【摘要】 针对调制型捷联系统中光纤陀螺误差系数随时间变化的问题,提出一种利用双轴转位机构实现陀螺六位置静态标定方法.根据光纤陀螺仪误差模型,利用转位机构设计六位置标定路径,激励出陀螺仪标度因数、安装误差和零位,标定新方案避免了陀螺仪误差系数的耦合.分析了转位机构的转位误差对标定精度的影响,并利用调制型捷联系统导航实验对六位置标定方案进行原理性验证.结果表明,六位置标定方法所引起的系统定位精度优于传统标定方法.更多还原

【Abstract】 Aiming at the problem that the error coefficients of interferometric fiber optic gyroscope(IFOG) are not stable and vary with time slowly in rotary strapdown inertial navigation system,a calibration method based on the six-position is proposed in this paper.According to the error model of IFOG,the error parameters of IFOG,such as scale factor,installation error and zero drift,can be calculated through the six-position calibration path which is proposed by two-axis indexing. Coupling errors between the scale factor and the misalignment can be avoided by using this method.The calibration precision which is caused by the indexing error is analyzed,and the principle of the proposed calibration is validated by the rotary strapdown inertial navigation system(SINS) navigation experiment.The experiment results show that the position accuracy using the proposed method is higher than the traditional one.更多还原