基于物理属性的虚拟对象行为仿真研究

Behavior Simulation of Virtual Object Based on Physical Property

目前虚拟装配/维修研究中提出的基于物理属性的建模与仿真方法由于求解复杂性和仿真实时性的要求,较难在实际仿真过程中得到应用。简要分析了虚拟仿真中基于物理属性的建模与仿真研究的现状。提出了产品层次信息模型及其实现方法,给出了基于物理属性快速建模方法。建立了通过矩阵来描述虚拟对象行为特性的方法,基此给出抓取/放置、移动和意外跌落情况下虚拟对象的行为特性描述。分析了虚拟对象的行为仿真方法,包括力的输入方法与力反馈的方法,结合一个具体工程示例,给出了产品行为特性仿真及其工程应用。

At present, because of the complexity and real-time requirement, the modeling and simulation method proposed in virtual assembly and maintenance based on physical property is difficult to apply. The development actuality of modeling and simulation method based on physical property is simply investigated. Product hierarchy information model and its implementation method are established, and fast modeling method based on physical property is presented. Behavior property description of virtual object using matrix is established and behavior property of virtual object is depicted in cases of grasp/placement, movement and drop. Behavior simulation method including force input method and force feedback method is analyzed. Behavior simulation and its engineering application are demonstrated based on an actual engineering example.