A Fast Tacho-Less Order Tracking Method for Gear Fault Diagnosis Under Large Rotational Speed Variation Conditions Based on Multi-stage Generalized Demodulation

摘要：

　　The generalized demodulation based tacho-less order tracking is a promising gear fault diagnosis method due to its being applicable to large rotational speed variation condition(larger than ±30%)and its good robustness to noises.However,the current single-stage generalized demodulation based tacho-less order tacking is insufficient for precise order analysis.A multi-stage generalized demodulation based tacho-less OT method inspired by the idea of iterations is proposed against this issue in this study,where results can be improved based on the progressive iteration.Simulation and experiment case studies are carried out to validate the effectiveness of the proposed method.The results show that the multi-stage generalized demodulation based tacho-less OT method rather than the single-stage one results in a more precise order analysis in whose order spectra higher order components(meshing frequency component and its harmonics)are clearer than that in those for the single-stage generalized demodulation based tacho-less order tacking.Moreover,our method is time saving due to its only being based on simple calculations such as coarse timefrequency transform,Fourier transform and Hilbert transform so that it shall have promising prospect in applications(such as field diagnosis)which have strict computation time requirements.

关键词： Tacho-less order tracking Gear fault diagnosis Large rotational speed variation Multi-stage generalized demodulation

作者: Qi Zhou Wenjin Liu Chaoqun Wu

作者单位: School of Mechanical and Electronic Engineering,Wuhan University of Technology,No.122 Luoshi Road,Wu School of Mechanical and Electronic Engineering,Wuhan University of Technology,No.122 Luoshi Road,Wu

会议类型: 国际会议

会议名称: 2019机械设计国际会议暨第20届机械设计学术年会

会议地点: 浙江湖州

会议语种:英文

页码: 904-917

在线出版日期: 2019-08-12（万方平台首次上网日期，不代表论文的发表时间）