PROPORTIONAL PLUS INTEGRAL CONTROLLER Russian patent published in 1994 - IPC

FIELD: automatic controllers. SUBSTANCE: proportional plus integral controller uses a DC amplifier, first scaling resistor, first diode, whose anode is connected to the cathode of the second diode and to the first plate of the first integrating capacitor, second scaling resistor, whose first lead is connected to the first lead of the first scaling resistor, third diode, whose cathode is connected to the anode of the fourth diode and to the first plate of the second integrating capacitor. The controller has units for discrimination of positive and negative deviations of control signal from its mean current value, unit for forming the mean current value of control signal and the third scaling resistor, the input of the unit for forming the mean current value of control signal is connected to the output of the DC amplifier, and the output - to the first inputs of the units for discrimination of positive and negative deviations of control signal from its mean value, whose second inputs are connected to the output of the DC amplifier, and the outputs - to the second plates of the second and first integrating capacitors respectively, the leads of the first and second scaling resistors are connected to the inverting input of the DC amplifier and first lead of the third scaling resistor, the anode of the second and cathode of the fourth diodes are connected to the common bus of the controller, the second lead of the first scaling resistor serves as the controller "Assignment" input, the second lead of the second scaling resistor serves as the controller "Controlled variable" input, the DC amplifier output serves as the controller output, and the second lead of the third scaling resistor is connected to the cathode of the first and anode of the third diodes. EFFECT: enhanced speed of response of controller. 2 dwg