摘要
针对单天线的GPS与捷联惯性导航组合系统,提出了一种空中对准方案,不同于传统的传递对准方法,仅依靠GPS测量信息进行速度匹配,完成空中初始对准。该方案采用扩展卡尔曼滤波方法解决对准过程中的非线性问题。仿真结果表明该方案的对准精度(1σ)可以达到水平姿态误差0.07,°方位误差0.3°。
A method of in-flight self-alignment is presented for the integrated system of a single antenna GPS with a strapdown inertial navigation system （SINS）. Different from the transfer alignment, it uses the GPS measurements for the velocity matching to achieve the in-flight alignment. To solve nonlinear problems caused by large attitude errors,the extended Kalman filtering （EKF） is used. Simulation result shows that the alignment accuracy was 0. 07 degree for horizon attitude errors, and 0. 3 degree for heading errors.
出处
《航天控制》
CSCD
北大核心
2006年第5期14-17,34,共5页
Aerospace Control
关键词
捷联惯导
GPS测速
空中对准
速度匹配
扩展卡尔曼滤波
SINS GPS velocity measurements In-flight alignment Velocity matching Extended Kalman filtering
