采用旋转调制技术的高精度陀螺寻北方案

High-precision north determining scheme based on rotation-modulation technology

多位置寻北法只有在采样位置足够多的条件下才能有效地降低陀螺漂移、陀螺刻度系数误差等的影响,提高寻北精度。但要在规定的时间内完成较多位置的采样在工程实现上比较困难。为此利用先进的旋转调制寻北技术研制出了一套快速、高精度寻北仪,在原理研究的基础上探讨了系统主要误差源对寻北结果的影响。研制的样机在4 min内的寻北精度优于30″(1δ),在陀螺仪精度相同的条件下,较传统的方法大大提高了寻北精度。

With enough position sampling data,the method of multiposition north seeking can effectively reduce the gyro drift,gyro scale factor error,etc.,and improve the accuracy of the north seeking.But it is difficult to realize the multiposition sampling in engineering within the limited time.To solve this problem,a north seeker system based on spin modulation is developed.Based on the study of its principle,the influences of the system’s main error sources on the north-finding results are studied.The prototype experiment results show that the north-seeking accuracy of the prototype is superior to 30″（1δ） in 4 min,and under the same conditions of gyro accuracy,this system significantly improve the north seeking accuracy compared to that of traditional ones.