传感技术学报
傳感技術學報
전감기술학보
Journal of Transduction Technology
2014年
1期
79-83
,共5页
激光陀螺%抖动解调%自适应滤波器%FPGA数字滤波
激光陀螺%抖動解調%自適應濾波器%FPGA數字濾波
격광타라%두동해조%자괄응려파기%FPGA수자려파
laser gyro%dither stripping%LMS adaptive filter%FPGA digital signal process
在激光陀螺信号解调领域中,在满足高精度的前提下如何降低滤波器的延迟一直是相关院所的研究重点。针对此问题,研究了一种新的激光陀螺滤波处理的方法。这种方法采用LMS自适应滤波器原理,分别把机械抖动抖反馈信号作为滤波器的基本输入,把机抖信号、随机噪声和白噪声作为滤波器的参考信号,然后通过FPGA进行数字滤波以及外围控制,最后给出了滤波器的算法实现以及硬件框图。实验结果表明,LMS自适应滤波器有很好的解调效果,经过滤波后的计数值差值在±1个数以内,且延时为1 ms。
在激光陀螺信號解調領域中,在滿足高精度的前提下如何降低濾波器的延遲一直是相關院所的研究重點。針對此問題,研究瞭一種新的激光陀螺濾波處理的方法。這種方法採用LMS自適應濾波器原理,分彆把機械抖動抖反饋信號作為濾波器的基本輸入,把機抖信號、隨機譟聲和白譟聲作為濾波器的參攷信號,然後通過FPGA進行數字濾波以及外圍控製,最後給齣瞭濾波器的算法實現以及硬件框圖。實驗結果錶明,LMS自適應濾波器有很好的解調效果,經過濾波後的計數值差值在±1箇數以內,且延時為1 ms。
재격광타라신호해조영역중,재만족고정도적전제하여하강저려파기적연지일직시상관원소적연구중점。침대차문제,연구료일충신적격광타라려파처리적방법。저충방법채용LMS자괄응려파기원리,분별파궤계두동두반궤신호작위려파기적기본수입,파궤두신호、수궤조성화백조성작위려파기적삼고신호,연후통과FPGA진행수자려파이급외위공제,최후급출료려파기적산법실현이급경건광도。실험결과표명,LMS자괄응려파기유흔호적해조효과,경과려파후적계수치차치재±1개수이내,차연시위1 ms。
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.