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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 gyro drift with weak nonlinear and weak time-varying characteristics. In order to describe this characteristic more accurately, the non-stationary time series DDS modeling method is introduced and the random error of fiber optic gyroscope is modeled. The impulse response analysis of the modeling results shows that the DDS modeling method can accurately model the random errors of the fiber gyroscope and separate the random slope items in the random errors so as to achieve a more accurate compensation of the random errors of the fiber optic gyroscope.