Abstract
A digital closed-loop drive control circuit was designed based on digital signal processing(DSP) to improve the stability of the drive signal of double H quartz tuning fork gyroscope, and the frequency tracking algorithm of drive signal was proposed. Considering that the vibration amplitude of the drive tuning fork had a minimal impact with the frequency change, a phase control loop was used to track drive mode resonant frequency, and a pair of quadrature reference signal generated from Hilbert transformer were used to detect phase. Experiments have shown that the phase standard deviation of proposed frequency tracking algorithm is 4 mrad and the frequency tracking accuracy is up to 0.003 4 Hz when the double H quartz tuning fork gyroscope is in stable operation.
| Original language | English |
|---|---|
| Pages (from-to) | 1159-1161+1164 |
| Journal | Beijing Ligong Daxue Xuebao/Transaction of Beijing Institute of Technology |
| Volume | 32 |
| Issue number | 11 |
| Publication status | Published - Nov 2012 |
Keywords
- Digital signal processing(DSP)
- Quartz tuning fork gyroscope
- Series resonant frequency