Mesh stiffness calculation of defective gear system under lubrication with automated assessment of surface defects using convolutional neural networks

• Published in: Mechanical systems and signal processing Vol. 216; p. 111445
• Main Authors: Wang, Siyu, Duan, Penghao
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.07.2024
• Subjects: Deep learning; Defect detection; Gear lubrication; Machine vision inspection; Mesh stiffness; Deep learning; Machine vision inspection; Mesh stiffness; Gear lubrication; Defect detection
• ISSN: 0888-3270; 1096-1216
• DOI: 10.1016/j.ymssp.2024.111445

[Display omitted] •A machine-vision-inspection method is proposed to detect the gear surface defects.•The EHL model of defective gear is established, considering roughness and defects.•The tribological behavior is investigated for defective spur gear contact.•The mesh stiffness calculation model is proposed for spur gear with surface defects. As typical failure mode of gear system, the tooth surface pitting, spalling can be detected in most long-running gear system, especially under heavy-load and high-speed condition, or under lubricant-starvation condition, the tooth pitting is characterized by irregular contour and random distribution. Most previous study on the defective gear system mainly based on manually detection of defective region, or just rely on geometric simplification of defects, leading to inaccurate results with low-efficient method, therefore, the machine-vision-based defect inspection method is proposed in the study of defective gear system. First, the pitting defects on gear tooth surface is detected and segmented based on involutional neural network U-net, then the tooth surface with segmented defective region is mapped to the elastohydrodynamic lubrication model of spur gear system, finally, the tribological behavior in addition to the mesh stiffness under lubrication condition of defective spur gear system are investigated and discussed. The results reveal that the machine-vision-based defects inspection could improve the accuracy and efficiency of the failure study for gear system.