Abstract:

A rapid planning method for high reliable reentry trajectory is proposed. In the process of generating the reference trajectory, the premise of applying the quasiequilibrium glide condition (QEGC) does not hold if the rate of the path angle is not small enough. The bank angle profile based on the QEGC will be nonconservative, and then the generated reentry trajectory might be at risk of crossing the reentry corridor. With the goal of high reliability, the reentry reference trajectory should satisfy path constraints and terminal constraints during the process of searching the bank angle. Meanwhile, the premise of the QEGC that both the path angle and its rate are small quantities is also considered as a constraint on the bank angle. The simulation results demonstrate that the proposed method can guarantee the reliability of reference trajectory with preservation of the adaptability and rapidity.