Study Of Reentry Guidanceand Terminal Area Energy Management For Lifting Vehicle

Following the research and development of lifting reentry vehicle, this paper studies on three works: the newly development of reentry vehicles, reentry guidance and terminal area energy management (TAEM) with the purpose of engineering application.According to the development characteristics of the 2nd generation lifting reentry vehicle, this paper does lots of research on the reusable launch vehicle and reentry attack weapons newly developed by some military space powers. Also this paper points out the development trend and key technologies for the future lifting reentry vehicles.In order to research the reentry flight of the lifting reentry vehicle, the reentry dynamical and kinematical model is established, considering the earth rotation and flattening. On this basis, a glide reentry corridor for lifting reentry vehicle is computed refer to the space shuttle and capsules'flight contains of stagnation point thermal Flow, normal acceleration, dynamic pressure and control etc.This paper surveys kinds of reentry guidance algorithms, especially the space shuttle guidance, in order to get the useful reentry guidance. Considering the shortage of space shuttle guidance, the main improvement of newly reentry guidance is the on-board trajectory planning. This technology can improve the security and flexibility of vehicle's reentry flight. This paper uses the on-board trajectory planning algorithm of evolved acceleration guidance logic for entry (EAGLE), and uses the shuttle's trajectory tracking algorithm to make a simulation validation. Results show that the guidance is useful.TAEM is the key phase for the lifting reentry landing on the runway accurately. Based on the space shuttle's trajectory planning and guidance of TAEM, the trajectory planning is transformed into a four geometry parameters'trajectory optimization problem. An optimal trajectory is obtained by a trajectory optimization method with proper performance index. Then, the trajectory is tracked by the designed guidance tracking algorithm. The simulation results show that the TAEM guidance logic is effective and accurate.