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保证陀螺经纬仪寻北精度的同时,缩短寻北时间实现快速寻北具有重要意义.从陀螺仪寻北原理出发,建立陀螺运动轨迹的数学模型.基于数字化测量光路建立了非线性回归模型,通过欠周期的采集数据,预测整周期函数信息,研究1/8周期快速寻北方法,实现陀螺开始寻北1 min以内高精度快速寻北,开辟快速寻北的新途径.以改进型JT-15陀螺仪为样机的寻北试验表明,在陀螺开始寻北56 s内,仪器寻北测量精度优于0.831 1’.
It is of great significance to ensure the gyro theodolite seeks north precision while shortening the north seeking time to achieve rapid north finding.A mathematical model of the gyroscopic locus is established based on the gyro north seeking principle.The nonlinear regression model is established based on the digitized measuring light path, Cycle of the collected data, predict the whole cycle of function information, research 1/8 cycle fast North seeking method to achieve gyroscope began within 1 min north to find high-precision fast north, opening up a new way to quickly find North to improve JT-15 gyro The north-seeking test of the prototype for the prototype shows that the north-seeking accuracy of the instrument is better than 0.831 1 ’within 56 s from the beginning of gyro.