简易自动控制原理实验系统设计

The Design of Simple Experiment System for Automatic Control Theory

针对传统高校实验室自动控制原理实验平台价格昂贵和操作复杂的缺点,设计一种价格便宜和操作方便的简易实验系统。该系统分为硬件和软件两部分,硬件部分采用模块化设计思想,主要包括电源模块、信号发生器模块、基本实验环节模块、控制系统模块和数据采集模块;其中控制系统采用双单片机系统AT89S52和ATmega16作为控制器,方便数据采集、处理和显示。系统软件部分采用LabVIEW开发平台,制作的虚拟示波器具有良好的人机交互功能,以及能对实验波形进行监测和后续处理。整个系统设计完成后,通过典型二阶振荡环节单位阶跃响应进行验证,实验结果与理论分析完全一致,证明该系统能代替传统的自动控制实验平台,具有价格便宜和操作方便的优点,在高校具有极高的推广价值。

For the shortcomings high prices and operation complexity of traditional university laboratory experiment platform for automatic control principle, the paper designs a simple experimental system of cheap and easy to operate. The sys!em is divided into two parts of hardware and software. The hardware part adopts modular design concept, mainly including power module, signal generator module, basic experimental link module, control system module and the data acquisition module. The module of control system uses dual microcontroller of AT89S52 ATmegal6 and as a controller, and facilitates data collection, processing and display. The software part adopts the development platform of LabVIEW to produce a virtual oscilloscope, and the virtual oscilloscope has a good interactive feature, as well as to monitor the experimental waveforms and subsequent processing. After the completion of the entire system design, the system is carried out an experiment through the step response for typical second - order oscillation link, and the experimental result is consistent entirely with the theoretical analysis. The experiment result has proved the simple experiment system can replace the traditional experimental platform for automatic control principle, and the system has the advantages of cheap and easy to operate, also has high promotional value in colleges and universities.