Analysis of Sliding Mode Stability in Variable Structure Guidance Under Restrained Overload

The stability region of sliding mode in variable structure guidance design method is analyzed and determined based on reaching conditions,considering the restrained overload problem of missile control.The guidance system is built according to the relative relationship in three dimensions.For longitudinal plane,by introducing the subsidiary smooth function,the attraction domain of sliding mode are analyzed and determined,and the stability of the guidance system is proven,considering from the coupling relations of two planes in three dimensions.Finally the attraction domain of a kind of variable structure guidance,which is designed by zeroing sight angle rate,is shown that the valid of the analysis method is verified.