| Many courses are based on the experiment in science and engineering teaching, so the experimental condition reflects a school level and research level. It's critical for students to cultivate comprehensive quality and practical skills under a good experimental teaching condition. The traditional experimental teaching in our country has been restricted by geographical, time, teaching methods, teaching contents and the quality or quantity of teaching apparatus. As to keep up with the rapid development of education, it's imperative to construct a set of open, operability, decentralized,networked,intelligent experimental system. Using the virtual instrument technology, the remote control of the inverted pendulum experiment and motor system is studied based on the teaching suite of ELVIS II experimental platform in this article.Characteristics and advantage of virtual instrument technology have been analyzed first to support the subject. The remote control system has been modular designed based on the ELVIS II platform and determine the structure of the remote control and network mode based on analysis of requirements of the remote control virtual instrument experiment system. The B/S (browser/server) network mode has been build, which focused on the server side program development. It does not need the client program development and maintenance, so it can reduce the pressure of the client, and cost savings.In this paper the motor and the inverted pendulum control experiments have been mainly studied, and analyze the principle of control experiment. Then experimental modules respectively have been studied for the mathematical modeling, model analysis, the controller design, model simulation and actual control experiment design. For motor module,PI controller is designed to realize the motor high precision speed control, but there is the disadvantage of slow response. Then fuzzy PI controller is developed to achieve the fast,small overshoot, high precision control effect. PV controller is designed to realize the motor position control and find optimal controller parameters by the simulation of the motor model.For inverted pendulum experiment module, through the movement of institutions, the stress and structure analysis to establish the corresponding mathematical model. According to the model analysis, system is not stable, but control and view, and then the linear quadratic optimal controller is designed to realize the balance control of inverted pendulum, and the module of the simulation to get the optimal controller parameters.Finally, the remote control system is designed based on virtual instrument, including environment configuration, network communications, login system, as well as the remote control method of motor and inverted pendulum model. The preliminary experimental results show that the experimental system can realize the function of remote control, and has a large range of Shared expandability and reliable data transmission etc. As a result, it can meet the requirements of remote control experiment. |
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