基于LabVIEW的步进电机控制系统设计.doc

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基于LabVIEW的步进电机控制系统设计
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二零** 年三月
摘要

随着电机在工业、农业等领域的广泛应用,步进电机也越来越到多地运用到众多领域。步进电机是一种将电脉冲信号转换为角位移的机电元件,与其它类型电机相比具有易于精确控制、无累积误差等优点, 它可以在宽广的频率范围内通过改变脉冲频率来实现调速,快速起停、正反转控制等. 步进电动机必须和驱动控制器配合使用,而不能直接接到交直流电源上工作, 步进电机的控制以数字I/O接口卡作为硬件基础,采用软件程序来实现步进电机的同步精确运动控制。这种控制方法的关键是软件程序,软件程序的好坏将决定是否能实现步进电机的控制。
本设计采用PC机控制,通过PXI总线与步进电机相连,PC 上的操作界面采用LabVIEW 编写,文中简要概述虚拟仪器技术LabVIEW软件的特点,通过运用LabVIEW图形编程语言设计步进电机的简单控制系统,介绍虚拟仪器编程的一般过程和方法。这种用LabVIEW设计的系统具有控制灵活、人机交互性强、界面友好、操作方便等特点。本系统的设计为虚拟仪器的设计寻找了一种普遍的方法。
【关键词】步进电机,LabVIEW,PXI总线
ABSTRACT
The stepper motor are more and more widely used in many fields as the electrical machines widely used in industry, agriculture and other fields. The stepper motor is an electromechanical device that converts electrical pulses signal into discrete step angle. Because of the advantage of precision and non-cumulative pared with the other styles. It can regulate rate, quickly rise-stop, positive reverse controlling and brake etc by changing the wide frequency of pulse, and so on. The stepper motor must to be connected to a special equipment—stepper motor driver that it can be working properly. And it can not be connected to . A software program is adopted to realize precision motion control of stepper motor taking a digital I/O card as the hardware base of stepper motor key of this control method is the software program, which decides whether the control can be realized
This design is controlled by puter. Connect to stepper motor with PXI bus. The operating interface of PC piled with LabVIEW. The paper gives a brief overview of the features of LabVIEW in virtual instrument the use of LabVIEW graphical programming language to design a simple stepper motor controller system,the programming process and methods are system has such features as flexibility to control,well-designed puter interaction,good interface, etc. Th