ELECTROHYDRAULIC ACTUATOR Russian patent published in 2001 - IPC

FIELD: applicable in highly reliable automatic flight control systems of flight vehicles. SUBSTANCE: the actuator uses the second integrator, series- connected third limitation unit, second comparison unit, second low-pass filter and the second threshold device, correction channel containing series-connected third integrator, first relay element, third low-pass filter, second relay element and the fourth limitation unit, whose output is connected to the third input of the amplifier-adder, feedback to the flow of the control winding of the electrohydraulic amplifier is connected to the fourth input of the amplifier-adder, whose output via the second integrator is connected to the input of the first limitation unit, whose output is connected to the second input of the second comparison unit, the output of the aperiodic link via the third limitation unit is connected to the direct input of the amplifier with a controlled level of limitation; the output of the second threshold device is connected to the third input of the channel cut-off unit, the output of the first comparison unit is connected to the second input of the first relay element, whose output is connected to the input of the third integrator. EFFECT: provision of monitoring of failures of the control channel not only by the position of the slide valve, but also by current in the control winding of the electrohydraulic amplifier. 2 dwg