A study on the multiple-phrase reentry guidance method of hypersonic vehicle

For the reentry of common aero vehicles(CAV),a rapid trajectory planning method for a long range hypersonic glide reentry vehicle is presented.The reentry trajectory is divided into three phases: initial descent phase,transition phase and quasi-equilibrium glide phase which takes most of the reentry period.By using the QEGC,the bank angle profile is modified so that it can satisfy all path constraints.With the predictor-corrector method combined,this method generates the basic reentry guidance law for CAV considering all path constraints.The results indicate that the method can quickly get the trajectory required by process constraints and target.