用组合滤波消除动量轮对光纤陀螺的干扰  

Eliminating the Disturbance of Momentum Wheel to Fiber Optic Gyroscope by Combined Filter

作　　者：张金保[1] 惠欣[1] 刘静 谷宝娟 岳文杰[1] ZHANG Jinbao;HUI Xin;LIU Jing;GU Baojuan;YUE Wenjie(Beijing Institute of Control Engineering,Beijing 100000,China)

机构地区：[1]北京控制工程研究所,北京100000

出　　处：《电光与控制》2021年第9期80-83,共4页Electronics Optics & Control

基　　金：装发共用技术(41417060102)。

摘　　要：针对空间用光纤陀螺,提出了一种易于在FPGA内实现的组合低通滤波技术。卫星上的执行机构——动量轮在高速旋转时,会引发星体低幅高频振动,对于卫星来说属于有害振动。如果光纤陀螺的带宽过高,则高频振动会导致光纤陀螺噪声变大,甚至出现光纤陀螺输出混频现象,从而导致卫星的控制品质变差。综合滤波器的成本和效果考虑,提出一种FIR+IIR型组合滤波器设计方案,该方案使用516个逻辑单元,只占A54SX72A芯片资源的13.8%,可以附加在光纤陀螺数字闭环的FPGA程序中,其优点是便于实现高速滤波,提高滤除高频干扰信号的效果,这样用户就不必在其他终端中单独设计滤波器,从而可降低整星的控制系统配置成本,简化空间用光纤陀螺的应用配置。A combined low-pass filtering technology for space Fiber Optic Gyroscope( FOG) is proposedwhich is easy to implement in FPGA. When the momentum wheel,i. e. ,the actuator of satellite,rotates at high speed,it will cause low-amplitude,high-frequency vibration of the satellite,which is harmful to the satellite. If the bandwidth of FOG is too high,the high-frequency vibration will lead to greater noise,and even mixed output of FOG,which will result in degraded control quality of the satellite. In consideration of both cost and effect of the filter,we propose a design scheme of FIR + IIR combined filter. The scheme uses five hundred and sixteen logic units,which only accounts for 13. 8% of the chip resources of A54 SX72 A. It can be added to the FPGA program of FOG closed digital loop. The advantage is that it is easy to realize high-speed filtering and improve the effect of filtering out the high-frequency interference signals. In this way,the users don’t have to design filters separately in other terminals. The configuration cost of the whole satellite control system is reduced,and the application configuration of space FOG is simplified.

关 键 词：光纤陀螺 组合低通滤波技术 FPGA 高速采样滤波 

分 类 号：V19[航空宇航科学与技术—人机与环境工程]