Regulating parameters of electromagnetic micromachined vibrating ring gyroscope by feedback control

Presented is a method that can regulate the resonant frequency and the quality factor (Q-factor) of an electromagnetic vibrating ring gyroscope by electronic tuning. A novel circuit is designed to control the drive mode of the electromagnetic vibrating ring gyroscope. The circuit consists of an amplifier and a phase shifter used for feedback control. The frequency split can be reduced and the Q-factor can be improved through this method. Experimental results show that the frequency shift of the drive mode can be from -6.41 to 6.38-Hz when the phase of the feedback signal shifts -90- compared with the drive signal. The Q-factor in the air can be improved from 522 to 821 when the phase of the feedback signal is not shifted. The sensitivity tests show the effectiveness of the control circuit.