离散事件驱动的可扩展物流仿真技术

Extensible Real-time Logistics Simulation Driven by Discrete Events

通过分析仿真方法对于现代物流系统研究的重要性,提出由离散事件驱动、利用虚拟场景建模理论、具有高度可扩展性的物流仿真技术。以运动仿真的动态纠偏和快捷的故障处理为目标,详细介绍状态信息的采集和识别技术、基于工作调度的任务管理机制、真实感渲染环境的建立准则,以及面向对象的可扩展实体建模方法。在此基础上,重点阐述物流作业的离散事件驱动机制、对象行为自治的动态建模策略、时间推进下设备的运动仿真等关键技术,并综合利用高斯积分、弦割法等数值方法给出设备绝对坐标的计算算法。基于可视化技术构建的物流仿真平台具有可扩展性、开放性和通用性等优点,在企业应用中有较好的可行性。

Considering the importance of simulation method to the research of modem logistics system, an extensible simulation technology is proposed, which is driven by discrete events and utilizes modeling theory of virtual scenario. The technique of state information collecting ＆ identification, task management mechanism basedon work scheduling, the rules for the establishment of 3D rendering evironment as well as the strategy of object-oriented 3D-modelling is elaborated. On this basis, several key technologies are particularly analyzed, including the drive mechanism of discrete events, the autonomous principles of objects behavior and equipment motion simulation under time advance, etc. Numeric algorithm synthesizing Gaussian integration, iterative method and Newton＇s method is introduced to figure out the absolute coordinates of equipment. The logistics simulation platform co nstructed on the basis of visualization technology has the advantages of expandability, openness and universality. Additional instance is presented finally, to illuminate the effectiveness and feasibility of applying the platform mentioned above to logistics industry.