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寻北系统以地球自转角速度作为输入基准,利用陀螺仪和加速度计分别测量地球角速度的分量及载体的倾角,对数据进行捷联解算后获得基准轴与真北方向的夹角,从而得到载体的某一固定轴与北向的夹角。由于系统中存在着很多误差因素,它们将直接影响系统的寻北精度。作为一种精密惯性仪表,寻北系统的精度与其选用的敏感元件、结构安装及用于计算的参数等都有极其重要的关系,通过对系统的误差进行分析,找出合适标定试验方法,通过对系统进行补偿后保证系统的精度。
The North-seeking system takes the earth rotation angular velocity as the input datum, and uses the gyroscope and accelerometer to measure the components of the Earth’s angular velocity and the carrier inclination respectively. After the data are solved by the strapdown method, the angle between the reference axis and the true North direction is obtained and the carrier The angle between a fixed axis and the north. Because there are many error factors in the system, they will directly affect the north-seeking accuracy of the system. As a precision inertial instrument, the accuracy of North-seeking system is very important to the selection of sensitive components, structural installation and parameters used in the calculation. By analyzing the error of the system, we can find out the appropriate calibration test method, Compensate the system to ensure the accuracy of the system.