# Prognostics and Health Management Based on Next-Generation Technologies: A Literature Review
## 5 Application of AR to PHM  
Augmented reality technology effectively applies computer, imaging, and information technology. By adjusting the angle and position of the camera, an image is electronically processed so that the virtual object is combined with the actual situation to create a maintenance scene characterized by two-way interaction. In terms of the current practical applications of augmented reality technology, the primary way to integrate information is to create a real world and a virtual world combined with a scene so that some of the original information that is difficult for the human body to perceive is processed by the computer so it can be intuitively demonstrated, thus giving people a feeling beyond reality. The application of augmented reality technology mainly includes three-dimensional modeling, multimedia, multi-sensors, scene fusion, real-time video display, and other means, thus significantly reducing maintenance difficulty.  
[PERSON] researches the application of augmented reality technology to civil aircraft fault diagnosis and maintenance, first analyzing the technical principles and main characteristics of augmented reality technology and then elaborating on the practical application of augmented reality technology to civil aircraft fault diagnosis and maintenance according to the three aspects of maintenance object identification technology, maintenance object positioning methods, and maintenance environment construction technology [26]. [PERSON] et al. summarized the application of virtual assembly and virtual maintenance technology to aerospace. They analyzed the subsequent development trends in China's aerospace field: combining it with augmented reality technology, relying on domestic platforms, and developing in the direction of miniaturization and lightweight design [27]. [PERSON] et al. overviewed the three major supporting technologies of augmented reality, looked ahead to the potential applications of augmented reality to manned space engineering, analyzed the technical difficulties involved, and put forward corresponding solutions [28].  
The current landscape of AR technology in fault diagnosis and maintenance encompasses a broad spectrum of research and development efforts, both domestically and internationally. In human-computer interaction, AR technology offers a transformative approach to how humans interact with machines and systems. Through the seamless integration of digital overlays, AR facilitates intuitive and immersive interfaces, enabling technicians to access real-time diagnostic information and maintenance instructions hands-free. This paradigm shift in human-computer interaction can elevate the efficiency and safety of maintenance procedures, thereby mitigating the operational risks and enhancing overall productivity. In conclusion, the convergence of augmented reality (AR) technology with fault diagnosis and maintenance practices heralds a new era of innovation and efficiency. By harnessing the immersive and interactive capabilities of AR, industries stand to benefit from enhanced diagnostic precision, streamlined repair strategies, and proactive maintenance interventions. As we navigate the evolving landscape of AR applications, it is imperative to critically examine the intricate interplay between AR technology, human-computer interaction, diagnostic and repair strategies, and the integration with digital twin systems, ushering in a paradigm shift in fault diagnosis and maintenance methodologies.