Multifacetted modelling and discrete event simulation
Multifacetted modelling and discrete event simulation
Object-oriented modeling and design
Object-oriented modeling and design
An integrated modelling method to support manufacturing systems analysis and design
Computers in Industry
Computers in Industry - ASI 1997
HoloMAS '07 Proceedings of the 3rd international conference on Industrial Applications of Holonic and Multi-Agent Systems: Holonic and Multi-Agent Systems for Manufacturing
Simulation based control program verification in an automobile industry
MIC '08 Proceedings of the 27th IASTED International Conference on Modelling, Identification and Control
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Proposed in the paper is an object-oriented methodology to create a virtual flexible manufacturing system (FMS) model. The proposed virtual FMS model consists of four types of objects: the virtual device model (object model), the transfer handler model (functional model), the state manager model, and the flow controller model (dynamic model). A virtual device model consists of two parts: shell and core. To improve the reusability of a virtual device model, the shell part is designed to adapt to different FMS configurations. For the fidelity of the virtual FMS model, a transfer handler model has a set of device-level commands imitating the physical mechanism of a transfer. As a result, we can expect more accurate simulation results. The flow controller model makes decisions on firable transfers based on decision variables, which are maintained by the state manager model. For the implementation of the proposed virtual FMS model, this paper employs Discrete Event Systems Specifications (DEVS) formalism, which supports the specification of discrete event models in a hierarchical, modular manner. The proposed virtual FMS model has been implemented and tested with many examples.