方位大失准角下基于时变参数的捷联罗经对准方法

A time-varying gyrocompass alignment method for SINS based on large azimuth misalignment

传统的罗经对准方法都是建立在小失准角的基础上进行的快速对准方式。但是始对准技术是由于风浪、设备误差或者低精度的粗对准算法等不确定因素的影响,捷联惯导系统有时候不得不在大失准角下进行罗经对准。本文提供了一种时变罗经对准方法,以解决此种方位大失准角情况下的罗经对准问题。仿真结果表明,相对于传统的罗经对准方法,时变罗经对准方法能够在方位大失准角下快速而精确的完成初始对准。

Conventional strapdown gyrocompass alignment systems are based on relatively small azimuth misalignment angles.However systems may be faced to large azimuth misalignment angles caused by storms, large device errors and low accuracy of the coarse alignment algorithm. This paper provides a new time-varying gyrocompass alignment method that solves the question which the initial azimuth misalignment angle is too lager. And the simulations show that, compared to the conventional gyrocompass method, time-varying gyrocompass can complete the initial alignment quickly and accurately based on large azimuth misalignment angle.