LabVIEW一阶系统虚拟教学实验系统开发

Development of LabVIEW First-order System Virtual Teaching Experiment System

介绍了LabVIEW的特点以及其发展现状,同时利用LabVIEW2017版本和控制设计和仿真模块进行虚拟教学实验系统的设计。该虚拟教学实验系统可以对一阶系统的相关参数进行更改来对其频率特性和时间响应时域图进行仿真。通过更改PID控制的3个系数可以设计出不同的PID控制系统,并让之前的响应信号通过该PID控制系统得出最终的时间响应时域图。最终,设计出的系统可以体现出一阶系统的相关特性和时间响应特性,同时也分析讨论了PID控制中比例系数、积分系数、微分系数分别对整个控制系统的影响。通过虚拟仪器技术开发出来的虚拟教学实验系统可以替代一些传统实验,尤其对于一些理工科的大学更为重要,可以缓解传统教学实验环节的不足和实验资源不平衡等问题。

The characteristics of LabVIEW and its development status were introduced,and the LabVIEW2017 version and the control design and simulation module were used to design a virtual teaching experiment system.The virtual teaching experiment system can change the relevant parameters of the first-order system to simulate its frequency characteristics and time response time domain diagram.Different PID control systems could be designed by changing the three coefficients of PID control,and let the previous response signal pass through the PID control system to obtain the final time response time domain diagram.Finally,the designed system could reflect the relevant characteristics and time response characteristics of the first-order system.At the same time,the influence of proportional coefficient,integral coefficient and differential coefficient in PID control on the entire control system was also analyzed and discussed.The virtual teaching experiment system developed by virtual instrument technology can replace some traditional experiments,especially for some science and engineering universities,it is more important,and can alleviate the problems of traditional teaching experiment links and imbalance of experimental resources.