自适应滤波器在激光陀螺抖动解调中的应用  

Application of Adaptive Filter in RLG Dither Stripping

作　　者：樊锦川[1] 吕航伟[1] 闫海峰[1] 

机构地区：[1]西安飞行自动控制研究所,西安710065

出　　处：《电光与控制》2009年第8期56-59,共4页Electronics Optics & Control

基　　金："十一五"总装重点预研课题(51309050301)

摘　　要：在激光陀螺信号解调领域,很难寻找到一种兼顾实时性和解调精度的方法,这大大限制了激光陀螺的应用领域。针对此问题研究了一种新的机械抖动激光陀螺的抖动解调方法。这种方法采用LMS自适应滤波器原理,分别将陀螺信号和角速率传感器的角位移信号作为基本输入和参考输入,经自适应滤波后得到解调结果。首先分析了这种新方法用于抖动解调的理论基础,并提出设计实现方法,最后给出一些与传统方法的对比结果。仿真结果表明,LMS自适应滤波器在静态和动态工作情况下都有很好的解调效果,解调残差明显减小,可有效降低系统解算负担。In the area of Ring Laser Gyro （RLG） dither stripping, it is difficuk to find a scheme that has nice real-time performance while keeping high accuracy, which limits the application range of RLG. Thus we put forward a new stripping method for mechanical dither of RLG. The principle of LMS adaptive filter was used, the signal of gyro and the angular displacement signal of angular rate sensor were taken respectively as the basic input and reference input. In this paper, the theory of application of this new scheme in dither stripping was analyzed firstly, the design method was presented, which was compared with some traditional methods. Simulation result showed that LMS adaptive filter is capable to strip dither signal at high accuracy in both static and dynamic state, and dither residue is diminished markedly, which can reduce the complexity of algorithm in INS.

关 键 词：激光陀螺 抖动解调 LMS自适应滤波器 

分 类 号：V241.5[航空宇航科学与技术—飞行器设计] TH744.5[机械工程—光学工程]