Fault Diagnosis of Engine Based on Improved Dempster-Shafer Information Fusion Method

Wei Zhou; Ying Ji Liu; Qing Fu Cao; Tian Xia Zhang

doi:10.4028/www.scientific.net/AMM.16-19.1310

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 16-19Fault Diagnosis of Engine Based on Improved...

Fault Diagnosis of Engine Based on Improved Dempster-Shafer Information Fusion Method

Abstract:

In order to enhance the accuracy of engine fault diagnosis, information fusion technology was applied and a novel combination method is proposed based on D-S evidence theory. The evidence groups were classified by evidence conflict coefficient, the importance of each highly conflict evidence was calculated, and the credibility of each evidence was determined with a distance function of evidence bodies. Then the weight value of each evidence was revised with its importance and credibility respectively. Finally, the Dempster combination rule was used to realize the information fusion. The effectiveness of the new approach proposed was verified by theoretical analysis and experiment research results. Comparing with D-S evidence theory and the improved synthesis formula, the new combination method is more efficient in improving the accuracy and the certainty degree of engine fault diagnosis.

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Periodical:

Applied Mechanics and Materials (Volumes 16-19)

Pages:

1310-1317

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.16-19.1310

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Online since:

October 2009

Authors:

Wei Zhou, Ying Ji Liu, Qing Fu Cao, Tian Xia Zhang

Keywords:

Combination Method, Engine Fault Diagnosis, Evidence Theory, Information Fusion

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