Abstract: To provide a feedback control device that achieves smooth continuous control at the time of switching of binary feedback controls. When, as a result of constant current feedback control being performed through a connection between a current control unit 12 and an I control unit 24, a detected measured voltage value of a control object 21 reaches a preset value that is maintained by constant voltage feedback control, a u1/u2 determination unit (switching determination unit) 27 controls changeover switches 22 and 23 to connect a voltage control unit 15 and the I control unit 24 and, in addition, connect the voltage control unit 15 to an adder 25 to which the I control unit 24 is connected, and performs switching to constant voltage feedback control.

Abstract: To provide a feedback control device that achieves smooth continuous control at the time of switching of binary feedback controls. When, as a result of constant current feedback control being performed through a connection between a current control unit 12 and an I control unit 24, a detected measured voltage value of a control object 21 reaches a preset value that is maintained by constant voltage feedback control, a u1/u2 determination unit (switching determination unit) 27 controls changeover switches 22 and 23 to connect a voltage control unit 15 and the I control unit 24 and, in addition, connect the voltage control unit 15 to an adder 25 to which the I control unit 24 is connected, and performs switching to constant voltage feedback control.

Abstract: A digital AGC control method and feedback control apparatus that enable appropriate feedback control in response to reference input values of various magnitudes are provided. The method comprises a first step in which a digital AGC unit 11 outputs a setting value in accordance with a reference input value, a second step in which a PI control unit 12 calculates an operation amount of a controlled object 16 using the setting value, a third step in which a DAC 13 generates an output signal Y representing the operation amount, a fourth step in which a gain regulator 14 and an ADC 15 calculate a measurement value M of the controlled object; and a fifth step in which the measured value M is input to the digital AGC unit 11.

Abstract: A digital AGC control method and feedback control apparatus that enable appropriate feedback control in response to reference input values of various magnitudes are provided. The method comprises a first step in which a digital AGC unit 11 outputs a setting value in accordance with a reference input value, a second step in which a PI control unit 12 calculates an operation amount of a controlled object 16 using the setting value, a third step in which a DAC 13 generates an output signal Y representing the operation amount, a fourth step in which a gain regulator 14 and an ADC 15 calculate a measurement value M of the controlled object; and a fifth step in which the measured value M is input to the digital AGC unit 11.