摆式陀螺经纬仪粗寻北的新方法

New method of rough north seeking applied in gyro-theodolite

针对现有摆式陀螺经纬仪粗寻北方法存在的不足,提出利用检测陀螺力矩实现陀螺经纬仪粗寻北的新方法。推导了陀螺力矩对轴承的水平作用力与陀螺主轴方位角之间的数学公式,在地球自转角速度相对陀螺转子角速度非常小的情况下,对公式进行了简化和仿真运算。采用该方法改进了某型号陀螺经纬仪的粗寻北,实验表明在不影响陀螺经纬仪测量精度的前提下,简化了操作程序,缩短了测量时间。

A new method by inspecting gyro＇s moment was presented to overcome the deficiencies existed in rough north-seeking. The angle between the principle axis of gyro and the horizontal force was deduced, in which the gyro＇s moment was imposed on the bearing. The formula was simplified and simulated under the condition that the rotation rate of the earth was lower than that of the gyro rotor. Rough north-seeking in a gyro-theodolite was improved by using the new method. The experiments verify that the method could simplify the operation and shorten the measure time on the premise that the measurement precision is ensured.