一种动基座传递对准算法性能评估的工程方法

Engineering method for analyzing the performance of INS transfer alignment on moving base

在东北天地理坐标系下,推导了捷联惯导动基座传递对准模型。在此基础上,提出了一种在不具备精确标定设备的试验条件下,进行动基座传递对准算法性能评估的工程方法。该方法基于安装误差角滤波估计结果,对子惯导的初始姿态进行修正,并重新进行子惯导的导航解算;通过比较初始姿态修正前后子惯导的导航误差,对传递对准算法的性能进行定性分析。基于试验数据的处理结果表明,所建立的对准模型和采用的对准算法性能评估方法具有重要的工程应用价值。

The principle and method for transfer alignment of INS on moving base were analyzed, and the relative models were put forward in the east-north-up frame. The method for analyzing the transfer alignment performance was presented under the situation where the equipments for precise calibration were limited or absent. A kind of compensation technique for the established angles was utilized to correct the initial navigation errors of sub-INS. By comparing the navigation errors of sub-INS between the initial attitudes before and after correcting, the qualitative analysis on the performance of transfer alignment algorithm was made. The processing results based on the test data validate the accuracy of the alignment models and the feasibility of the method.