摘要
惯性导航系统工作时的导航误差主要来自加速度传感器的安装误差和加速度传感器的横轴灵敏度所造成的测量误差,使得测量精度下降,针对这一问题,提出了基于卫星定位的轴向加速度标定方法。该方法利用了轴向加速度的测量误差与转速的平方成线性的关系,基于卫星定位弹道测量数据,结合外弹道模型,采用卡尔曼滤波动态标定方法实现弹丸轴向加速度的精确测量。仿真结果表明:该方法大幅度地提高了轴向加速度的测量精度,可以有效解决惯导精度低以及卫星定位易受干扰的问题。
The error of inertial navigation system mainly comes from two aspects：the installation error of accel-eration sensor and its sensitivity on the horizontal axis.Therefore,a calibration method of axial acceleration was put forward to solve the problem.Based on the data of ballistic test measured by global positioning system （GPS）and the exterior ballistic model,the method utilized the linear relationship between the measuring error of axial acceleration and the square of rotation rate,and thus the calibration method which adopted Kalman Fil-tering technique achieved accurate measurements of axial acceleration.The stimulation results demonstrated that the measuring accuracy of axial acceleration was significantly improved,and it could effectively prevent the GPS from being disturbed and enhance the precision of inertial navigation system.
出处
《探测与控制学报》
CSCD
北大核心
2014年第2期46-49,共4页
Journal of Detection & Control
关键词
弹道修正
卫星定位
惯性导航
加速度
标定
traj ectory revise
secondary planet orientation
inertia navigation
acceleration
calibration
