Abstract
Light maintenance training for electric multiple-unit components of the organization of railway operations is generally conducted using maintenance manuals and work videos, following the guidelines of each organization. These manuals are in the form of booklets, complicated and inconvenient for maintenance operators to carry. Therefore, training content that visualizes maintenance procedures in a three-dimensions (3D) space is necessary to overcome the drawbacks of booklet-type training. In this study, we developed augmented reality (AR)-based training content for railway vehicle maintenance to increase training efficiency. Providing warning signs for risky procedures reduces human error, and transparency control makes trainees check the product hierarchy. A virtual experience based on the maintenance manual is provided to improve maintenance proficiency. An axle-mounted disc brake system maintenance manual is implemented in AR to reflect the requirements of maintenance operators. The convenience of this tool is improved by loading the AR content on a mobile device. Two methods of verification were used: the system usability scale (SUS) survey and training efficiency evaluation. The resulting SUS grade was B (excellent), and the training efficiency improved by 34%.
Highlights
Regarding the reduction in human error, the total acquired score of group B was 17.8, which was 37% higher than that of group A (12.9). It seems that the training efficiency was improved by visualizing the knowledge of veteran operators as a comment/tag in augmented reality (AR) content
AR-based training content for railway vehicle maintenance was developed to overcome the drawbacks of booklet-type manuals and improve the proficiency of maintenance operators
AR technology was applied to the maintenance procedure of the axle-mounted disc brake system, which is an important component of railway vehicles
Summary
Railway vehicle maintenance plays a key role in railway asset management and contributes to operational performance. Because it is performed in a work environment that requires high adaptability and expertise, systemic training is essential [1]. Light maintenance training for electric multiple-unit components of railway-operating organizations is typically conducted using maintenance manuals and work videos, following the guidelines of each organization. A 3D visualization of the disassembling/assembling procedure before the commencement of maintenance work can improve readability compared to conventional manuals [2]. A study has shown that the 3D visualization of the maintenance procedure improves training efficiency by approximately 90% compared to the document method [3]. To overcome the drawbacks of booklet-type training and to improve proficiency in the maintenance of components, it is important to develop AR-based training content
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