Control device of digital electric steering engine and control method

Abstract

The invention provides a control device of a digital electric steering engine and a control method. The control method comprises the steps that a steering surface deflection angle given signal is subjected to voltage transformation, filtering and amplitude limiting processing by a signal conditioning circuit, and sent to a controller DSP (Digital Signal Processor) by AD (Analogue-to-Digital) conversion; the DSP outputs a digital control signal; the digital control signal is subjected to digital isolation and then sent to a driving circuit to be converted into a power control signal; a brushless DC (Direct Current) motor is controlled to operate by controlling a main power circuit, and drives a steering surface to deflect through a transmission gear set to follow the steering surface deflection angle given signal; the bus current of the brushless DC motor is sampled by a current sensor and fed back to the DSP; an angle sensor connected with the transmission gear set feeds back a current deflection angle of the steering surface in real time and sends the current deflection angle to the DPS. The control device and the control method effectively accelerate frequency response of a brushless DC electric steering engine, and improve the interference immunity of a system.

Description

technical field [0001] The invention relates to a control device and a control method for a digital electric steering gear, in particular to a brushless DC electric steering gear with fast dynamic response for aircraft. Background technique [0002] The electric steering gear is a high-precision position servo system. The working principle of the steering gear is to receive the given signal of the rudder surface deflection angle given by the main control computer. After the feedback signal is processed and program adjusted, the deflection of the rudder surface is manipulated by outputting instructions, thereby changing the flight posture or flight trajectory of the aircraft, and finally ensuring that the aircraft flies in the air according to the predetermined trajectory. The electric steering gear is the front-end executive part of the aircraft. During high-speed flight, it must directly bear air friction and resistance, and the working environment is harsh. Under the premi...

AI Technical Summary

Problems solved by technology

The invention patent "A Digital Steering Gear Controller" with the publication number CN102854814A proposes a digital electric steering gear scheme based on the DSP module, but it only proposes the overall structural scheme of the system. For each functional module of the system and specific The control method is not given in detail

The article "A Permanent Magnet Brushless DC Electric Steering Gear Four-Quadrant Control" published in "Acta Electrotechnical Society" provides an improved electric steering gear control scheme based on current hysteresis control on the basis of PID, but this improvement It is aimed at the suppression of system output torque ripple, and it does not help the most important performance of the electric steering gear, the fast response speed in a complex working environment.

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