基于特征的异构全三维数字化模型转换方法研究与实现
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摘要
针对全三维数字化定义模型在异构CAD系统间转换时会丢失特征和非几何信息的问题,综合考虑几何信息、非几何信息及二者的关联关系,提出一种基于特征的异构全三维数字化定义模型转换方法。使用可扩展标记语言对三维模型的特征信息与工程注释信息及其关联关系进行表达;以可扩展标记语言文件作为中间文件,经过信息提取和信息重构,同时转换几何特征信息和工程注释信息,并保持二者间的关联关系,实现全三维数字化定义模型在异构CAD系统间的转换;以某型号飞机的结构件为例,在Pro/E和CATIA系统间验证了方法的有效性。
To solve the problem of feature and non-geometrical information loss in exchanging Model Based Definition(MBD)model data among heterogeneous CAD systems,by considering the geometric feature information,the nongeometrical information and the association between them,a feature-based heterogeneous 3Ddigital definition model exchange method was proposed.Extensible Markup Language(XML)was used to represent the feature information and non-geometrical information of 3Ddigital definition model and the association between them.The exchange of3 Ddigital definition model among heterogeneous CAD systems was achieved through the information extraction and reconstruction,and the geometric feature information and engineering note information were transformed at the same time and the relationships between them were remained.A structural model of a certain type of aircraft was introduced as an example to verify the validity of the model data exchange between Pro/E and CATIA.
To solve the problem of feature and non-geometrical information loss in exchanging Model Based Definition(MBD)model data among heterogeneous CAD systems,by considering the geometric feature information,the nongeometrical information and the association between them,a feature-based heterogeneous 3Ddigital definition model exchange method was proposed.Extensible Markup Language(XML)was used to represent the feature information and non-geometrical information of 3Ddigital definition model and the association between them.The exchange of3 Ddigital definition model among heterogeneous CAD systems was achieved through the information extraction and reconstruction,and the geometric feature information and engineering note information were transformed at the same time and the relationships between them were remained.A structural model of a certain type of aircraft was introduced as an example to verify the validity of the model data exchange between Pro/E and CATIA.
引文
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[16]LU Hu,HAN Shuang,FAN Yuqing.Model based digital definition technology[J].Aeronautical Manufacturing Technology,2008(3):78-81(in Chinese).[卢鹄,韩爽,范玉青.基于模型的数字化定义技术[J].航空制造技术,2008(3):78-81.]
[2]ALEMANNI M,DESTEFANIS F,VEZZETTI E.Modelbased definition design in the product lifecycle management scenario[J].The International Journal of Advanced Manufacturing Technology.2011,52(1/2/3/4):1-14.
[3]CAMBA J,CONTERO M,JOHNSON M,et al.Extended3Dannotations as a new mechanism to explicitly communicate geometric design intent and increase CAD model reusability[J].Computer-Aided Design,2014,57(1):61-73.
[4]TESSIER S,WANG Y.Ontology-based feature mapping and verification between CAD systems[J].Advanced Engineering Informatics,2013,27(1):76-92.
[5]QIN F,GAO S,YANG X,et al.An ontology-based semantic retrieval approach for heterogeneous 3DCAD models[J].Advanced Engineering Informatics,2016,30(4):751-768.
[6]HOFFMANN C M,JUAN R.Erep:an editable,high-level representation for geometric design and analysis[C]//Proceedings of the Ifip Tc5/wg5.2 Working Conference on Geometric Modeling for Product Realization.Amsterdan,the Netherlands:North-Holland Publishing,1992:129-164.
[7]CHOI G H,MUN D,HAN S.Exchange of CAD Part Models Based on the Macro-Parametric Approac[J].International Journal of CAD/CAM,2002,2(1):13-21.
[8]MUN D,HAN S,KIM J,et al.A set of standard modeling commands for the history-based parametric approach[J].Computer-Aided Design,2003,35(13):1171-1179.
[9]RAPPOPORT A.An architecture for universal CAD data exchange[C]//Proceedings of Eighth ACM Symposium on Solid Modeling and Applications 2003.New York,N.Y.,USA:ACM,2003:266-269.
[10]RAPPOPORT A,SPITZ S,ETZION M.Two-dimensional selections for feature-based data exchange[C]//Proceedings of Geometric Modeling and Processing-GMP 2006.Berlin,Germany:Springer-Verlag,2006:325-342.
[11]SPITZ S,RAPPOPORT A.Integrated feature-based and geometric CAD data exchange[C]//Proceedings of the Ninth ACM Symposium:Solid Modeling&Applications.New York,N.Y.,USA:ACM,2004:183-190.
[12]LI X,CAI X,HE F,et al.Retrieval and reconstruction of heterogeneous feature data for collaborative design[C]//International Conference on Computer Supported Cooperative Work in Design.Washington,D.C.,USA:IEEE,2010:553-558.
[13]LI X,HE F,CAI X,et al.CAD data exchange based on the recovery of feature modelling procedure[J].International Journal of Computer Integrated Manufacturing,2011,25(10):1-14.
[14]ZHANG D J,HE F Z,HAN S H,et al.Quantitative optimization of interoperability during feature-based data exchange[J].Integrated Computer Aided Engineering,2015,23(1):31-50.
[15]FAN Yuqing.Model based definition technology and its practices[J].Aeronautical Manufacturing Technology,2012(6):42-47(in Chinese).[范玉青.基于模型定义技术及其实施[J].航空制造技术,2012(6):42-47.]
[16]LU Hu,HAN Shuang,FAN Yuqing.Model based digital definition technology[J].Aeronautical Manufacturing Technology,2008(3):78-81(in Chinese).[卢鹄,韩爽,范玉青.基于模型的数字化定义技术[J].航空制造技术,2008(3):78-81.]