一、比例控制一般,采用所谓P控制方式,其执行机构的动作是与给定值和控制对象的测量值之偏差成比例的。图1示出比例控制(电平衡继电器),图2示出比例控制(电子平衡继电器),图3示出气动式,图4示出电-气动式的比例控制的原理图。在图1α用电平衡继电器的控制器中,控制器的电位器与控制用电机的反馈电位器构成电桥。 First, the proportion of control in general, the use of the so-called P control mode, the action of its implementing agencies and the given object and the control object is proportional to the deviation of the measured value. FIG. 1 shows a proportional control (balance relay), FIG. 2 shows a proportional control (electronic balance relay), FIG. 3 shows a pneumatic type, and FIG. 4 shows a schematic diagram of an electro-pneumatic proportional control. In the controller of Figure 1α, the potentiometer of the controller and the feedback potentiometer of the controlling motor form a bridge.