基于三级滤波的民用飞机组合导航融合算法研究

高精度导航系统是民用飞机必备的机载航电设备。针对民用飞机导航传感器冗余配置特点,设计了一种基于三级滤波的组合导航融合算法。首先根据民用飞机传感器配置特点设计三级滤波架构,然后通过第一级卡尔曼滤波器的局部估计、第二级联邦滤波器的全局估计和第三级全局滤波器的最优全局估计,最终实现导航参数的最优全局估计。最后,通过计算机仿真证明该方法具有很好的位置、速度和姿态估计精度,能够满足民用飞机导航系统的高精度测量要求。

A Three Step Filter Based Integrated Navigation Method for Civil Aircraft

The high precision navigation is the essential avionics equipment of civil aircraft. Aiming at redundance navigation system of civil aircraft, an integrated navigation method for civil aircraft based on three filter was described. The principle of this method was introduced. Then the first step Kalman filter was used to implement local estimation, and the second step federate Kalman filter was used to implement whole estimation, and the third step whole filter was used to implement optimization estimation. Finally, the simulation of this method was finished.A simulation result demonstrated that this method has higher precision of position and velocity and attitude, which can satisfy the requirement of higher precision civil aircraft navigation.