精选优质文档-倾情为你奉上An automatic controller compares the actual value of the plant output with the desired value,determines the deviation,and produces a control signal which will reduce the deviation to zero or to small value. The manner in which the automatic controller produces the control signal is called the control action.自动控制器把对象的实际输出与期望值进行比较，确定偏差，并产生一个使误差为零或微小值的控制信号。自动控制器产生控制信号的方式叫做控制作用。Here we shall present the basic control actions commonly used in industrial automatic controllers. F
