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为了解决初始对准中速度与精度相矛盾的问题,提出了静基座下引入陀螺测量误差信息的捷联快速双位置对准方法。在常规对准方法基础上,增加陀螺测量角速度信息为观测量,提高系统可观测度,提升滤波器的收敛速度。针对双位置单滤波器方位失准角估计慢的问题,提出双位置双滤波器的对准方案。仿真验证表明,该方案方位失准角的估计精度与水平失准角相当。该方法切实可行,对提高惯导系统的可观测性和缩短对准时间,有重要的参考价值。
In order to solve the contradiction between speed and accuracy in the initial alignment, a fast strapdown rapid dual-position alignment method based on static measurement error information is proposed. Based on the conventional alignment method, the angular velocity information of gyroscope is added as observational quantity, the observability of the system is increased, and the convergence speed of the filter is improved. Aiming at the problem of slow estimation of azimuth misalignment angle of dual-position single-filter, a dual-position dual-filter alignment scheme is proposed. Simulation results show that the estimation accuracy of azimuth misalignment of this scheme is equivalent to that of horizontal misalignment. This method is feasible and has important reference value for improving the observability and shortening the alignment time of INS.