陀螺振荡误差对方位对准的影响

Effect of oscillation gyro errors on INS azimuth alignment

通过对实验数据的研究发现,光纤陀螺仪测量的角速率中存在一部分低频振荡误差,此种误差会影响惯性导航系统初始对准的稳定性。为了抑制陀螺振荡误差所产生的影响,从频域角度对罗经法对准系统的频率特性进行了研究,分析了不同频率的陀螺振荡性误差对方位对准的影响形式。最终提出了抑制陀螺低频振荡误差的罗经法对准参数设计方案。经过理论分析以及半实物仿真,结果表明,按此种方法设计出的系统能够有效地抑制陀螺振荡性误差对方位对准所产生的影响。

Research show that the output of fiber optic gyroscope（FOG） contains low-frequency oscillation errors which can significantly influence the stability of gyro-compassing alignment.In order to eliminate the negative effect of gyroscope oscillation errors on azimuth alignment,frequency domain analysis method is used to analyze the frequency characteristics of gyro-compassing alignment system.In addition,the impacts of gyroscope oscillation error of different frequencies are introduced.Finally,a design approach of gyro-compassing parameter is introduced.The theoretical analysis and experimental results show that the impacts of oscillation errors can be effectively restricted by utilizing this approach.