一种改进的航空发动机转静件碰摩故障诊断方法

基金项目: 航空科学基金(2007ZB51025)

Improved fault diagnosis method for aero engine rotor-sator rubs

1.
School of Jet Propulsion, Beijing University of Aeronautics and Astronautics, Beijing 100083, China
2.
School of Transportation Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

摘要: 针对航空发动机碰摩故障的实际情况,分析了各种诊断方法的应用局限性,引入并改进适用于航空发动机碰摩诊断的基于SVD(奇异值分解)的碰摩特征提取方法:提出利用数据边界延拓来消除边界振荡,以此发展了适合短时间序列和长时间序列的奇异值分解处理方法,并探讨了简便实用的奇异值选择方法.并在某航空发动机故障信号的检测中,取得了良好的效果.
- 航空、航天推进系统 /
- 碰摩 /
- 奇异值分解 /
- 航空发动机 /
- 故障诊断
Abstract: In view of actual conditions of aero engine's rub-fault,the application limitations of variant diagnosis methods were analyzed.Aboundary extension method was presented for restraining the ending effect of the reconstructive signals;and an improved method was adapted to process both short time series and long time series based on singularity value decomposition and the boundary extension method.The selective method of singularity values for reconstruction was also discussed.Then the vibrating signals of certain aero engine were analyzed,showing good detection results of fault signals of a certain Aero-engine.
- aerospace propulsion system /
- rub /
- singularity value decomposition /
- aero engine /
- fault diagnosis

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