Decomposition of the symptom observation matrix and grey forecasting in vibration condition monitoring of machines

• Autorzy: Czesław Cempel
• Języki publikacji: EN

Abstrakty

EN

With the tools of modern metrology we can measure almost all variables in the phenomenon field of a working machine, and many of the measured quantities can be symptoms of machine conditions. On this basis, we can form a symptom observation matrix (SOM) intended for condition monitoring and wear trend (fault) identification. On the other hand, we know that contemporary complex machines may have many modes of failure, called faults. The paper presents a method of the extraction of the information about faults from the symptom observation matrix by means of singular value decomposition (SVD), in the form of generalized fault symptoms. As the readings of the symptoms can be unstable, the moving average of the SOM is applied with success. An attempt to assess the diagnostic contribution of a primary symptom is made, and also an approach to assess the symptom limit value and to connect the SVD methodology with neural nets is considered. Finally, a condition forecasting problem is discussed and an application of grey system theory (GST) to symptom prognosis is presented. These possibilities are illustrated by processing data taken directly from the machine vibration condition monitoring area.

Słowa kluczowe

EN

machine wear; multidimensional observation; vibration; SVD decomposition; fault space; observation space; symptom limit value; forecasting; grey system theory

• Wydawca: University of Zielona Gora Press
• Czasopismo: International Journal of Applied Mathematics and Computer Science
• Rocznik: 2008
• Tom: 18
• Numer: 4
• Strony: 569-579

Daty

wydano

2008

otrzymano

2007-10-04

poprawiono

2008-04-11

Twórcy

autor

Czesław Cempel

• Institute of Applied Mechanics, Poznań University of Technology, ul. Piotrowo 3, 60-965 Poznań, Poland

Bibliografia

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Identyfikatory

DOI

10.2478/v10006-008-0050-7