摘要
文中对影响寻北仪中陀螺和加速度计精度的误差进行了分析,并且提出了应用信息平方根滤波进行数据处理的方法,从而解决了传统的用卡尔曼滤波方法必须保证P正定性、否则会在迭代计算时发散的问题。并用试验结果证明,信息平方根滤波可以提高寻北仪的精度,达到寻北精度的要求。
This paper analyzes errors of gyro and accelerator in northfinder and presents a method of dealing with datas-Information Square Root Filter. It avoids destroying the positive definiteness essential to a covariance matrix and lead to the unstability of numerical calculation in Kalman filter(KF). The result of test proves that information square root filter can improve accuracy of Northfinder andsatisfies demand of northfinder's accuracy.
出处
《弹箭与制导学报》
CSCD
北大核心
2004年第S7期205-206,211,共3页
Journal of Projectiles,Rockets,Missiles and Guidance
关键词
信息平方根滤波
信息滤波
寻北仪
information square root filter
information filter
northfinder
