Design of Guided Air Ammunition's Fuzzy Variable Structure Guidance Law

The air ammunition can be used to attack large still targets. The position and velocity message transmitted by the SINS/GPS integrated navigation system is transformed into other coordinates, and the mathematical description of target-missile relative motion is built according to the transformed message. Fuzzy logic rules are introduced to adjust approaching law adaptively, and the guidance is designed by applying variable structure control theory. The simulation showed that this guidance law has better precision under all kinds of disturbing.