Research on the flight coverage of near-space hypersonic vehicle

Near-space hypersonic vehicle which is rocket assisted to the apogee then unpowered return, gliding between 70km to 25km for a long distance. The flight coverage of near-space hypersonic vehicle has great value in overall design and control system design. This article will change the fight coverage into the trajectory planning in typical direction. And quasi-equilibrium glide trajectory will be divided into two stages: maneuverability glide phase and straight glide phase. In the first phase, the vehicle rolls in a constant large roll angle, and then rolls in reverse direction under a certain altitude, until the terminal position and heading are coincidence with the reference flight path. In the second phase, the trajectory planning is based on the method of dynamic pressure profiles. The simulation results shows the flight coverage of near-space hypersonic vehicle.