The effectiveness of fault diagnosis in assembly is contingent on the effectiveness of the sensor measurement of assembled parts. Using a diagnosability enhancement methodology for a single fixture, a means to achieve an optimal sensor configuration for a multi-fixture assembly of sheet metal parts is proposed. A Hierarchical Group description of the assembly is used to build a State-Transition representation which, with fixture CAD information, is used in multi-level hierarchical optimization to arrive at the optima. A defined Coverage Effectiveness Index quantifies fault isolation performance. The index also serves to evaluate the performance effectiveness of the measurement station location and change in the sensor number. The approach has significant utility in automotive body assembly where system complexity makes the choice of sensor location vital to fault isolation performance. Examples using multi-fixture simulated and industrial automotive body assembly sequences are provided to illustrate the methodology.
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November 1998
Research Papers
Sensor Location Optimization for Fault Diagnosis in Multi-Fixture Assembly Systems
A. Khan,
A. Khan
S.M. Wu Manufacturing Research Center, The University of Michigan, Ann Arbor, Michigan 48109
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D. Ceglarek,
D. Ceglarek
S.M. Wu Manufacturing Research Center, The University of Michigan, Ann Arbor, Michigan 48109
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J. Ni
J. Ni
S.M. Wu Manufacturing Research Center, The University of Michigan, Ann Arbor, Michigan 48109
Search for other works by this author on:
A. Khan
S.M. Wu Manufacturing Research Center, The University of Michigan, Ann Arbor, Michigan 48109
D. Ceglarek
S.M. Wu Manufacturing Research Center, The University of Michigan, Ann Arbor, Michigan 48109
J. Ni
S.M. Wu Manufacturing Research Center, The University of Michigan, Ann Arbor, Michigan 48109
J. Manuf. Sci. Eng. Nov 1998, 120(4): 781-792 (12 pages)
Published Online: November 1, 1998
Article history
Received:
July 1, 1996
Revised:
July 1, 1997
Online:
January 23, 2008
Citation
Khan, A., Ceglarek, D., and Ni, J. (November 1, 1998). "Sensor Location Optimization for Fault Diagnosis in Multi-Fixture Assembly Systems." ASME. J. Manuf. Sci. Eng. November 1998; 120(4): 781–792. https://doi.org/10.1115/1.2830221
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