A dual redundant hot backup actuator electromagnetic lock opening and closing monitoring circuit

Abstract

The invention relates to a double-redundancy hot backup actuator electromagnetic-lock locking, unlocking and monitoring circuit. The circuit comprises a DSP controller and an actuator electromagnetic-lock, and the unlocking, locking and monitoring circuit comprises two controlling circuits, two locking and unlocking circuits, two voltage monitoring circuits and two current monitoring circuits. Thetwo locking and unlocking circuits work in a double-redundancy hot backup mode, and when electromagnetic-lock unlocking fails in one locking and unlocking circuit, the other locking and unlocking circuit can independently realize the locking and unlocking of the electromagnetic-lock, and the reliability of unlocking and locking is thus improved; and the monitoring circuit can realize locking-unlocking state checking and circuit health state evaluation and then transmits state information and circuit health state evaluation to a remote main control station. The double-redundancy hot backup actuator electromagnetic-lock locking, unlocking and monitoring circuit has an isolation function, a second optical coupler, a fourth optical coupler and a third power supply module can achieve control and detection of a locking mechanism and effective isolation of the locking mechanism; and when the electromagnetic-lock breaks down, a load can be isolated from a power supply, and more serious consequences are thus avoided.

Description

technical field [0001] The invention relates to an electromagnetic lock opening and closing and monitoring circuit of a dual redundant hot backup actuator, which belongs to the field of digital control. Background technique [0002] The electromagnetic lock of the electromechanical actuator is commonly used in the servo system of the launch vehicle. Its function is to lock the rotor shaft when the servo is not powered on, so as to realize the function of locking the ball and socket nozzle at zero position during horizontal storage or transportation; the electromagnetic lock is released when the power is turned on. Open to realize normal servo function. If the electromagnetic lock does not lock the rotor shaft when the power is off, it will cause the ball and socket nozzle to sag and cause collision damage to other components in the rocket; The lock inertia causes changes in the servo characteristics to affect the flight mission. [0003] The current unlocking circuits of e...

AI Technical Summary

Problems solved by technology

If the electromagnetic lock does not lock the rotor shaft when the power is off, it will cause the ball and socket nozzle to sag and cause collision damage to other components in the rocket; Lock inertia causes changes in servo characteristics and affects flight missions

[0003] The current unlocking circuits of electromechanical actuators all adopt a single-way unlocking method. The switching power supply and optocoupler in the circuit have multiple failure modes. When the components are damaged, the normal unlocking will not be completed, resulting in the failure of the flight mission. In the past, the electromagnetic lock opening and locking circuit of the electromechanical actuator only detects the power supply of the electromagnetic lock. When the wire between the power supply and the electromagnetic lock breaks and the electromagnetic lock works all the time, the fault of the self-resistance change cannot be monitored.

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