变胞机构结构变换的位移子群描述方法  

Description of Displacement Subgroup for Structure Transformations of Metamorphic Mechanisms

作　　者：张忠海[1] 李端玲[1] 

机构地区：[1]北京邮电大学自动化学院,北京100876

出　　处：《北京邮电大学学报》2013年第3期44-48,59,共6页Journal of Beijing University of Posts and Telecommunications

基　　金：国家自然科学基金项目(51075039);中央高校基本科研业务费项目(2012LD03);清华大学摩擦学国家重点实验室开放基金项目;新世纪优秀人才支持计划项目(NCET-12-0796);高等学校博士学科点专项科研基金课题(20120005110008)

摘　　要：为了对变胞机构的构态进行分析,提出了变胞机构结构变换的位移子群描述方法.给出了相邻和非相邻构件合并变胞的位移子群表示和计算方法以及变胞变换的位移子群矩阵表示和计算方法.提出了1个8-SSSS空间并联变胞机构,并将该并联变胞机构的结构变换过程采用位移子群和位移子群矩阵方法进行表示和计算,进一步验证了所提方法的正确性和有效性.新方法不但使变胞变换问题转换为位移子群的表示和计算问题,而且使变胞机构结构变换描述方法由拓扑结构拓展到了几何结构.In order to analyze configurations of metamorphic mechanisms,a description method of displacement subgroup for structure transformations of metamorphic mechanisms is proposed.Methods of representation and calculation of displacement subgroup for adjacent and non-adjacent link combinations are presented.And methods of representation and calculation of displacement subgroup matrix for metamorphic transformations are also presented.A spatial 8-SSSS parallel metamorphic mechanism is proposed as well.Its structure transformation is represented and calculated by methods of displacement subgroup and its matrix.The effectiveness and correctness of the proposed method are further proved.The method can transform issues of metamorphic transformations into the representation and calculation of displacement subgroup.Furthermore,the applicability of the description method for structure transformations of metamorphic mechanisms is extended from topological structure to geometric structure.

关 键 词：变胞机构 位移子群 位移子群矩阵 结构变换 构件合并 

分 类 号：TH112[机械工程—机械设计及理论]