| 一类闭环约束的装配约束问题求解 |
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| 引用本文： | 刘勇,雍俊海,王斌.一类闭环约束的装配约束问题求解[J].计算机辅助设计与图形学学报,2008,20(9). |
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| 作者姓名： | 刘勇 雍俊海 王斌 |
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| 作者单位： | 1. 清华大学软件学院,北京,100084;清华大学计算机科学与技术系,北京,100084;信息系统安全教育部重点实验室,北京,100084;清华信息科学与技术国家实验室,北京,100084
2. 清华大学软件学院,北京,100084;信息系统安全教育部重点实验室,北京,100084;清华信息科学与技术国家实验室,北京,100084 |
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| 基金项目： | 国家自然科学基金，国家重点基础研究发展计划(973计划)，国家高技术研究发展计划(863计划)，全国高等学校优秀博士学位论文作者专项基金，教育部霍英东教育基金 |
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| 摘 要： | 分析了一种可以拆分为等价的开环约束的装配闭环约束问题.给出了等价性的定义,并提出一种该类闭环约束拆分为等价开环约束的方法.首先确定装配几何约束图上的闭环,然后对该闭环利用自由度归约加扰动判定是否从某一条边拆开.该方法能够较好的简化CAD软件中用户添加的装配约束,避免了因闭环约束造成的求解复杂度增加的情况,同时可以更好的表达实际装配的过程.
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| 关 键 词： | 装配 约束求解 装配约束推理 闭环约束 |
Solving 3D Geometric Constraints for a Class of Closed-loop Assemblies |
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| Liu Yong,Yong Junhai,Wang Bin.Solving 3D Geometric Constraints for a Class of Closed-loop Assemblies[J].Journal of Computer-Aided Design & Computer Graphics,2008,20(9). |
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| Authors: | Liu Yong Yong Junhai Wang Bin |
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| Affiliation: | Liu Yong1,2,3,4) Yong Junhai1,4) Wang Bin1,4)1)(School of Software,Tsinghua University,Beijing 100084)2)(Department of Computer Science , Technology,Beijing 100084)3)(Key Laboratory for Information System Security,Ministry of Education,Beijing 100084)4)(Tsinghua National Laboratory for Information Science , Technology,Beijing 100084) |
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| Abstract: | In this paper, we study a class of closed-loop assemblies which can be converted into equivalent ones without loops. The definition of equivalence of geometric constraint graphs is presented and a method converting a closed-loop constraint graph into the equivalent open-loop one is proposed. This method firstly determines whether a closed loop exists in the graph, and utilizes DOF reduction analysis and disturbing method to identify if the closed-loop constraints can be broken from a certain edge. This meth... |
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| Keywords: | assembly constraint solving assembly constraint reasoning closed-loop |
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