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Abstract-The development of web-based online laboratory for engineering education has made big progress in recent years with state-of-the-art technologies. In order to further promote the effectiveness within an online virtual environment, the virtual reality (VR) interactive feature of WebVR Control laboratory based on HTML5 is presented in this paper. The educational objective is to assist the students or researchers to conduct a realistic and immersive experiment of control engineering with a head-mounted display (HMD) equipped. The implementation of the VR technique mainly relies on the Three.js graphic engine based on Web Graphics Library (WebGL) which has been supported by most of the mainstream web browsers in their latest version without a plugin embedded. At the end of the paper, the ball and beam system is taken as an example to illustrate the whole operational approach of the VR experiment in detail. While such a VR interactive feature hasn't been integrated into some of the current web-based online laboratories, the technical solution could be inspirational for them.

Online experimental systems that include remote and virtual experiments based on the Internet has become a new form of experiment in engineering education. This paper proposes a virtual experiment for the complex process control system. It is based on the networked control system laboratory (NCSLab), which provides a reliable framework for virtual thermal experiment. Taking the combustion system of 1000 MW ultra-supercritical coal-fired once-through boiler-turbine units as an example, the framework and the implementation process of the online system are given in this paper. A new presentation form for complex processes control experiment is provided, which could be a solution for simulating physical experimental equipment in virtual environments. The potential danger in practical experiments could be avoided. Additionally, the real-time operation for complex control systems could be presented in a 3D scene. Meanwhile, the flexibility and efficiency could be increased in engineering experimental education. Moreover, using the experiment evaluation method, the references and feedback for teaching and assessment are provided in this paper.

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Electric power information has garnered particular interest in conventional electrical power systems because it plays a crucial role in the electric power industry. Additionally, electric power communication networks ensure the overall power system's reliability and safety. The concepts and techniques used in digital twin (DT)‐based online tools for electric power communication networks are introduced in this paper. Moreover, online DT tools are proposed as daily learning and training resources for both new staff and communication commissioners, which can be used for the internet and the company intranets. Users can control DT and physical equipment simultaneously, and device status can be seen in real time. The design, modelling, control principles, data collection, and visual display of the DT tools are all covered in this study. To validate the applicability of the proposed framework, a case study for optical fibre damage and the recovery process in a typical communication interruption malfunction is investigated. The research presented in this paper has the potential to provide useful tools and new paradigms for designing online DT training and education systems.