Timing for miniaturized three-cluster fiber optic gyro
-
摘要: 由于光纤陀螺敏感环绕制过程中不能精确控制光纤长度,要求时序产生电路必须在不改动硬件的前提下能跟踪由敏感环光纤长度决定的光纤陀螺特征频率.利用相关检测理论,分析了调制解调信号频率准确度对陀螺标度因数误差的影响.针对三轴一体轻小型光纤陀螺仪,在满足现场可编程逻辑器件(FPGA)专用资源约束的条件下,使用一片FPGA完成了三轴调制解调信号时序的设计,并计算了其在中精度范围内跟踪特征频率的精度.实验结果表明:时序设计满足三轴一体轻小型光纤陀螺仪对调制解调信号频率准确度的要求.
-
关键词:
- 光纤陀螺 /
- 相位调制 /
- 现场可编程逻辑器件(FPGA)
Abstract: Eigen frequency of fiber optic gyro (FOG) is determined by the length of fiber coil. Since the length cannot be controlled accurately while winding, timing generator should trace the eigenfrequency expediently without modification of hardware. The influences of veracity and stabilization of modulation-demodulation signal on the scale factor of FOG was analyzed through the theory of correlation-based measurement. One chip of field programmable gate arrays (FPGA) was used to generate three timings of miniaturized three-cluster FOG within resourceconstraints, and the capacity of frequency tracing was calculated within the eigenfrequency range of middle precision FOG. Experimental results indicate that the timing scheme satisfied the requirement of miniaturized three-cluster FOG to modulation-demodulation signal.-
Key words:
- fiber optic gyro /
- phase modulation /
- field programmable gate arrays(FPGA)
-
[1] Barbour N M. Inertial navigation sensors . EN-SET-064, 2004:28 [2] Dollon M, Cros G, Sevellec A,et al. A new family of IMU based on IFOG technology . ESA SP n 516, 2003:41-45 [3] 宋凝芳,张春熹,马迎建,等. 闭环光纤陀螺数字检测电路的集成化[J].北京航空航天大学学报,1999,25(6):732-734 Song Ningfang, Zhang Chunxi, Ma Yingjian, et al. Integration of digital detecting circuit for close-loop FOG[J]. Journal of Beijing University of Aeronautics and Astronautics, 1999,25(6):732-734(in Chinese) [4] 曾庆勇. 微弱信号检测[M].杭州:浙江大学出版社,1994 Zeng Qingyong. Weak signal detection[M]. Hangzhou:Zhejiang University Press, 1994(in Chinese) [5] Lefevre H C. The fiber-optic gyroscope[M]. Boston:Artech House, INC, 1993 -
点击查看大图
计量
- 文章访问数: 2546
- HTML全文浏览量: 146
- PDF下载量: 1080
- 被引次数: 0
下载:
