【摘要】 本文基于采用对地球自转角速率的北向分量在光纤陀螺上的输出进行正弦调制的办法 ,提出了一种新型的非机械陀螺定向系统。该系统通过对光纤陀螺的正弦输出信号进行数据采样及处理 ,利用最小二乘算法对正弦输出信号进行参数估计 ,计算出角速率输出的初始相位 ,从而确定出地球表面被测点子午面的真北方向 ,即系统的基准方位。同时 ,通过与光纤陀螺对称放置的加速度计可以测量出台面倾斜误差 ,可对光纤陀螺的数据输出量进行补偿 ,大大提高了系统的定向精度。该系统尤其适合军事领域应用的需要更多还原

【Abstract】 In this paper,we presents a dynamic orientation scheme based on the modulation output of fiber optic gyroscope, which is the north component of the earth rotation angular. In this scheme, the sin e output signal of the FOG is sampled and disposed, and then the real north of surveyed point on the surface of earth is calculated with the least square estimation method. Thus the random coordinate azimuth is determined. Furthermore, the deviation caused by base tilt and axle mounting can be compensated by the accelerometer measuring, by which the precision of north-finding can be greatly improved. This scheme is especially suitable to the military application.更多还原