Gearbox Deterioration Detection under Steady State, Variable Load, and Variable Speed Conditions

被引:5
|
作者
Shao Yimin [1 ]
Chris, K. Mechefske [2 ]
Ou Jiafu [3 ]
Hu Yumei [1 ]
机构
[1] Chongqing Univ, State Key Lab Mech Transmiss, Chongqing 400044, Peoples R China
[2] Queens Univ, Dept Mech & Mat Engn, Kingston, ON K7L 3N6, Canada
[3] China Chongqing Automobile Res Inst, Chongqing 400039, Peoples R China
基金
中国国家自然科学基金;
关键词
gearbox; condition detection; hypothesis test; time-varying autoregressive(AR) modeling; Kolmogorov-Smirnov goodness-of-fit test; NONSTATIONARY VIBRATION SIGNALS; FAULT-DIAGNOSIS; WAVELET;
D O I
10.3901/CJME.2009.02.256
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
Multiple dominant gear meshing frequencies are present in the vibration signals collected from gearboxes and the conventional spiky features that represent initial gear fault conditions are usually difficult to detect. In order to solve this problem, we propose a new gearbox deterioration detection technique based on autoregressive modeling and hypothesis testing in this paper. A stationary autoregressive model was built by using a normal vibration signal from each shaft. The established autoregressive model was then applied to process fault signals from each shaft of a two-stage gearbox. What this paper investigated is a combined technique which unites a time-varying autoregressive model and a two sample Kolmogorov-Smirnov goodness-of-fit test, to detect the deterioration of gearing system with simultaneously variable shaft speed and variable load. The time-varying autoregressive model residuals representing both healthy and faulty gear conditions were compared with the original healthy time-synchronous average signals. Compared with the traditional kurtosis statistic, this technique for gearbox deterioration detection has shown significant advantages in highlighting the presence of incipient gear fault in all different speed shafts involved in the meshing motion under variable conditions.
引用
收藏
页码:256 / 264
页数:9
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