Abstract:

In absence of other navigation systems, INS errors of missile formation will cumulate continuously with time. According to the assumption that multiple INS errors of missile formation basically obey Gaussian distributions with zero mean, a novel INS position error cooperative modification method is proposed based on passive observation to a unknown feature target of missile formation. Firstly, the position of unknown feature target is cooperatively located by using LOS angle information and INS position. Then INS localization errors of missile formation are modified based on the estimated feature target position, LOS angle information, LOS angle rate information and INS velocity. Finally simulation results validate that this method is effective.

Key words: Vision aided navigation, INS position error, Cooperative navigation, Missile formation, Unknown feature target