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| 基于局部特征识别的特征有效性维护方法 |
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陈正鸣1,2, 高曙明1, 彭群生1
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1.浙江大学,CAD&CG国家重点实验室,浙江,杭州,310027;2.河海大学,计算机与信息工程学院,江苏,常州,213022
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| 摘要: |
| 缺乏特征模型的有效性维护功能已经成为目前特征造型系统存在的一个严重而亟待解决的问题.在对特征有效性条件进行深入分析的基础上,提出了一个基于扩展属性邻接图(extended attributed adjacency graph,简称EAAG)的特征有效性表示方法,特别是提出了基于局部特征识别的特征有效性维护新方法.该方法不仅能够自动判别特征的有效性是否被破坏,而且能确定导致特征无效的原因和遭破坏后特征的状态,从而能够根据用户的意图自动维持特征模型的有效性. |
| 关键词: 特征 特征造型 特征有效性 特征识别 CAD/CAM |
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| 基金项目:国家自然科学基金资助项目(69973045);国家创新研究群体科学基金资助项目(60021201) |
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| Feature Validity Maintaining Approach Based on Local Feature Recognition |
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CHEN Zheng-ming,GAO Shu-ming,PENG Qun-sheng
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| Abstract: |
| Lacking of feature validity maintaining function has become a serious problem with existing feature modeling systems. In this paper, a representation for feature validity condition based on the extended attributed adjacency graph is proposed, and a novel approach is particularly proposed to feature validity maintaining using local feature recognition technique. The approach can not only automatically detect if the feature validity is destroyed, but also accurately determine the reason why the feature becomes invalid and the state of the destroyed feature.Furthermore,the approach can automatically renovate feature model based on the user's intention. |
| Key words: feature feature modeling feature validity feature recognition CAD/CAM |
