晃动基座下的双位置参数辨识精对准仿真研究

A Study of Double-position Parameter Identification Alignment on Oscillating Base

捷联惯导在实际对准过程中,经常会受到载体晃动的影响而导致对准结果变差,进而影响到惯导系统的导航精度。采用双位置参数辨识精对准方法利用陀螺输出建立的数学平台对载体的晃动进行隔离,实现了载体在晃动基座下的对准,并通过对陀螺等效东向漂移的估计进一步提高了对准精度。方法的基本原理做了详细介绍,并针对晃动基座这一特定环境进行了仿真研究。仿真结果表明在晃动基座条件下仍能够达到较高的对准精度,具有一定的工程应用价值。

During the initial alignment, SINS is often affected by the oscillation of the base, moreover, the precision of navigation is rough. By using the output of gyros, double position parameter indentification alignment establishs a mathematical platform, which can isolate the outer interference. And this method also can estimate the east drift of the gyro to improve the alignment result. Under that condition, the simulation of an oscillating base has been done, and the result shows that the method can reach a high - precision alignment. It is a promising method in practical engineering.