数据融合技术在SINS/CNS/GPS复合制导中的应用

Data Fusion of SINS/CNS/GPS in Application of Missile Guidance System

分析了导弹SINS/CNS/GPS复合制导系统的缺点,设计了一种新的组合制导方案,该方案分三个阶段:SINS导航段、SINS/CNS导航段和SINS/CNS/GPS导航段。在最后导航段采用了联邦滤波器的结构。在发射惯性坐标系下分别建立SINS/CNS和SINS/GPS子系统状态方程和观测方程,分别设计了UKF和KF滤波器,在数据融合前,先通过一致性检验判断GPS的干扰,然后采用信息分配原则进行数据融合。仿真实验表明该方案有较好的效果和适应能力。

The drawbacks of a common SINS/CNS/GPS integrated guidance system were analyzed, and a new SINS/CNS/ GPS integrated guidance method was designed which was divided to three phases： SINS guidance phase, SINS/CNS phase and SINS/CNS/GPS phase. In the third phase, a federal filter was designed, and the state equations and measurement equations of SINS/CNS and SINS/GPS subsystems were accordingly constructed. A UKF and a KF for the two subsystems were designed. Before data fusion, consistency of the two subsystems was checked for judging the disturbance to GPS, and then the data of the subsystems was fused using information distributed principle. Simulation shows the method is efficiency and adaptive.