基于特征的MBD模型检索方法研究  

Research of MBD Model Retrieval Method Based on Feature

作　　者：周阳 于勇[1] 顾黎 赵罡[1,3] ZHOU Yang;YU Yong;GU Li;ZHAO Gang(School of Mechanical Engineering and Automation,Beihang University,Beijing 100191,China;Key Laboratory of Aeronautics Smart Manufacturing,Ministry of Industry and Information Technology,Beijing 100083,China)

机构地区：[1]北京航空航天大学机械工程及自动化学院,北京100191 [2]北京宇航系统工程研究所,北京100076 [3]航空高端装备智能制造工信部重点实验室,北京100083

出　　处：《组合机床与自动化加工技术》2018年第10期151-155,160,共6页Modular Machine Tool & Automatic Manufacturing Technique

基　　金：工信部2016民用飞机专项科研技术研究项目

摘　　要：为解决现有三维模型检索方法难以满足MBD模型相似性对比的问题,提出了一种基于特征的MBD模型检索方法。首先,采用CAD系统二次开发技术提取MBD模型特征参数信息,并以模型检索为目的,结构化表达MBD模型信息。其次,根据MBD模型信息,以特征及其参数信息为结点、特征依赖关系为边构建有向无环图。最后,给出基于非精确图匹配的MBD模型几何信息层相似性对比方法;并且考虑非几何信息层,实现了综合几何信息与非几何信息的MBD模型检索。检索实验结果表明,相比于传统CAD模型检索方法,文章提出的方法能够检索出工艺信息重用价值更高的MBD模型。A MBD model retrieval method based on feature was proposed to solve the problem that existing 3D model retrieval methods could not satisfy the similarity comparison of MBD model.Firstly,MBD model feature parameters extraction were completed and then stored in the proposed structure for the purpose of model retrieval by CAD system secondary development technology.Secondly,the feature dependency directed acyclic graph of MBD model was constructed according to the MBD model information with the feature parameters information as nodes and the feature dependency as edge.Finally,the similarity comparison of geometric information was proposed based on inexact graph matching.Further considering the non-geometric information layer,MBD mod-el retrieval was completed based on both geometric and non-geometric information.The experimental results shown that the method we proposed received the MBD model with higher process information reuse value compared with traditional CAD model retrieval method.

关 键 词：MBD模型 特征 几何信息 非几何信息 模型检索 

分 类 号：TP166[自动化与计算机技术—控制理论与控制工程] TG80[自动化与计算机技术—控制科学与工程]