High Precision Measurement of Dynamic Angular Rate for Turntable in the Calibration Application of Airborne Inertial Sensor

In the calibration application of airborne inertial sensor, turntable based angular rate measurement is mainly focused on static and constant angular rate test. Relatively little research has been done on the dynamic performance testing under changes in angular rate and angular acceleration rate. A wavelet analysis-based turntable dynamic angular rate measurement method and device are proposed, which can accurately acquire the instantaneous angular rate under turntable speed variation. The dynamic rate experiments were validated for three different angular acceleration situations. The results show that the measurement accuracy of the dynamic angular rate is better than 0.38% during the rapid variation of the velocity, and reaches 0.03% during the steady phase of the rotational speed.