The Research Of Virtual Experimental Teaching System Based On LabVIEW

This paper with graphic programming language LabVIEW as developing platform, sets up the virtual experimental teaching system. In order to improve the readability and running velocity, modular programming idea and "dynamic loading VI" program is largely adopted. First the system is divided into three and then the procedures are further thinned, debugged successfully one by one. At last the system is build-up connected with the designed framework procedures to form the final system program. The main contents of this paper are as follows:(1) Virtual test systemThe test system is set up with the production and consumption of circulating structure as basis. This section includes three main contents, signal generation, signal analysis and case study. The signal can be acquired externally by Linhua PCI-9111DAQ Card, and can also be generated by internal virtual signal generation of the system. After filtering processing, geometric analysis, frequency domain analysis and correlation analysis can be conducted to the acquired external signal; at last, the demonstration and analysis of four examples are given.(2) Virtual control systemAccording to the main knowledge structure of control theory, the content of this chapter is divided into the transfer function block diagram, the time response analysis and frequency domain characteristics analysis of the system. Through the connection of "conditions structure" and tabcontrol, the content is encapsulated and the corresponding MATLAB programs are given.(3) Virtual vibration systemThe main contents of this system include:Lissajous figure; about the forced vibration of the single freedom system under the harmonic force, studying the estimation of a single-degree-of-freedom system of natural frequency respectively through the resonance method and the power spectrum analysis.