采用反馈补偿技术的激光陀螺抖动解调算法  

A Feedback Compensation Algorithm for RLG Dither Stripping

作　　者：樊锦川[1] 方忠春[1] 吕航伟[1] 

机构地区：[1]西安飞行自动控制研究所,西安710065

出　　处：《光电工程》2012年第9期108-112,共5页Opto-Electronic Engineering

基　　金："十一五"总装重点预研课题"高精度激光陀螺技术"(51309050301)

摘　　要：陀螺信号解调是激光陀螺研究领域中的一个重要课题,但一直以来却很难找到一种兼顾实时性和解调精度的方法。针对此问题,研究了一种新的基于高频采样的抖动解调算法。这种算法使用陀螺信号与角速率传感器信号作差的结构以满足实时性的要求,同时采用反馈闭环技术补偿角速率传感器信号,以减小环境影响提高解调精度。文中详细阐述了新算法解调原理,给出了具体的设计实现方案,并与传统的一些解调方法做了仿真对比。仿真结果表明,在静态和动态工作情况下,新算法的解调残差明显减小,信号处理时间延迟很小,这些特点使激光捷联系统在高动态载体上的应用成为可能。The stripping for dither signal is an important subject in the field of Ring Laser Gyro （RLG）, but there has hardly been a stripping scheme that does not cause time delay or has high accuracy, which limits the range of RLG application badly. According to the problem, a new algorithm based on high frequency sampling for RLG dither stripping was studied, which provides real time output signal due to subtraction between signals from gyro and angle rate sensor, and decreases effect from environment by compensating angle rate signal within a feedback loop. Firstly, the theory of this new algorithm in dither stripping was analyzed, then material design was given, and it was compared with former schemes in simulated result lastly. According to the conclusion from simulation, the new algorithm reduces dither residue greatly in the static and dynamic state, and hardly cost time, which makes it possible that the strapdown inertial navigation system based on RLG is used in high dynamic aircraft.

关 键 词：激光陀螺 抖动解调 反馈补偿 

分 类 号：TH744.5[机械工程—光学工程] TN249[机械工程—仪器科学与技术]