PROJECT TITLE :

Application of Frequency-Following Servocompensator to Unbalance Compensation in Gyro With Flexures Gimbal

ABSTRACT:

A frequency-following servocompensator is applied to a rotary gyro with flexures gimbal to eliminate the oscillating parts from the estimated signals. In the targeted gyro, a synchronous motor is fixed to a rectangular holder and a disk-type rotor is driven by the motor to generate gyroscopic couplings. The coupled 2 rotational motions of the holder are controlled by four electromagnets on the stator; the angular velocities are estimated from the control currents to control the relative displacement of the holder to the stator. The different four-degree-of-freedom motions of the holder are constrained by the flexures gimbal. Such suspension using flexures makes the system less damped so that high accuracy is anticipated to the present gyro. However, one among the issues is that an oscillating component caused by rotor unbalance seems within the estimated signal as a result of the estimation relies on the control input. To resolve this problem, the frequency-tracking servocompensator is applied to eliminate the oscillating element. The virtually perfect elimination of the part from the estimated signal was achieved.