Optimal sensor distribution in multi-station assembly processes for maximal variance detection capability

Yuan Ren and Yu Ding

IISE Transactions, 2009, vol. 41, issue 9, 804-818

Abstract: Recent advances in sensor technology now allow manufacturers to distribute multiple sensors in multi-station assembly processes. A distributed sensor system enables the continual monitoring of manufactured products and greatly facilitates the determination of the underlying process variation sources that cause product quality defects. This paper addresses the problem of optimally distributing sensors in a multi-station assembly process to achieve a maximal variance detection capability. A sensitivity index is proposed for characterizing the detection ability of process variance components and the optimization problem for sensor distribution is formulated for a multi-station assembly process. A data-mining-guided evolutionary method is devised to solve this non-linear optimization problem. The data-mining-guided method demonstrates a considerable improvement compared to the existing alternatives. Guidance on practical issues such as the interpretation of the rules generated by the data mining method and how many sensors are required are also provided.

Date: 2009
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DOI: 10.1080/07408170902789050

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