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 pri-mary 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.
展开▼
