Fixture Variation Diagnosis of Compliant Assembly Using Sensitivity Matrix

• Published in: Shanghai jiao tong da xue xue bao Vol. 14; no. 6; pp. 707 - 712
• Main Author: 于奎刚 金隼 来新民
• Format: Journal Article
• Language: English
• Published: Heidelberg Shanghai Jiaotong University Press 01.12.2009
• Subjects: Architecture; Computer Science; Electrical Engineering; Engineering; Life Sciences; Materials Science; 成分分析仪; 汽车车身; 灵敏度矩阵; 装配模型; 诊断方法; 零件制造; compliant assembly; multi fixture variation diagnosis; root cause identification; sensitivity analysis; TH 162
• ISSN: 1007-1172; 1995-8188
• DOI: 10.1007/s12204-009-0707-x

An automotive body is composed of compliant sheet metal parts. Fast and exactly diagnosing variation sources is very important when assembly variations happen. This paper proposes a diagnosis method of multi fixture variations based on the variation model of compliant sheet metal assembly. The assembly variation model is obtained by using the method of influence coefficients （MIC） and considering the manufacturing variations of compliant parts and multi fixture variations. The measurement point variations induced by part manufacturing variations are firstly removed from the measurement data. The variation patterns of multi fixture variations are constructed by column vectors of fixture variation sensitivity matrix. This method is proved to be feasible for exactly diagnosing the fixture variations and has higher diagnosis efficiency than designated component analysis （DCA）.