基于多维矢量环的装配偏差源敏感度分析  

Sensitivity Analysis of Assembly Deviation Source Based on Multidimensional Vector Loop

作　　者：唐健钧[1] 田锡天[2] 耿俊浩[2] 刘海涛[1] 张世炯 

机构地区：[1]中航工业成都飞机工业(集团)有限责任公司,成都610092 [2]西北工业大学CAPP与制造工程软件研究所,西安710072

出　　处：《机械工程学报》2015年第17期156-161,共6页Journal of Mechanical Engineering

基　　金：西北工业大学博士论文创新基金资助项目(CX201313)

摘　　要：为了准确有效地实现偏差累积分析和装配精度预测,提出一种基于多维矢量环的装配偏差源敏感度分析方法。根据装配生产实际,将偏差源分为加工尺寸偏差、加工形状和位置偏差以及装配位置偏差三类;进一步将偏差源敏感度表示为装配尺寸微小变化的变化量与偏差源尺寸微小变化的变化量的比值。将装配连接形式抽象为面-面连接、面-弧连接、面-角连接、转动连接、弧-弧连接和固定连接,并分析每类连接形式的相对自由度。依据装配工艺确定的装配约束关系、装配顺序和定位方式,定位零件之间的连接点,建立零件的基准参考结构,并以此为基础建立偏差传递路径;依据偏差传递路径创建装配体多维矢量环,建立各维度的标量方程;利用一阶泰勒展开和矩阵变换方法,求解出敏感度表达式。以机翼内襟翼摇臂装配体偏差源敏感度分析为例,验证了该偏差源敏感度分析方法的有效性。For deviation accumulation analysis and mechanical precision predicting effectively and accurately, a sensitivity analysis of assembly deviation source based on multidimensional vector loop is proposed. According to the actual production, deviation source is divided into three types： Dimension deviation, geometric and position deviation, and assembly location deviation. Deviation source sensitivity is defined as the ratio of assembly size variation and deviation source size variation. Assembly joint types are abstracted to six kinds： Planar, cylinder slider, edge slider, revolute, parallel cylinders and rigid. According to assembly constraint relations, assembly sequence and way of positioning, deviation transfer path is established by positioning the join between parts, and establishing part＇s datum reference frame. Assembly multidimensional vector loop is created by the deviation transfer path, and scalar equations of each dimension are established. Using the first order Taylor expansion and matrix transformation method, assembly deviation source sensitivity is solved. Taking assembly precision optimization of wing flap rocker as a research example, test the effectiveness and efficiency of the deviation source sensitivity analysis method.

关 键 词：偏差源 敏感度 装配 矢量环 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]