Multi-Objective Instance Weighting-Based Deep Transfer Learning Network for Intelligent Fault Diagnosis

被引:24
作者
Lee, Kihoon [1 ]
Han, Soonyoung [1 ]
Pham, Van Huan [1 ]
Cho, Seungyon [1 ]
Choi, Hae-Jin [1 ,2 ]
Lee, Jiwoong [3 ]
Noh, Inwoong [3 ]
Lee, Sang Won [3 ]
机构
[1] Chung Ang Univ, Sch Mech Engn, 84 Heukseok Ro, Seoul 06974, South Korea
[2] Chung Ang Univ, Dept Comp Sci & Engn, 84 Heukseok Ro, Seoul 06974, South Korea
[3] Sungkyunkwan Univ, Sch Mech Engn, 2066 Seobu Ro, Suwon 16419, South Korea
来源
APPLIED SCIENCES-BASEL | 2021年 / 11卷 / 05期
关键词
deep learning; fault diagnosis; industrial robot; prognostics and health management (PHM); spot welding; transfer learning; INDUCTION-MOTORS; GEARBOX;
D O I
10.3390/app11052370
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Fault diagnosis is a top-priority task for the health management of manufacturing processes. Deep learning-based methods are widely used to secure high fault diagnosis accuracy. Actually, it is difficult and expensive to collect large-scale data in industrial fields. Several prerequisite problems can be solved using transfer learning for fault diagnosis. Data from the source domain that are different but related to the target domain are used to increase the diagnosis performance of the target domain. However, a negative transfer occurs that degrades diagnosis performance due to the transfer when the discrepancy between and within domains is large. A multi-objective instance weighting-based transfer learning network is proposed to solve this problem and successfully applied to fault diagnosis. The proposed method uses a newly devised multi-objective instance weight to deal with practical situations where domain discrepancy is large. It adjusts the influence of the domain data on model training through two theoretically different indicators. Knowledge transfer is performed differentially by sorting instances similar to the target domain in terms of distribution with useful information for the target task. This domain optimization process maximizes the performance of transfer learning. A case study using an industrial robot and spot-welding testbed is conducted to verify the effectiveness of the proposed technique. The performance and applicability of transfer learning in the proposed method are observed in detail through the same case study as the actual industrial field for comparison. The diagnostic accuracy and robustness are high, even when few data are used. Thus, the proposed technique is a promising tool that can be used for successful fault diagnosis.
引用
收藏
页码:1 / 21
页数:21
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