Identification of concurrent control chart patterns with singular spectrum analysis and learning vector quantization

  • Authors:

  • Nong Gu;Zhiqiang Cao;Liangjun Xie;Douglas Creighton;Min Tan;Saeid Nahavandi

  • Affiliations:

  • Centre for Intelligent Systems Research, Deakin University, Waurn Ponds, Australia 3216;State Key Laboratory of Management and Control for Complex Systems, Institute of Automation, Chinese Academy of Sciences, Beijing, People's Republic of China 100190;Schlumberger Limited, Houston, USA 77073;Centre for Intelligent Systems Research, Deakin University, Waurn Ponds, Australia 3216;State Key Laboratory of Management and Control for Complex Systems, Institute of Automation, Chinese Academy of Sciences, Beijing, People's Republic of China 100190;Centre for Intelligent Systems Research, Deakin University, Waurn Ponds, Australia 3216

  • Venue:
  • Journal of Intelligent Manufacturing
  • Year:
  • 2013

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Abstract

Identification of unnatural control chart patterns (CCPs) from manufacturing process measurements is a critical task in quality control as these patterns indicate that the manufacturing process is out-of-control. Recently, there have been numerous efforts in developing pattern recognition and classification methods based on artificial neural network to automatically recognize unnatural patterns. Most of them assume that a single type of unnatural pattern exists in process data. Due to this restrictive assumption, severe performance degradations are observed in these methods when unnatural concurrent CCPs present in process data. To address this problem, this paper proposes a novel approach based on singular spectrum analysis (SSA) and learning vector quantization network to identify concurrent CCPs. The main advantage of the proposed method is that it can be applied to the identification of concurrent CCPs in univariate manufacturing processes. Moreover, there are no permutation and scaling ambiguities in the CCPs recovered by the SSA. These desirable features make the proposed algorithm an attractive alternative for the identification of concurrent CCPs. Computer simulations and a real application for aluminium smelting processes confirm the superior performance of proposed algorithm for sets of typical concurrent CCPs.