METHOD FOR ADJUSTMENT OF RATED CURRENT CONTROL OF AIRCRAFT DRIVE OPERATING SOLENOID AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2017 - IPC F42B15/00 

FIELD: aircraft engineering.

SUBSTANCE: group of inventions relates to aircraft control systems and can be used in rocket steering drive control circuit with pulse-width control method. In the proposed control method of rated current control of the operating solenoid (OS) the pulse-width control modulated signal (PWM-signal) is exposed to additional modulation, where upon activation of OS according to said control signal in time t₀ a signal for switching off current in the OS excited winding with the T_off duration is formed, at the end of which a signal for switching on current in said winding with the T_on duration is formed. Signal cycle with the T_off and T_on duration is repeated until the tripping winding in accordance with the control signal. At that, the duration t₀, T_off and T_on is selected so that, in order rated current to be more than actuation current at the moment of the OS armature arrival on thrust. Device for the method implementation comprises a power supply source, a PWM control signal shaper, the output of which is connected to the coincidence circuit first input, series-connected load in the form of the OS winding and an electronic key, control input (transistor base) of which is connected to the coincidence circuit output, and an emitter output - to one of the outputs of the power supply source. Apparatus includes a clock pulse generator and a current regulator, consisting of a counter, outputs D3, D4, 15 of which are connected to inputs of the OR element respectively, output of which is connected to the second input of the coincidence circuit, and two series-connected D-triggers, "O" outputs of which are connected to "RST" input through the XOR element, and the "C" inputs of D-triggers and the counter are connected to the clock pulse generator, at that, the "D" input of the first D-trigger is connected to the PWM control signal shaper output, and the second output of the OS winding is connected to the other output of the power supply source.

EFFECT: objective of the inventions group is reduction of power consumption by the steering drive at increase in power of the operating solenoid (OS) in order to increase its efficiency.

2 cl, 4 dwg