基于比对的捷联惯性测量组合不拆弹标定方法

SIMU Error Calibrating without Stripping the Missile Based on Comparison Method

安装在导弹中的捷联惯性测量组合(简称SIMU)随着时间推移陀螺和加速度计误差参数会发生变化,从而导致性能降低。针对拆弹标定工作量大、成本高的问题,提出一种工程上简单实用的不拆弹状态下对捷联惯性测量组合进行误差标定的方法。该方法将高精度捷联惯性导航系统固连在待标定弹上,作为基准,采用类似传递对准的方法,利用大维数卡尔曼滤波对陀螺和加速度计的各项误差进行估计。试验结果表明:该方法能够使SIMU的精度提高到陀螺误差小于6.0(°)/h,加速度计误差小于1 000μg,具有较高的工程实用价值。

The gyro and accelerometer＇s error parameters of SIMU embedded in missiles will change with time history,which will cause performance decreasing of the missiles.The prensent calibration of SIMU is to stripping the missile,and it is of heavy work and high cost.Aiming at this problem,a method of calibrating SIMU without removing it from the missile was put forward.This method chose a SINS of high precision as reference frame which was similar to the transfer alignment to calibrate all error parameters by large dimension Kalman filtering.Testing result indicated that the method could improve the precision of gyro up to less than 6.0,and that of accelerometer up to less than 1 000.The method was high worthy of engineering application.