Time-varying vibration analysis based engine condition monitoring and diagnosis

被引:0
作者
Geng, Z [1 ]
Hull, JB [1 ]
Chen, J [1 ]
机构
[1] Nottingham Trent Univ, Sch Engn, Nottingham NG1 4BU, England
来源
PROCEEDINGS OF ISMA 2002: INTERNATIONAL CONFERENCE ON NOISE AND VIBRATION ENGINEERING, VOLS 1-5 | 2002年
关键词
D O I
暂无
中图分类号
O42 [声学];
学科分类号
070206 ; 082403 ;
摘要
Impact excitations, time-varying transfer routes and non-stationary response are typical characteristics of the reciprocating engine vibration. These characteristics make the engine vibration analysis more difficult than the rotating machinery. Focused on this problem, this paper details a thorough investigation from theoretical analysis to practical diagnosing approach design. Firstly, the inner-engine impacts are reasonably classified. Based on this, an analytical non-stationary vibration model is developed and discussed in details, on its time domain and time-frequency domain characteristics. Directed by these discussions, an applicable diagnosing approach is designed, which includes the software-based synchronization for non-stationary signal pretreatment, wavelet packet based filtering for impact signature extraction, as well as the Auto-Regressive model based Pseudo Wigner-Ville Distribution for integrated time-frequency signature extraction. These methodologies are successfully used in the practical diagnosis of the 6190ZLC diesel engine.
引用
收藏
页码:2011 / 2019
页数:9
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