捷联寻北信号采集系统研究

基于捷联寻北信号采集系统，提出了一种在不同地理纬度下准确获得陀螺数据拟合曲线的方法。首先计算得出了在不同地理纬度下动调陀螺输出的电流大小，根据其变化调整信号采集模块的采样电阻值，设计了基于数字电位器的自调整采样电阻系统；然后数据处理系统根据采集到的陀螺信号自动计算工作地点的地理纬度，自调整采样电阻系统通过地理纬度自动设置采样电阻的阻值，进而获得准确的数据拟合曲线。本方法确保了寻北仪在不同地理纬度时满足寻北精度要求，适应性强，稳定性高。

Signal sampling system of strap-down north seeking

We proposed a method to accurately acquire the sin wave curve of strap-down north seeking signal acquisition system at different latitudes .According to the current value of dynamically tuned gyro output at dif-ferent latitude we designed a system which can automatically adjust the sample resistor value using digital po -tentiometer .The data processing system calculates the latitude automatically based on dynamically tuned gyro signal and then the signal acquisition system resets the acquisition resistor value , and thus we can acquire the sin wave curve efficiently .Using this method we ensure that the north finder can meet the accuracy require-ments at different geographical latitudes , and has strong adaptability and high stability .