【作者】 马蔷； 王金城； 孟华；

【Author】 Ma Qiang Wang Jincheng Meng Hua(Dalian University of Technology Dalian 116023 China)

【机构】 大连理工大学电信学院；

【摘要】 频域分析法是应用频率特性研究线性系统的一种图解方法,是研究控制系统的重要工程方法。对于一个稳定的线性系统,可用实验的方法求出频率特性。应用虚拟仪器技术,采用软件就是仪器的思想,在LabVIEW8.2环境下开发了线性控制系统频率响应分析实验平台。实验平台具有低频信号发生器及两路的实时数据采集功能,能够实现线性系统的频率响应分析,求出在不同频率正弦信号作用下线性系统的输出幅值及与输入信号的相位差,绘制出Bode图并进行幅值与相位裕量分析。是较好的自动控制原理实验教学工具。更多还原

【Abstract】 As a kind of graphic technique,frequency domain performance analysis is used to study linear control system by means of frequency characteristic and is an important engineering method for control system research. For steady linear systems,frequency characteristic can be obtained by experiment.Using virtual instrument technique,essentially software as instrument,a linear control system frequency response analysis experiment platform is developed under LabVIEW8.2 environment.The experiment platform has low frequency signal generator as well as two-entry real time data collecting functions,can realize the linear system frequency response real time analysis,solves the output signal amplitude and output/input signal phase difference of liner systems affected by sinusoidal signal input of different frequencies,draws the Bode Diagram,and analyses gain and phase margins.Therefore,this platform is a better teaching tool for automatic control principle experiment.更多还原