基于扩展干涉矩阵的几何可拆卸性判别方法  

Method for Determination of Geometric Dismountability Based on Extended Interference Matrix

作　　者：于嘉鹏[1,2] 邢宇飞[1,2] 王成恩[1,2] 

机构地区：[1]东北大学流程工业综合自动化国家重点实验室,沈阳110004 [2]东北大学辽宁省复杂装备多学科设计优化技术重点实验室,沈阳110004

出　　处：《机械工程学报》2011年第21期146-156,共11页Journal of Mechanical Engineering

基　　金：解放军总装备部武器装备预研基金(9140A18010207LN0101);国家自然科学基金(51105069);沈阳市科学技术计划(1091032-4-00)资助

摘　　要：零部件的几何可拆卸性(Geometric dismountability,GD)是基于'以拆卸序列求装配序列'策略的装配序列规划的前提,干涉矩阵是对其进行判别的重要装配关系模型。为解决零部件在非标准正交轴向上的GD判别难题,提出扩展干涉矩阵(Extended interference matrix,EIM)模型,将现有干涉矩阵结构扩展到零部件局部坐标系轴向。为了便于分析具有复合拆卸路径方向的零部件GD,提出转折式干涉矩阵(Turning interference matrix,TIM)模型,以紧凑的结构描述转折点处完备的干涉信息。为了快速、准确地获取干涉矩阵,提出步进式精检测、基于包围盒的粗检测和加速式检测等自动检测方法,以及静态硬干涉自动屏蔽法。基于EIM和TIM,提出更全面的零部件GD判别算法及流程。开发基于UG NX的全自动装配规划系统AutoAssem,以实例验证各干涉检测措施的有效性,说明EIM和TIM丰富了拆卸方向的多样性和可变性,使GD判别具有面向复杂产品的通用性,为后续序列规划算法提供了有效依据。Geometric dismountability（GD） of component is the premise for assembly sequence planning based on ＂acquire assembly by disassembly＂,while interference matrix is an essential assembly relation model for determination of GD.To solve the problem of GD determination in the directions not parallel to the standard orthogonal coordinate axes,extended interference matrix（EIM） is proposed,whose structure is extended to directions of local coordinate axes of each component.To facilitate analysis of GD of component with multidirectional disassembly path,turning interference matrix（TIM） is proposed,whose structure is compact enough to describe the complete interference information from the turning point.Several methods for generating EIM and TIM rapidly and automatically are presented,including precise stepping-detection,coarse detection and accelerating detection based on bounding-box.The method for refraining static hard-interference automatically is also studied.A more comprehensive algorithm for determining GD based on EIM and TIM is then presented.An assembly planning system ＂AutoAssem＂ is developed based on UG NX platform,with the examples illustrating the effectiveness of each interference detection measures.EIM and TIM are testified to enrich the variety and variability of disassembly directions,which provide GD determination for complex production with great commonality,and provide subsequent sequence planning algorithms with effective foundation.

关 键 词：装配序列规划 干涉检测 扩展干涉矩阵 转折式干涉矩阵 几何可拆卸性 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]