ENDGAME Guidance Law of Air-to-air Missile

For the ENDGAME section of air-to-air missiles,it is very important to select an appropriate guidance law for missile to hit targets accurately.This paper analyzes three different guidance laws,that is,the proportional guidance law,the differential game guidance law and the variable structure guidance law.The direct force control is introduced,and then the performance of three different guidance laws under various attack conditions is analyzed by the computer simulation.It is shown that under the engaged condition,the variable structure and the differential game guidance laws are better than the proportional navigation law.For a large motor and sustained high speed targets,the guidance performance will be better with the direct force control.