism of P-time Petri nets is used in order to study the operations time constraints.A study of the robustness of the manufacturing workshop to time constraints, has been developed. The robustness is approached with and without control reaction qualified as active robustness and passive robustness respectively, towards time disturbances. A computing algorithm of the upper bound of the passive robustness is presented. In addition, three robust control strategies facing time disturbances were developed.Furthermore, uncertainty in manufacturing systems has been studied. Our contribution in this context is by integration of the analytical knowledge of the robustness in the filtering mechanism of sensors signals that are associated to operations, by using fuzzy logic.Starting from a controlled system, we have presented in detail, a method to be followed for the implementation of a monitoring model based on the chronicles and fuzzy fault tree analysis. This approach is applied to a milk production unit
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Submitted on : Monday, August 1, 2011 - 1:18:00 AM
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  • HAL Id : tel-00612819, version 1



Anis M'Halla. Contribution à la gestion des perturbations dans les systèmes manufacturiers à contraintes de temps. Autre. Ecole Centrale de Lille; École nationale d'ingénieurs de Tunis (Tunisie), 2010. Français. ⟨NNT : 2010ECLI0008⟩. ⟨tel-00612819⟩



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