摘要
激光陀螺的输出信号中包涵外界输入角速度、机械抖动角速度两部分信息,而机械抖动角速度是一个叠加了一定噪声的标准正弦振动;在此提出了一种正弦抖动剥除技术,能极大地衰减激光陀螺输出信号中的正弦分量,实现对陀螺输出信号的初步解调,并采用FPGA作为实现工具;文章首先对激光陀螺输出信号特性进行了分析,提出了一种新型的抖动剥除技术的理论模型;然后具体介绍了这种技术在FPGA上的实现方法;最后利用基于本技术设计的FPGA+DSP系统对某型号激光陀螺进行了测试,通过观察证明本方法能很好地实现激光陀螺正弦抖动剥除,剥除后的激光陀螺正弦幅值能衰减到原始值的1/70。
In the output signal of laser gyro, there is not only containing the external input angular rate signal, but also the angular rate of dithered signal . The dithered signal is a standard sinusoidal vibration which superposes certain noises. This paper studies a sinusoidal dithered--stripping technology, which can greatly attenuate the sinusoidal component in the output signal of laser gyro, then realize the primary demodulation. FPGA is the implemental tool in this paper, firstly article analyses the characteristics of laser gyro＇s output signal, and propose a new type of dithered stripping theoretical mode. Finally, according to this technology designed with the FPGA -- DSP system , which has been tested for different laser gyros, this method can well realize the sinusoidal dithered--stripping technology and the sinusoidal＇ amplitude can decay to the original value＇ 1/70.
出处
《计算机测量与控制》
北大核心
2014年第1期207-209,共3页
Computer Measurement &Control
