A method of active suppression of high-frequency noise applied to electric steering gear

Abstract

The invention discloses a high frequency noise active suppression method applied to an electric steering engine. The method comprises the following process: vibration information in the flight process is acquired in real time by using an aircraft vibration sensor, and FFT transformation is performed on the vibration information so as to obtain the frequency and the amplitude of high frequency noise; meanwhile, a notch filter is additionally arranged for a deviation signal generated after feedback calculation of the electric steering engine position instruction and electric steering engine current in an electric steering engine control system to filter the deviation signal, the central filtering frequency and the filtering depth of the notch filter are the frequency and the amplitude of the high frequency noise identified by the vibration sensor, and the central frequency and the amplitude of the notch filter are adaptively corrected in real time according to the variation of the frequency and the amplitude of the high frequency noise. The method has the advantages that the current high frequency signal is accurately processed by using the notch filter so as to eliminate the influence of the high frequency noise on the electric steering engine.

Description

technical field [0001] The invention relates to the control technology of an aircraft electric steering gear system, in particular to an active suppression method for high-frequency noise applied to an electric steering gear. Background technique [0002] The electric steering gear is the executive mechanism of the flight control system of the aircraft. Its function is to control the deflection of the rudder surface according to the control command, generate the steering torque, and control the flight trajectory and attitude of the aircraft. The working environment of aircraft electric steering gear is very harsh and complex, and high-frequency jitter is prone to occur. The high-frequency noise signal generated will enter the control system through the command channel and sensor feedback loop, so that the control quantity in the system is superimposed with high-frequency components, resulting in power drive system. If the output is saturated, the motor will heat up rapidly, ...

AI Technical Summary

Problems solved by technology

The working environment of aircraft electric steering gear is very harsh and complex, and high-frequency jitter is prone to occur. The high-frequency noise signal generated will enter the control system through the command channel and sensor feedback loop, so that the control quantity in the system is superimposed with high-frequency components, resulting in power drive system. Saturated output, the motor will heat up sharply, which will greatly reduce the performance of the electric steering gear, and even cause failure and damage

[0003] In order to solve the adverse effects of high-frequency noise signals on the electric steering gear control system, the current measures taken for the control system are to add notch filters to filter high-frequency noise with a certain frequency and amplitude range. Due to high-frequency noise It has time-varying characteristics. In order to improve the robustness of the filter, the filter frequency band of the filter design will be wider, which will lead to the reduction of the dynamic characteristics of the control system, especially the significant increase of the phase delay, sacrificing the performance of the electric steering gear

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