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目前,三浮陀螺仪误差模型包含沿输出轴的一次项误差系数D_0,该误差项尚无明显的物理意义,但|D_0|的标定结果在0.0002(°)/(h·g)~0.015(°)/(h·g)。针对三浮陀螺仪的结构特点和测试方法分析了D_0的产生机理,通过调整安装误差角的试验说明安装误差角带来的天向地速和一次项分量会影响D_0,因此系统在选用陀螺误差模型时,需关注由测试方法带来的误差。同时,陀螺在设计、生产和调试过程中对安装误差角的影响应予以重视。最后用统计检验的方法说明D_0对误差模型的线性影响不显著,为系统选取陀螺误差模型提供依据。
At present, the error model of the three-floating gyroscope contains the first order error coefficient D_0 along the output axis. The error term has no obvious physical meaning, but the calibration result of | D_0 | is in the range of 0.0002 (°) / (h · g) to 0.015 °) / (h · g). According to the structural characteristics and testing methods of the three-floating gyroscope, the mechanism of D_0 is analyzed. The test results of the installation error angle show that the azimuthal ground velocity and the one-time component caused by the installation error angle will affect D_0. Therefore, When modeling, pay attention to the error caused by the test method. At the same time, the gyroscope should pay attention to the influence of the installation error angle in the process of design, production and debugging. Finally, the method of statistical test shows that the linearity of D_0 to the error model is insignificant, which provides the basis for the system to select the gyro error model.