A hybrid proportional navigation based two-stage impact time control guidance law

To improve applicability and adaptability of the impact time control guidance (ITCG) in practical engineering, a two-stage ITCG law with simple but effective structure is proposed based on hybrid proportional navigation, namely, pure-proportional-navigation retro-proportional-navigation. For case error less than zero, first stage guided trajectory driven by retro-proportional-navigation second one pure-proportional-navigation. When greater both stages are generated using different navigation gains. It demonstrated two-and three-dimensional numerical simulations that at least has comparable results to existing proportional-navigation-based laws shown be advant-ageous certain circumstances alleviates its dependence time-to-go estimation, consumes energy, adapts itself more boundary conditions constraints. The this research expected supplementary current literature.