Aeroengine Oil Fault Diagnosis Based on D-S Evidential Theory

Abstract:

Aeroengine oil contains wear debris generated by friction. Based on the Dempster-Shafer evidence combination theory, aeroengine wear conditions can be effectively diagnosed. Through analysising the elements of wear debris in lubricating meduim, it can determine engines wear levels and wear parts, as references for troubleshooting. In the process of combination, an method was proposed that every element of wear quantity and wear rate were fused at first,then the integration of all elements. For Dempster-Shafer has its own limitations, two impoved methods were applied to and were compared. The results show that Dempster-Shafer evidence combination is an effective fault diagnosis method for aeroengine oil wear condition.

• Periodical: Applied Mechanics and Materials (Volume 141)
• Pages: 15-20
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.141.15
• Online since: November 2011
• Authors: Hong Chun Qu, Xie Bin Ding, Tai Yong Wang
• Keywords: Aerospace Propulsion Engineering, Aerospace Propulsion Theory, Dempster-Shafer Evidence Combination, Fault Diagnosis, Wear Debris

References

[1] Wu Zhenduo, Zuo Hongfu, Sun Youchao: Aviation Engineering and Maintenance Vol. 4 (2000), pp.25-26.

[2] Dempster A P: Annals Mathematical Statistics Vol. 38 (1967), pp.325-339.

[3] Wang Xiaoxia: Research on the Combination Rule of Conflict Evidences (North University of China, TaiYuan 2007), pp.33-46.

[4] Yager RR: IEEE Trans onsystem Vol. 41 (1989) No. 2, pp.93-137.

[5] Murphy C. K: Decision Support System (2000).

[6] Li Bicheng, Wang Bo, Wei Jun: Journal of DataAcquisition & Processing Vol. 1 (2002) No. 1, pp.33-36.

[7] Fu Jianping, Zhang Peilin, Li Guozhang: Journal of Ordnance Engineering College Vol. 17 (2005) No. 1, pp.14-16.