Optimal linear quadratic guidance law with terminal impact angle constraint

Traditional guidance methods ensure simple algorithm and precision, however, they may create a lower impact angle. In recent years there has been an increasing interest in guidance law in order to improve the impact angle. This paper proposes an optimal guidance law under the constraints of miss distance and impact angle. The approach adopted extensively is called linear quadratic optimal control theory. Simulation results indicate that the damage ability can be increased significantly compared with the proportional navigation law, which improves the performance of modern guided weapons enormously.