Deep learning-based fault diagnosis of servo motor bearing using the attention-guided feature aggregation network

• Published in: Expert systems with applications 2024-12, Vol.258, p.125137, Article 125137
• Main Authors: Raouf, Izaz, Kumar, Prashant, Soo Kim, Heung
• Format: Article
• Language: English
• Subjects: Fault detection; Industrial robots; Model generalization; Prognostics and health management; Smart factory
• ISSN: 0957-4174
• DOI: 10.1016/j.eswa.2024.125137

This paper introduces a novel approach to fault detection in the servo motor bearings of industrial robots within the context of Industry 4.0 prognostics and health management. The proposed solution leverages the innovative feature aggregation network for robotic fault detection in the application of smart factory. Overcoming challenges associated with traditional techniques that include handcrafted features, transfer learning, and deep learning models, the proposed approach offers a hierarchical information aggregation mechanism. The model is customized through hyperparameter tuning, resulting in a streamlined architecture with significantly fewer parameters. This parameter efficiency is notably distinct when compared to off-the-shelf transfer learning models that commonly feature extensive parameter counts in the range of hundreds of thousands or millions. The proposed model subjected to rigorous validation across diverse experimental scenarios that affirm its adaptability and robust performance. The model showcases accuracy in fault detection under both simple and welding motion scenarios, while its generalization capabilities are demonstrated as it successfully predicts health states in welding motion, showcasing versatility and reliability across various operational scenarios.