减小动态误差的捷联系统姿态算法研究

针对陀螺输出信号的两种不同形式 ,以圆锥运动条件下的圆锥误差和计算量为指标 ,对捷联惯导系统姿态计算中的旋转矢量算法和旋转矢量迭代算法进行了研究 ,分析了由角速度提取角增量的方法对旋转矢量算法精度的影响 ,提出二子样迭代算法不如单步的三子样算法优越。

AN ATTITUDE ALGORITHM FOR STRAPDOWN INERTIAL NAVIGATION SYSTEMS WITH DECREASED DYNAMIC ERROR

On the basis of cone error and computational load as criteria, the rotation vector algorithm and rotation vector iteration algorithm in the attitude calculation of strapdown inertial navigation systems are studied regarding two different types of outputs of the gyro. The influence on the accuracy of the rotation vector algorithm when using the method of extracting angular increment from the angular velocity is analysed. It is shown that the two sample iteration algorithm is less expedient when compared to the single step, three sample iteration algorithm.