LabVIEW嵌入Matlab脚本节点的电机转速控制系统仿真

Simulation of motor speed control system based on LabVIEW embedded in Matlab Script node

LabVIEW是一款使用图形编程语言的开发平台,用LabVIEW编写出的仿真程序具有友好的人机界面.以直流电机转速控制系统为被控对象,基于LabVIEW软件平台,嵌入Matlab脚本节点,并用Matlab控制工具箱中的函数来实现PID控制器的设计,并进行仿真计算.另外,将系统的传递函数转换成状态方程,运用龙格库塔法求出方程的数值解.最后,针对具体的直流电机控制系统模型,进行了实例分析,从所设计的界面来看,PID各参数对系统性能的影响一目了然,而且计算过程简洁方便.

LabVIEW is a development platform using graphical programming language, and the simulation program based on the tool of LabVIEW has friendly interface. Speed control system for direct current(DC)motor was designed in this paper. Based on LabVIEW software platform, Matlab script node was embedded in. The functions of control toolbox in Matlab were used for constructing proportional integration derivative(PID) controller, and the simulation calculation was accomplished. Additionally the transfer function of system could be converted to state equations, and the numerical solution of the equation with Runge-Kutta method was obtained. At last, according to the definite model of DC motor speed adjusting system, the effectiveness of the control algorithm was analyzed. The effect of PID parameters on system performance is even more intuitive, and the calculating process is convenient and simple.