This paper estimates the principle of two-axis angular velocity measurement in gyroscopic sensor using active magnetic bearing. In the sensor, angular velocities are measured based on the control signals to cancel gyroscopic toques operated to the shaft in the AMB. In measuring two-axis angular velocity at the same time, the control signals to cancel inertial toques must be considered in addition to the gyroscopic toques for precise measurement. However, effect of the considering the control signal to cancel the inertial toque never been revealed. The effect is studied in this paper.
