Microprocessor Based Digital PID Controller for Speed Control of D.C. Motor

M. Meenakshi
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引用次数: 15

Abstract

This paper presents a simple scheme for implementing the speed control of d.c. motor using digital PID algorithm. Intel 8085 microprocessor based hardware is developed for the implementation of the controller. The system broadly involves interfacing hardware and the software for PID algorithm. A continuous PID controller is governed by an equation which describes the dynamic time varying behavior of the input or the error signal. This is digitized using numerical approximations and is programmed in the microcomputer. This system is a closed loop control system with feedback signal generated by a digital magnetic pickup, which gives a pulse output which is TTL compatible. A digital to analog converter interfaces the power control to the microcomputer. The PID algorithm along with the hardware achieves the speed control of the d.c. motor. The hardware and software are validated in real time by considering different speed settings.
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基于微处理器的直流电机速度控制数字PID控制器
本文提出了一种利用数字PID算法实现直流电机转速控制的简单方案。开发了基于Intel 8085微处理器的硬件实现控制器。该系统主要涉及PID算法的硬件接口和软件接口。连续PID控制器由一个方程控制,该方程描述输入或误差信号的动态时变行为。使用数值近似将其数字化,并在微机中编程。该系统是一个闭环控制系统,由一个数字磁拾取器产生反馈信号,给出一个TTL兼容的脉冲输出。一个数模转换器将电源控制与微型计算机连接起来。PID算法配合硬件实现直流电机的转速控制。通过考虑不同的速度设置,对硬件和软件进行实时验证。
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