In order to improve measurement-precision of the gyro, the gyroscope experiment is completed based on
gyroscope servo technology. The error sources of gyroscope servo technology are analyzed in process of measurement, and the impact of these error sources on measurement is evaluated. To eliminate interference signal existing in the sampled data of the measurement, a modified wavelet threshold filtering method is proposed. The results of the simulation and measurement show that, the estimation-precision of the proposed method is improvemented remarkably compared with the fast Fourier transform (FFT) method, and the calculation work is reduced compared with the conventional wavelet threshold filtering methods, furthermore, the phenomenon of a common threshold of“killing”is solved thoroughly.