动基座条件下捷联惯导系统由于动态环境的影响,采用传统的解析法进行粗对准会出现较大误差,针对这一问题,通过捷联惯导比力方程变形和引入辅助速度信息,提出了一种基于广义解析法动基座粗对准方法。进行了动基座条件下的仿真,在粗对准时间不大于200s的情况下,方位角对准精度达到了0.357°,水平角对准精度0.006°,满足进一步采用线性滤波方法进行精对准的要求。该方法算法简单,计算量小,精度高,具有一定的工程应用价值。

Due to the influence of dynamic environment, large coarse alignment errors of strapdown inertial navigation system(SINS) on moving base were produced. To solve this problem, a new coarse alignment in-movement base on generalizing analytic method was presented through transforming the specific force equation and augmenting auxiliary velocities. Simulations were carried out on moving base. The results show that the azimuth alignment accuracy reaches about 0.357° and the level alignment accuracy is superior to 0.006° when the whole coarse alignment time is less than 200 s, which meets the requirement of linear filter for fine alignment. This method is more simple with less calculation. By using this method, the SINS can acquire high accuracy. All these characteristics prove that this method is valuable in engineering application.