§5 接口装置5.1 概述如在第一章中所指出的,为了实现实时控制的目的,微型计算机应具备以下三种功能:1.数据采集和输出的功能:所谓数据采集是将被控制量(及给定量)输入到计算机来。而输出功能是将经控制算法计算得出的控制信号送到被控制对象,或送到执行机构(例如伺服电动机,电液伺服阀等)以完成控制功能。2.实时时钟控制功能:控制实时时钟以定时的发出信号,使计算机以确定的采样周期来完成数据采集——控制算法——控制量输出这一周而复始的过程。 §5 interface device 5.1 Overview As pointed out in Chapter I, in order to achieve real-time control purposes, the microcomputer should have the following three functions: 1. Data acquisition and output functions: the so-called data acquisition is controlled by the amount of And the given amount) to the computer. The output function is the control algorithm calculated by the control signal sent to the controlled object, or sent to the implementing agencies (such as servo motors, electro-hydraulic servo valve, etc.) to complete the control function. 2. Real-time clock control: real-time clock control to send a signal to the timing, the computer to determine the sampling period to complete the data acquisition - control algorithm - control output of this cycle process.