针对实验过程中转台在每个转位处存在的转位误差对系统寻北精度的影响,介绍了动调陀螺多位置寻北仪的工作过程及真北解算原理,进行了转位误差对寻北精度影响的误差分析。运用误差理论和偏导数原理,推导出转位误差与寻北误差二者之间的关系模型。理论分析及实验结果表明,在相同寻北位置数的情况下,转位误差越小寻北精度越高;同时在一定的转位误差时,寻北位置数越多则寻北精度越高。根据理论分析,提出了两种不同的误差补偿方法。

In order to reduce the influence of position error in every standstill-position of turntable on north-seeking precision,the work process of the Dynamically Tuned Gyro (DTG) multi-position north seeker and the principle of the azimuth arithmetic are introduced,and the relation between position error and north-seeking precision is analyzed. The mathematical model between position error and north seeking error is gotten through error theory and partial derivative principle. The analyses of theory and results of experiment show that,in the condition of the same north-seeking points,the less position error is,the higher north-seeking precision is; in the condition of the same position error,the more north-seeking points are,the higher north-seeking precision is. According to the theoretical analyses,two error compensation methods are presented.