光纤陀螺随机误差的DDS建模方法研究

Research on DDS modeling of Fiber Optic Gyroscope random error

光纤陀螺漂移具有弱非线性和弱时变的特点。为了更准确的描述这种特性,介绍了非平稳时间序列的DDS建模方法,并对光纤陀螺随机误差进行建模。通过对建模结果的脉冲响应分析,表明DDS建模法可以准确对光纤陀螺随机误差进行建模,并分离出随机误差中的随机斜坡项,可以实现对光纤陀螺随机误差更精确的补偿。

Fiber Optic Gyroscope random drift has weak nonlinearity and weak time-varying characteristic.In order to accurately describe the characteristic,this paper introduces the DDS modeling method of non-stationary time series,and models for the Fiber Optic Gyroscope random errors.Through analysing the pulse response of modeling result,it shows that DDS modeling method can accurately make modeling of Fiber Optic Gyroscope,and isolate the random slope items of the random error.Therefore,a more accurate compensation of the FOG random error can be taken with this method.