Couple unbalance identification method based on gyro flywheel moment coil current

The invention relates to a gyro flywheel couple unbalance identification method, particularly to a couple unbalance identification method based on gyro flywheel moment coil current, and aims to solve the problems that during running of existing gyro flywheels, couple unbalance can cause flywheel rotor tilt vibration and moment coil moment noise, accordingly the gyro flywheel moment output accuracy is low, the gyro flywheel attitude measurement accuracy can be affected, and in a severe case, system instability or even component damage can be caused. The method includes: 1. determining couple unbalance identification rotation speed; 2. under different trial weight conditions, conducting moment coil current signal data acquisition and spectral analysis to obtain a current signal spectral analysis result; and 3. utilizing the current signal spectral analysis result obtained in step 2 to identify gyro flywheel original couple unbalance based on influence coefficient method; and 4. performing gyro flywheel couple u