Model Parameter Transfer for Gear Fault Diagnosis under Varying Working Conditions  

作　　者：Chao Chen Fei Shen Jiawen Xu Ruqiang Yan 

机构地区：[1]School of Instrument Science and Engineering,Southeast University,Nanjing 210096,China [2]School of Mechanical Engineering,Xi'an Jiaotong University,Xi'an 710049,China

出　　处：《Chinese Journal of Mechanical Engineering》2021年第1期168-180,共13页中国机械工程学报（英文版）

基　　金：Supported by National Natural Science Foundation of China(Grant No.51835009).

摘　　要：Gear fault diagnosis technologies have received rapid development and been effectively implemented in many engineering applications.However,the various working conditions would degrade the diagnostic performance and make gear fault diagnosis(GFD)more and more challenging.In this paper,a novel model parameter transfer(NMPT)is proposed to boost the performance of GFD under varying working conditions.Based on the previous transfer strategy that controls empirical risk of source domain,this method further integrates the superiorities of multi-task learning with the idea of transfer learning(TL)to acquire transferable knowledge by minimizing the discrepancies of separating hyperplanes between one specific working condition(target domain)and another(source domain),and then transferring both commonality and specialty parameters over tasks to make use of source domain samples to assist target GFD task when sufficient labeled samples from target domain are unavailable.For NMPT implementation,insufficient target domain features and abundant source domain features with supervised information are fed into NMPT model to train a robust classifier for target GFD task.Related experiments prove that NMPT is expected to be a valuable technology to boost practical GFD performance under various working conditions.The proposed methods provides a transfer learning-based framework to handle the problem of insufficient training samples in target task caused by variable operation conditions.

关 键 词：Gear fault diagnosis Model parameter transfer Varying working conditions Least square support vector machine 

分 类 号：TH132.41[机械工程—机械制造及自动化]