Modeling and simulation technology oriented to machining-assembly combined production system

In view of the problem of collaborative production relationship between machining or assembly isolated by the separately modeling and simulation for each production system, the modeling and simulation technology oriented to machine-assembly combined production system, which supports the JIT (just-in-time) production pattern, is put forward. By importing the concept of the integrity assembly work station, the unified process description data structure for the combined production system is proposed and the collaborative production relationship between the machining and assembly is defined. Based on the hierarchical and interaction architecture of the workshop-work station-equipment, the modular modeling library embodied as the logic controller, corresponding with each level of the architecture, is constructed, and the lot-sizing process logic controller is also derived in order to reflect practice of the portfolio production. By utilizing the separation strategy between the physical model and control blocks, the layout and process data-driven rapid modeling methodology is brought forward on the basis of the mapping between the layout element and logic controllers. The task data-driven, hierarchical and modular simulation control mechanism is presented under the guidance of mapping methodology between the practical operation of the production system and the collaborating interaction among logic controller. The statistics of the equipment, queue and product driven by the simulation event is gathered and can support the optimization decision based on simulation. The optimization planning case of the task's production release time based on comparative analysis with such practical combined production system in a research institution shows that data-driven modeling and simulation technology can effectively be used for lean production decision.