一种基于层次消息的铁路三维设计同步机制

摘要

面向铁路三维计算机协同设计平台的研制,针对多专业在线设计人员多,设计场景同步过程中的数据模型复杂、传输数据量大和难实时响应等难题,提出以设计过程交互事件驱动的层次消息同步机制,确保专业间与专业内设计人员的操作场景与设计数据的协同. 根据铁路系统设计流程,建立设计过程不同阶段中各个专业之间相互影响的层次关系图,并据此建立专业间层次消息更新机制,通过交互事件的驱动生成同步消息,利用专业间的层次关系建立消息定向传输机制,从而减少针对所有对象的广播式消息同步. 在新建铁路三维计算机协同设计系统中的实践测试中,该方法有效地减少同步次数与数据传输量,提高了协同效率.%Focusing toward the development of 3D computer collaborative design platform for railway, in this paper we propose the hierarchical messages synchronisation mechanism driven by the interactive events in design process aiming at the difficulties including so many online designers in multiple specialities, complicated data models in synchronisation process of scenes design, large volume of data transmission and hard to timely respond, etc., to guarantee the collaboration of the design data and the operation scenes of the designers amongst the specialities and within the speciality.According to railway system design flow, we construct the hierarchical relationship map of mutual influences between each speciality in different phases of design process, and set up update mechanism of hierarchical message amongst the specialities accordingly, the synchronised messages are generated through the drive of interactive events, and the hierarchical relations amongst the specialities are employed to build directional massage transmission mechanism so as to reduce the broadcast-based message synchronisation for all objects.In practical test of 3D computer collaborative design system for the railway newly constructing, this method effectively reduces synchronisation times and data transmission volume, and raises the collaboration efficiency as well.