Trajectory Optimization and Analysis for Intercontinental Boost-Glide Missile

To obtain the optimal trajectory for intercontinental boost-glide missile,the trajectory was divided into three phases by flight states.A feasible and novel trajectory was proposed.The dynamic model,the propulsion model,the aerodynamic model and the aerothermodynamic model were built.With the constraints of stage separation,transonic phase,control,dynamic pressure,normal overload,anti-defense,heating rate and wall temperature at stagnation point of nose tip for warhead,the trajectory optimization models of boost and glide phases were established,i.e.,multi-constraints multi-phase trajectory optimization model.By direct shooting method,the associated optimization problem was converted into a nonlinear programming problem,which was solved through a sequential quadratic programming solver.The numerical results of the trajectory optimization were compared among three cases.Results show that boost-glide-skip trajectory is more suitable for intercontinental boost-glide missile with sharp-nose glide-warhead.