論文 - 奥村　進

Failure Diagnosis by Improved Mahalanobis-Taguchi System 査読

Susumu Okumura and Nobuyuki Take

Proceedings of the 23rd International Conference on Condition Monitoring and Diagnostic Engineering Management   591 - 598   2010年4月

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記述言語：英語   掲載種別：研究論文（学術雑誌）   参加形態：共同（主担当）  

The Mahalanobis-Taguchi system (MTS) based on quality engineering is one of the techniques of failure diagnosis using multivariate data and attracts increasing attention in recent years. The MTS does not fully consider the statistical property of a Mahalanobis distance measure, which affects discrimination rate for the analyzed data. In this study, a new method, in which the statistical property of the Mahalanobis distance is incorporated and normal and abnormal space can be separated efficiently, is proposed. Diagnosis examples for clothing data show that the proposed method performs better than the conventional technique.

Optimal Physical Life Distribution of a Reusable Unit Based on a Mathematical Model of Environmental Impact 査読

Susumu Okumura and Satoshi Miyashita

Proceedings of the 16th CIRP International Conference on Life Cycle Engineering   330 - 336   2009年4月

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記述言語：英語   掲載種別：研究論文（学術雑誌）   参加形態：共同（主担当）  

Reuse of products or product parts is effective to reduce environmental impact. In the design phase of sustainable products involving reusable units, it is important to set an appropriate physical life span for a reusable unit. A reusable unit should be durable for a period equal to at least two functional lives through product circulation with consideration of functional degradation of products and reusable units, and their demand. If a reusable unit has a short functional life or little demand, its having an excessive physical life span will increase environmental impact. In this study, a mathematical model of environmental impact of a reusable unit is developed in a discrete form. Then, optimal physical life distributions are derived based on numerical examples.

Mahalanobis-Taguchi System Improving Separation Performance of Normal and Abnormal Space 査読

Susumu Okumura, Yasushi Ohtsuka and Nobuyuki Take

Proceedings of the 22nd International Conference on Condition Monitoring and Diagnostic Engineering Management   263 - 270   2009年4月

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記述言語：英語   掲載種別：研究論文（学術雑誌）  

The Mahalanobis-Taguchi system (MTS) based on quality engineering is one of the techniques of failure diagnosis using multivariate data and attracts increasing attention in recent years. The MTS does not fully consider the statistical property of a Mahalanobis distance measure, which affects discrimination rate for the analyzed data. In this study, a new method, in which the statistical property of the Mahalanobis distance is incorporated and normal and abnormal space can be separated efficiently, is proposed. Diagnosis examples for clothing data show that the proposed method performs better than the conventional technique.


A Variational Approach to Inspection Programs of Equipment Subject to Random Failure 査読

Susumu Okumura

Advances in Life Cycle Engineering for Sustainable Manufacturing Businesses: Proceedings of the 14th CIRP Conference on Life Cycle Engineering   － ( － )   317 - 322   2007年4月

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Springer  

Determination of Inspection Schedules of Equipment by Variational Method 査読

Susumu Okumura

Mathematical Problems in Engineering   2006 ( Article ID 95843 )   16 - 16   2006年4月

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Hindawi Publishing  

Error Prevention in Robotic Assembly Tasks by Machine Vision and Statistical Pattern Recognition Method 査読

Susumu Okumura, Nobuyuki Take and Norio Okino

International Journal of Production Research   43 ( 7 )   1397 - 1410   2005年4月

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Taylor and Francis   参加形態：共同（主担当）  

Physical Life Design of Reusable Unit with Consideration of Time Series Behavior of Its Value and Demand

Susumu Okumura and Yutaka Sakabe

Proceedings of EcoDesign2005: Fourth International Symposium on Environmentally Conscious Design and Inverse Manufacturing   － ( － )   4 - 4   2005年4月

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：IEEE Computer Society   参加形態：共同（主担当）  

Inspection Schedules For Discontinuously Deteriorating Equipment by Variational Method 査読

Susumu Okumura

Proceedings of the 18th International Conference on Condition Monitoring and Diagnostic Engineering Management   － ( － )   611 - 620   2005年4月

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記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：COMADEM International