关键词: 特征识别, 三层次属性邻接矩阵, 复杂相交特征, 薄壁结构件

Abstract: To solve the problem of recognizing both isolated and interacting features of these large thin-wall parts,a Hierarchical Attributed Adjacency Matrix (HAAM) model was put forward based on models' topological geometrical and special relationship information.The CAD model of both part and feature was represented,and a two phrase algorithm based on edge's convexity was designed for feature searching.A strategy based on HAAM was proposed to judge,revise,merge and split a interacting feature,so the interacting feature was recognized by finding out isolated features.The method had been implemented and tested with spacecraft structural parts on Pro/E platform.The experiment results showed the validity and accuracy of the algorithm.

Key words: feature recognition, hierarchical attributed adjacency matrix, complicated interacting features, thin-wall part