• CN:11-2187/TH
  • ISSN:0577-6686

›› 2007, Vol. 43 ›› Issue (12): 59-63.

• 论文 • 上一篇    下一篇

干涉检验优化算法及其在车辆电磁制动器虚拟装配系统中的实现

江洪;侯剑波;丁家翔;周孔亢   

  1. 江苏大学机械工程学院;江苏大学汽车与交通工程学院
  • 发布日期:2007-12-15

OPTIMIZING ALGORITHM OF INTERFERENCE CHECKING AND IT’S IMPLEMENT IN VEHICLE ELECTRIC-BRAKE VIRTUAL ASSEMBLY SYSTEM

JIANG Hong;HOU Jianbo;DING Jiaxiang;ZHOU Kongkang   

  1. College of Mechanical Engineering, Jiangsu University College of Automotive and Traffic Engineering, Jiangsu University
  • Published:2007-12-15

摘要: 干涉检验是基于虚拟现实设计系统的关键技术,然而利用传统几何求交的方法进行干涉检验效率低、耗时长,已远不能满足实时精确干涉检验的要求。首先对比包围球、沿坐标轴的包围盒以及方向包围盒三种干涉检验优化方法,给出采用基于沿坐标轴的包围盒分解快速干涉检验方法的理论依据及算法的流程图。通过构建层次包围盒逐渐逼近几何实体,排除不可能发生干涉的部件,这样可大大减少干涉检验的运算量并提高算法效率。最后在基于三维软件Unigraphics(UG)开发的车辆电磁制动器虚拟装配系统中,实现了基于沿坐标轴的包围盒分解快速干涉检验的算法,使用该算法前后的对比试验可验证该算法的优越性。对比试验的结果证明,基于沿坐标轴的包围盒分解快速干涉检验算法能有效地减少复杂对象干涉检验的运算时间,具有广泛的应用前景。

关键词: 包围盒分解, 干涉检验, 沿坐标轴的包围盒

Abstract: Interference detection is the key technology of design system based on virtual reality, however, with low efficiency and long time-consuming, traditional geometry intersection method is far from the requirement of real-time precise interference detection of complex objects. With the comparison of sphere-tree, axis-aligned bounding box (AABB) and oriented bounding box(OBB) optimizing algorithms, the theoretical basis and flow chart of swift interference detection based on AABB decomposition is presented. Hierarchical bounding box is constructed to approach geometry solid gradually, the components which are impossible to cause interference are removed, so the operand of interference detection is decreased greatly and the efficiency of algorithm is improved. At last, the optimizing algorithm of the interference checking is applied in virtual assembly system electric-brake virtual assembly system, which is developed in Unigraphics(UG) by comparing the operating time with or without the above algorithm. The comparison experiment results show that the AABB optimizing algorithm of the interference checking can shorten the operating time for complicated objects and show very extensive applied prospects.

Key words: Axis-aligned bounding boxes(AABB), Bounding boxes decomposition, Interference detection

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