捷联罗经方位大失准角下的快速对准方法

为解决大失准角情况下采用传统罗经对准方法存在的收敛时间长这一问题,提出一种基于重力视运动解析对准与罗经法线性对准模型相结合的捷联罗经快速对准方法。该方法首先利用重力矢量视运动规律进行解析对准迅速实现大失准角估计,然后在小失准角情况下利用罗经法完成精确对准。仿真试验结果表明:提出的方法在小失准角下与传统罗经法具有等效性,而在大失准角时具有更快的对准速度,在系泊晃动情况下也可快速对准。

A Rapid Alignment Method under Large Azimuth Misalignment Angle for Strap-down Gyrocompass

In order to solve the problem of long convergence time under azimuth large misalignment angle when the traditional gyrocompass alignment is applied, a rapid alignment method based on gravitational apparent motion and gyrocompass linear alignment model is proposed in this paper. First, the method uses the gravitational vector motion law to process analytic alignment in order to estimate the large misalignment angle in a short time. Then, in small misalignment angle, the gyrocompass alignment method is applied to accomplish accurate alignment. The simulation experiment results show that the method proposed in this paper is equivalence with traditional method under small misalignment angle, and has faster alignment speed under large misalignment. In addition, the method can achieve the fast alignment of strap-down gyrocompass in swaying state.