A Method for Suppressing Micro-vibration Noise of Spaceborne Variable-speed CMG

Abstract

A method for suppressing micro-vibration noise of a space-borne variable-speed CMG of the present invention comprises the following steps: setting the space-borne computer to switch the sampling of the fiber optic gyroscope to high-frequency sampling through ground instructions to obtain high-frequency data of the fiber optic gyroscope; The high-frequency data is stored in the on-board computer, and downlinked to the ground through the satellite data management computer; on the satellite platform, the variable speed control torque gyro low-speed frame vibration test data, the variable speed control force prevents the gyro from sliding noise, and the variable speed control force prevents the gyro from working normally Acquisition of conditional noise and variable speed control force and gyroscope start-up noise; sequentially perform FFT transformation on the acquired time domain data to obtain the relationship between the frequency domain response characteristics and CMG periodic motion, and obtain the CMG noise disturbance of the working condition through the frequency domain response spectrum frequency point; the present invention solves the limitation problem that the existing micro-vibration measurement technology has been using the whole satellite micro-vibration test.

Description

technical field [0001] The invention belongs to the field of low-earth orbit satellite attitude and orbit control, and relates to a method for analyzing the micro-vibration influence of a space-borne variable-speed CMG by using an optical fiber gyroscope. Background technique [0002] This patent originates from the mechanical micro-vibration test process after the whole satellite integration of the commercial remote sensing satellite control subsystem. The variable-speed control moment gyro (CMG) product of the commercial remote sensing satellite control subsystem is the core product of the model, and its micro-vibration disturbance characteristics directly affect the control accuracy and stability of the satellite. The suppression and suppression effect of the disturbance often determine the final attitude stability index of the satellite. [0003] The variable speed control torque gyroscope newly developed by Aerospace 502 Institute has the characteristics of miniaturiza...

AI Technical Summary

Problems solved by technology

However, the whole-satellite micro-vibration test can only solve the specific working conditions on the ground, and the analysis ability for the whole-satellite full-test conditions or the actual on-orbit flight conditions of the satellite is insufficient, and the state setting is relatively cumbersome, which is not conducive to real-time disturbance analysis

[0005] Since the output bandwidth of the gyroscope used for satellite measurement is not high, it is difficult to capture high-frequency characteristics, and it is often impossible to obtain the high-frequency attitude component of the satellite.

And such high-frequency components actually act on the satellite body and affect the attitude stability of the satellite in real time

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