Fixture Failure Diagnosis for Sheet Metal Assembly with Consideration of Measurement Noise

[+] Author and Article Information
D. Ceglarek

Department of Mechanical Engineering and Applied Mechanics, The University of Michigan, Ann Arbor, MI 48109

J. Shi

Department of Industrial and Operations Engineering, The University of Michigan, Ann Arbor, MI 48109

J. Manuf. Sci. Eng 121(4), 771-777 (Nov 01, 1999) (7 pages) doi:10.1115/1.2833142 History: Received December 01, 1997; Revised April 01, 1999; Online January 17, 2008


This paper expands previously developed assembly fixture fault diagnosis methodology (Ceglarek and Shi, 1996) by considering the impact of measurement noise on the diagnostic results. The proposed solution provides a new analytical tool to address the diagnosability issue during the assembly process design stage. An evaluation of fault diagnosis index as a function of noise, fixture geometry, and sensor location is presented. The index is derived from the general class of covariance matrices describing tooling faults. Simulation based on the real fixture is presented to illustrate the proposed method.

Copyright © 1999 by The American Society of Mechanical Engineers
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