基于指数积公式的空间管路装配偏差传递建模及分析  

Deviations Propagation Modeling and Analysis of Spatial Pipes Assembles Based on the Product of Exponentials Formula

作　　者：杜田 赵勇[1] 宋建岭 魏强 DU Tian;ZHAO Yong;SONG Jianling;WEI Qiang(Shanghai Key Laboratory of Digital Manufacture for Thin-walled Structures,Shanghai Jiao Tong University,Shanghai 200240,China;Tianjin Changzheng Rocket Manufacturing Co.,Ltd.,Tianjin 300462,China)

机构地区：[1]上海交通大学上海市复杂薄板结构数字化制造重点实验室,上海200240 [2]天津航天长征火箭制造有限公司,天津300462

出　　处：《机械设计与研究》2020年第4期128-132,137,共6页Machine Design And Research

基　　金：国家自然科学基金资助项目(51975349);国家基础科研重大项目(JCKY2014203A001)。

摘　　要：针对火箭、飞机以及船舶等设备的管路系统,因制造与装配中偏差累积引起的系统装配效率低和可靠性下降等问题,研究空间管路装配中来源于管件成型和焊接变形的偏差形式,建立基于旋量的偏差表征,改进基于指数积公式的偏差传递模型,提出关键特征坐标误差指标(KCCE)评价偏差传递模型预测精度,实现完整的空间管路装配偏差传递建模:以三维空间管路为案例进行装配偏差传递建模与分析,结果表明:基于旋量的偏差表征方式适用于空间管路装配,改进后的空间管路装配偏差传递模型预测精度更高。In pipeline systems of many devices such as rockets,airplanes,and ships,etc.,there are difficult problems,like low assembly efficiency and reduced reliability,due to deviations accumulation of manufacturing and assembly processes.In order to solve these problems,forms of the variations from pipesforming and welding deformation in spatial pipes assembly have is studied,and also is characterized based on torsor theory,the completed deviation propagation model of spatial pipes is established by proposing animprovement variations stack-up method based on product of exponentials and also anaccuracy evaluation index for the model,called Keycharacteristic coordinate Error(KCCE).Adeviations propagation model of a three-dimensional spatial pipe assembly case is studied,the results shows that the characterized method based on torsor theory fits for pipe systems assembly,the precision of the model built via the improved modelis respectively better.

关 键 词：空间管路 装配偏差 偏差传递建模 指数积公式 旋量 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]