Assembly Fixture Fault Diagnosis Using Designated Component Analysis

[+] Author and Article Information
Y. G. Liu, S. J. Hu

Department of Mechanical Engineering, The University of Michigan, Ann Arbor, MI 48109-2125

J. Manuf. Sci. Eng 127(2), 358-368 (Apr 25, 2005) (11 pages) doi:10.1115/1.1852572 History: Received February 28, 2002; Revised June 26, 2003; Online April 25, 2005
Copyright © 2005 by ASME
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Variation patterns of rigid-body motion for two groups of measurements
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The procedure of DCA of a single station sheet metal assembly process
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A fixture with 3–2–1 locating scheme and 12 measurement points
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The six possible variation patterns defined by fixture layout: P1 through P6
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An illustration of liftgate installation and measurement datum scheme
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The three designated components of rigid body motions
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The two significant deflection patterns as indicated by PCA
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Designated component values for liftgate assembly dimensions
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Four most significant eigenvectors for the liftgate assembly dimensions under functional datum
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PCA results of two orthogonal patterns with a component correlation
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A typical sheet metal joining fixture with a 3–2–1 locating scheme
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A principal component in the case of two variables




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