改进的动调式陀螺测斜系统校准方法研究

An Improved Calibration Algorithm for Dynamically Tuned Gyroscope Inclinometer

提出了一种三次样条插值方法与回归模型相结合的动调式陀螺测斜系统校准方法。在动调式陀螺测斜系统的参数标定中需考虑陀螺本身的漂移、机械加工精度及装配精度等因素的影响。将上述因素视为整体,确定了陀螺刻度因数以及各漂移系数的数值。常用的八位置标定方法一般仅针对陀螺传感器进行标定,而不考虑系统装配误差。用动调式陀螺测斜系统校准方法与八位置标定方法进行比较,2种方法所得的测量结果统计分析表明,采用动调式陀螺测斜系统校准方法所测方位角不仅精度高、波动小,测试结果的稳定性也有很大提高。对于其他惯性测量系统也具有一定的借鉴意义。

Based on the combination of cubic spline interpolation method and regression model, an improved calibration algotithm is proposed for dynamically tuned gyroscope inclinometer. During the gyroscopes parameters calibrating process, the gyroscope scale factors and the drift coefficient values are determined by considering the influence of gyroscope drift, mechanism manufacture and assembly precision on system as a unit. The comparison between this calibrating method and common eight position method shows that this method can not only improve the measurement precision of azimuth greatly but also increase its stability. This method is a reference for other inertial measurements, too.