基于虚拟装配的车用高集成度传动装置动力学实时交互仿真技术研究

Vehicular transmission device is the key component of vehicle power transmission system. With the development of vehicle technologies, the power density and structural integration will be more and more higher. Virtual assembly and dynamics performance simulation of vehicular transmission device are the main means to improve its design ability，but their models are built separately based on their different special requirements. There is no way to take the coupling relationship into account between assembly features and dynamics performance, which also affects the precision of dynamics performance simulation. More than that, the change of assembly features is also quite difficult to obtain, such as the deflection of part which is caused by loads during the operation. The project is focus on the dynamics simulation of high integration vehicular transmission device based on virtual assembly model with real-time interaction. The main reaserch contents are as follows. Firstly, the modeling method of multi-properties parts for dynamics simulation is proposed based on virtual assembly. Secondly, the modeling method of assembly features is given based on contact and collision theory. Thirdly, the dynamics model of transmission device is built with real-time interaction technology using contact and collision theory. Based on all of these, the integration of virtual assembly and dynamics simulation is realized. The aim is to provide a new method to the forcast of dynamics performance, the structural design and analysis, which has an important theoretical and pratical significances on the improvement of design ability and the shortening of design period of high integration vehicular transmission device.

传动装置是车辆动力传动的关键部件，随着车辆技术的发展，传动装置的功率密度和结构集成度越来越高，虚拟装配和动力学性能仿真分析是提高其设计水平的主要手段，但两者的模型是针对不同需求分别建立的，无法考虑装配特征和动力学性能之间的耦合关系，影响动力学性能的仿真精度，难以获取运行过程中传动装置零部件受载变形等因素导致的装配特征变化。为此，本项目针对基于虚拟装配的车用高集成度传动装置动力学实时交互仿真技术，开展面向动力学仿真的虚拟装配多属性零件建模方法、基于接触碰撞理论的装配特征建模方法、虚拟装配下传动装置动力学建模与实时交互仿真技术等研究,实现虚拟装配和动力学性能仿真分析的集成，为传动装置的动态性能预测、结构设计与分析提供一种新的方法，对提升车用高集成度传动装置的设计水平、缩短研制周期具有重要的理论和实际意义。

传动装置是车辆动力传动的关键部件，随着车辆技术的发展，传动装置的功率密度和结构集成度越来越越高，虚拟装配和动力学性能仿真分析是提高其设计水平的主要手段。本项目针对基于虚拟装配的车用高集成度传动装置动力学实时交互仿真技术，开展面向动力学仿真的虚拟装配多属性零件建模方法、基于接触碰撞理论的装配特征建模方法、虚拟装配下传动装置动力学建模与实时交互仿真技术等研究。首先，以零件几何模型信息为基础，研究零件装配、动力学仿真所需属性信息，研究零件的物理属性与特征属性对动力学性能的影响以及在虚拟环境中的表征方法。其次，根据传动装置的结构特点，研究虚拟环境中零件装配特征的表征与识别、虚拟装配零件的精确定位与求解方法及基于接触碰撞的装配特征建模方法。以前两点内容为基础，建立传动装置的虚拟装配样机，研究虚拟装配下传动系统的动力学建模方法和实时交互仿真技术。最后以视景仿真平台为基础，构建虚拟试验场景，进行虚拟环境下传动装置动力学实时交互仿真平台研发与某传动装置动力学实时交互仿真分析与验证。对于以上研究内容，本项目已取得如下成果：1）完成了某传动装置关键零件的装配特征数据库；2）基于接触碰撞的装配特征建模方法；3）基于约束映射算法的虚拟装配下动力学建模方法；4）基于接触算法的花键装配特征模型与动力学模型；5）虚拟环境下数据手套控制技术研究；6）虚拟环境下基于装配特征的齿轮传动接触动力学仿真；7）虚拟环境下某传动装置动力学实时交互仿真分析与验证。上述研究，对提高传动装置功率密度，降低生产设计成本具有一定的学术与工程意义。