摘要
针对光纤陀螺受外界环境,主要是温度影响,提出了一种控制相位调制器长期漂移的方法。用数字光纤陀螺的第二个反馈回路来控制相位调制通道的增益,尤其是2π复位来控制相位调制器相应的长期漂移。在-40°C～60°C,将标度因子的稳定性控制在0.000 4以内。在陀螺解调电路中采用FPGA进行数字信号处理,实现了两级反馈环路。
A method to control the long time drift of the phase modulator of the FOG is presented. The second feedback loop is used to control the gain of the phase modulate tunnel. The 2π replacement is used to control the drift. We want to control the scale factor under 0.0004 from -40℃ to 60℃. Digital signal is processed by FPGA in the demodulation circuit. Two feedback loops are realized.
出处
《光学与光电技术》
2005年第6期44-46,50,共4页
Optics & Optoelectronic Technology
关键词
光纤陀螺
第二反馈回路
标度因子
2π复位
FPGA
fiber optic gyroscope
the second feedback loop
scale factor
2n replacement
FPGA
