Research of Semi-physical Simulation Platform of the AC Drive System

Along with computer communication technology and the rapid development of embedded control technology, modern train control has been transformed into a network-based distributed architecture of the control system from the concentrated form of direct digital control system. Train Communication Network (TCN) composes of the Multifunction Vehicle Bus (MVB) and Wire Train Bus (WTB), which Multifunction Vehicle Bus (MVB) based on distributed control is recommended to Multifunction Vehicle Bus (MVB), which has high reliability, real-time performance, meets the modern trend of development and reliability requirements of the train vehicles.Train control network, which includes train running status monitoring, run process control, failure diagnostics and passenger information services, with the vehicle-mounted microcomputer processor, network technology to achieve information transmission between the various systems in the train, and ultimately the entire train control, management and monitoring of various types of vehicle equipment, embodying the train system, information, intelligence and networking, is a key part of the modern train technology. In the process of research in this field, the traditional test and demonstrate methods need the train in kind or use a large number of instruments and equipments to set up the experimental platform. These methods being short of testing capabilities and complicated to operate, in which access to information is vulnerable to the impact and limitations, not only spend a lot of manpower, financial and material resources, and the results are not intuitive.In this issue, first, our school AC drive system experimental platform is discussed, Multifunction Vehicle Bus (MVB) network data capture and analysis is solved, mastering TCN train control network standards, with the research and development of the MVB/USB Gateway, the virtual scene establishment of the train operation environment, production of train three-dimensional model and generation of virtual dynamic effects are completed in the application of three-dimensional image technology, virtual reality technology and virtual instrument technology. Moreover, full account of network debugging process and human-computer interaction real-time requirements, adopting "producer-consumer model" to complete the related data acquisition and processing, the interactive software for the PC with the host computer is developed. Finally, a set of semi-physical train network real-time control visualization system based on our school AC drive system is designed and completed, which responds in real-time to all kinds of status information and control instructions from the train network in the form of a virtual dynamic effects, demonstrates vividly the transmission of control commands, the corresponding action of the controlled object and the vehicle in the network system as the medium of a variety of operating conditions.