Design of Adaptive Filter Based on Laser Gyroscope Signal Demodulate

In the area of Ring Laser Gyro( RLG) dither stripping,how to reduce the group delay of RLG filter at the premise of high accuracy is one of the most important works that many relative universities and the research departments are undertaking. We put forward a new dither stripping method for RLG. The principle of LMS adaptive filter was used,the mechanical dithered feedback signal were taken respectively as the basic input,and the mechanical dithered signal,random noise,white noise were regarded as the reference signal,then filter algorithm and control unit were completed in the XILINX FPGA. Experimental results show that LMS adaptive filter has a wonderful result for the RLG dither stripping,residual count of RLG can be controlled within ±1 after filtering,and only 1 ms of delay.