一种单轴旋转捷联惯导系统高精度快速对准方法

摘要

It needs prolonging the coarse alignment time to improve the accuracy of the coarse alignment under the rocking condition.Otherwise,it can’t control the azimuth error in the small range,then the fine alignment will converge slowly.To solve this problem,a high accuracy and fast alignment method which uses reverse navigation technology is put forward for rotary SINS.This method prolongs the coarse alignment time mostly,then saves the data of SINS to carry on fine alignment.It use the data of alignmet sufficiently and improve the alignment accuracy mostly in certain alignment time.The result of test indicated this method is not only reduce amount of calculation,but also simplify the algorithm ,it can also achieve fast alignment of rotary SINS and can acquire high accuracy.All this characteristics prove that the method is valuable in engineering application.%在晃动条件下，需要延长粗对准时间来提高粗对准精度。否则，无法把方位误差控制在小角度范围内，从而导致后续的精对准无法快速收敛。针对这个问题，提出了一种利用逆向导航技术的单轴旋转捷联惯导系统高精度快速对准方法，最大限度地延长粗对准时间，并把采样数据存储下来，进行逆向精对准。这种算法充分地利用了对准数据，在固定对准时间内极大程度的提高了对准精度。试验证明，这种算法计算量小，算法简单，能实现单轴旋转捷联惯导系统高精度快速对准，且对准精度高，具有一定的工程应用价值。