关键词: 数字孪生车间, 虚拟实体, 基于值的离散事件系统规范, 行为模型, 离散制造

Abstract: Virtual entity is an important part of digital twin five-dimensional model,and its behavior model describes the real-time response and behavior of physical entity under the action of external environment as well as internal operation mechanism.To solve the problem of lacking uniform description and precise definition of virtual entity behavior model in discrete manufacturing workshop,a behavior model description method based on Value-based Discrete Event System Specification (VDEVS) was proposed.On the basis of the original digital twin five-dimension model,the hierarchical virtual entity model of discrete manufacturing workshop was defined,and the one-to-one mapping between this model and the physical entity of digital twin workshop was realized.By extending the traditional Discrete Event System Simulation specification (DEVS),VDEVS was more accurately describe the behavior of complex system-level,system-level and cell-level virtual entities in discrete manufacturing workshops.For one machining unit,VDEVS was used to describe its behavior model.

Key words: digital twin workshop, virtual entity, value-based discrete event system specification, behavioral model, discrete manufacturing