一、引言 数控(NC)技术是数字控制技术的简称,它是一种自动控制技术。采用数控技术的控制系统称为数控系统。数字控制的优点在于:1.数字控制对系统的噪声和参量变化相对不敏感。因为数据的表示、产生、传递和处理都是二进制表示的,其每一位都只有“0”或“1”两种状态;2.数据处理可以达到很高的精度和很快的速度;3.数字控制采用编程技巧,对那些重复性任务的处理极为方便;4.在模拟控制中不易实现的复杂控制规律和信号处理,利用程序(软件)可以很方便地实现;5.靠尽量减少模拟元件和对不同控制任务分别采用微处理器(或微型计算机)进行分步式控制等手段,达到很高的系统可靠性;6.利用大容量的存储器件和装置可以存储大量信息和数据,数据可长时间保存,并且不受外部环境条件的影响;7.数字控制 I. Introduction NC (NC) technology is short for digital control technology, it is an automatic control technology. The control system with CNC technology is called CNC system. The advantages of digital control lie in: 1. Digital control is relatively insensitive to changes in system noise and parameters. Because the data representation, generation, transfer and processing are binary representation, each of them have only “0” or “1” two states; 2 data processing can achieve high accuracy and fast speed; 3 . Digital control using programming skills, the handling of those repetitive tasks extremely convenient; 4. In the simulation control is not easy to achieve complex control laws and signal processing, the use of procedures (software) can be easily achieved; 5. By minimizing the simulation Components and different control tasks were used microprocessor (or microcomputer) for step-by-step control and other means to achieve high system reliability; 6. The use of large-capacity storage devices and devices can store large amounts of information and data, data Can be stored for a long time, and are not affected by the external environmental conditions; 7. Digital control