基于特征参数化方法的异构CAD卫星三维协同布局设计  

Based on Characteristic Parameters Method Satellite 3D Co-layout with Heterogeneous CAD

作　　者：王耀东[1] 魏强[1] 李学林[1] 王新翔 WANG Yaodong;WEI Qiang;LI Xuelin;WANG Xinxiang(Institute of Telecommunication Satellite？China Academy of Space Technology,Beijing 100094,China)

机构地区：[1]中国空间技术研究院通信卫星事业部,北京100094

出　　处：《航天器工程》2018年第4期28-33,共6页Spacecraft Engineering

摘　　要：针对卫星异构CAD间的基于模型的定义(Model Based Definition,MBD)三维模型批量转换和协同布局设计过程中存在的信息丢失、效率较低等问题,文章提出一种应用特征参数化方法的三维模型转换方法,对MBD三维模型的几何特征与非几何特征进行结构化、参数化,通过可扩展标记语言(Extensible Markup Language,XML)技术实现参数数据的跨CAD系统转换。同时,基于此方法,对三维模型的位置、旋转角度等布局特征进行参数化表达,通过XML表单共享布局数据,驱动不同CAD系统内自动创建布局模型,避免了跨CAD系统的复杂装配模型的频繁互相转换。基于二次开发,实现了上述方法的自动化,并应用于实际卫星研制中,验证了方法的可行性和有效性,此方法可为各类异构CAD系统间三维模型转换提供参考。For the problem of information loss and low efficiency in the process of model based definition（MBD）3 Dmodel transformation and collaborative layout design of heterogeneous CAD.A method of 3 D model transformation based on characteristic parameters is put forward.This method is based on the geometrical and non-geometrical characteristics of 3 D model structured,parameterized,through extensible markup language（XML）technology to achieve parameter data conversion across CAD systems.Based on this method,position,rotation angle and other layout features of the 3 D model are parameterized.Sharing layout data through XML forms drives the automatic creation of layout models in different CAD systems,avoiding frequent transformation of complex assembly models across CAD systems.Finally,based on the secondary development,the above method is automated and applied to the satellite development,which verified the feasibilityand effectiveness of the method.This method can provide reference for the 3 Dmodel transformation between various heterogeneous CAD systems.

关 键 词：三维模型 特征参数化 异构CAD系统 可扩展标记语言 协同布局 

分 类 号：TP391.72[自动化与计算机技术—计算机应用技术]