一种谐振式光学陀螺仪多频锯齿波调制系统及方法
By using a four-frequency or multi-frequency sawtooth wave modulation and demodulation method, the half-wave voltage variation of the phase modulator is demodulated and compensated, thus solving the scaling factor error problem of broadband light source resonant optical gyroscopes and improving the accuracy and stability of the system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- XIAN FLIGHT SELF CONTROL INST OF AVIC
- Filing Date
- 2023-08-28
- Publication Date
- 2026-07-17
AI Technical Summary
Wideband light source resonant optical gyroscopes suffer from scaling factor error, especially the error caused by temperature variation in the half-wave voltage of the phase modulator, which affects the system accuracy.
By employing a four-frequency or multi-frequency sawtooth wave modulation and demodulation method, the change in the half-wave voltage of the phase modulator is demodulated, and compensation is made by adjusting the amplitude of the sawtooth wave modulation signal, thus forming a closed-loop feedback control for the half-wave voltage error of the phase modulator.
This effectively reduces the system scaling factor error caused by temperature variations in the half-wave voltage of the phase modulator, thus improving the system's accuracy and stability.
Smart Images
Figure CN117232491B_ABST