自动门
自动门:程序控制系统
发布时间:2014/3/20
自动门讯:
程序控制系统
    这类控制系统的参据量是按预定规律随时间变化的函数,要求被控量迅速、准确地加
以复现。机械加工使用的数字程序控制机床便是一例。程序控制系统和随动系统的参据
量都是时间函数,不同2处在于前者是已知的时间函数,后者则是未知的任意时间函数,
而恒值控制系统也可视为程序控制系统的特例。
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