In order to solve the problems of low efficiency and danger in the existing power maintenance training methods, a power maintenance evaluation system based on immersive virtual reality technology is developed in this paper. Based on the equipment 3D accurate model and virtual reality simulation technology, the system imports the power plant scene and equipment accurate model through MakeRea13D platform for content development. Using key technologies such as model lightweight, 3D UI display and VR multi means interaction, an immersive virtual maintenance and virtual scene operation simulation platform is established. At the same time, five led-cave, mobile virtual platform and helmet immersive simulation environment are built, and three environments can be used for rendering display. According to the field environment of the actual operation and the real structure of the equipment, the system establishes three-dimensional virtual scenes such as maintenance and operation required for the evaluation, and supplements the accurate model data required for the evaluation. The actual working environment of the power station is reconstructed according to the requirements of the evaluation content, which helps to improve the professional technicians’ sense of substitution and realism of the operation scene.

With the development of VR and big data technology, power maintenance technology evaluation in virtual environment has become a research hotspot in the current industry. In view of this, this paper designs a set of power maintenance technology evaluation system based on data interaction and immersive VR technology. On the basis of building the structure of the equipment overhaul and maintenance site, a complete evaluation system is established through the steps of model structure generation, material rendering and lighting layout. The ray interactive algorithm is used for data transmission, conversion and reception in three-dimensional scene, and finally the scientific evaluation of maintenance operation is realized. The operation results of the actual project show that the proposed method can accurately evaluate the power maintenance technology, the evaluation accuracy is as high as 95.38%, and has good engineering application value.

In order to solve the problem of stable real-time display and interaction of data in power system immersive virtual simulation applications, this article proposes a data communication protocol for power system virtual reality simulation system. Establish a data communication link between the model editing platform and the 3D virtual simulation platform, and formulate the corresponding communication protocol in a way of functionally distinguishing information types to ensure accurate and complete information exchange between the two platforms. This method can realize the data interaction and model operation between the two communication platforms.

The general structural design and the function of main modules of equipment patrol inspection system for pumped-storage power plant are introduced along with the application of the system in Huizhou Pumped-storage Power Plant.The use of the system changes the periodic manual metering mode of patrol inspectors,reduces errors and greatly decreases the fault rate of equipment.

振动信号处理是实现旋转机械振动检测与故障诊断的基础,也是振动监测软件的核心技术,对大型旋转机械运行状态监测具有重要的意义。信号的滤波和特征提取是振动信号处理的两个最重要的方面。文章总结了振动信号分析的发展及现状,并且分析了各种滤波和特征提取方法的优缺点。

Ball-beam system is a nonlinear and unstable system.The dynamic description of the ball rolling on the beam is quite complex.By modeling the mechanical part,angle and motor of the ball-beam system,the simplified transfer function of the ball-beam system is obtained.By applying optimal robust controller,optimal transient controller and two freedoms controller to the system,it is proved that the system is controllable and stable.Simulations under Simulink of the Matlab also show that the system has the same behavior.It is demonstrated that the ball-beam system is a good test device for learning control theory.