Abstract: Aiming at the challenge of creating digital twin models within highly flexible systems,a methodology for designing a flexible discrete event system modeling and simulation platform was proposed.The methodology initiated with a thorough analysis of requirements and proceeds to construct a logical model for platform design.Based on this logical model,a comprehensive platform design approach encompassing three critical aspects: simulation engine,flexible twin model modeling,and visualization,was presented.This methodology culminated in the development of the platform's overarching architecture.To facilitate seamless integration between the platform and digital twin models,a data interaction mechanism built upon the event advancement principles of physical entity states and the optimization-oriented algorithm-driven step-by-step iteration process was introduced.To validate the effectiveness of the approach,a prototype platform named NextING was developed and conduct comparative testing with commercial simulation software Plant Simulation.The efficiency of this methodology was demonstrated through case studies involving an assembly production line and a robotic mobile fulfillment system.

Key words: digital twin, flexible discrete event system, discrete event simulation,simulation platform design

摘要： 针对当前仿真平台难以在具有较高柔性的系统中建立数字孪生模型的问题,提出了面向数字孪生的柔性离散事件系统建模与仿真平台设计方法。该方法首先进行需求层次分析,建立平台设计逻辑模型指导设计,并基于该逻辑模型提出了平台在仿真引擎、柔性孪生模型建模、可视化三个方面的详细设计方法,建立平台总体架构。为实现平台与数字孪生相结合,提出了基于物理实体状态的事件推进机制和面向优化算法的仿真步进迭代机制的数据交互机制。最后,基于该设计方法开发了原型平台NextING并与商业仿真软件Plant Simulation进行对比测试,通过一个装配流水线实例以及一个移动机器人存取系统实例验证了该方法的有效性。

关键词: 数字孪生, 柔性离散事件系统, 离散事件仿真, 仿真平台设计