Guidance Algorithm for Reentry Vehicle Considering Target Maneuvering and No-fly Zone Constraints

The adaptability of the mid-terminal guidance handover window of the reentry vehicle is insufficient when the target is maneuvering quickly. This paper proposes a reentry vehicle guidance algorithm considers the target maneuver and the no-fly zone constraints. An iterative algorithm estimating the handover position and reentry flight time is presented to obtain a more suitable handover window relative motion state, which can reduce the impact caused by target maneuvering. No-fly zone constraints are considered in the trajectory optimization process to obtain a reentry reference trajectory. LQR controller is used to track the nominal trajectory and a reentry guidance scheme is designed to complete the reentry mission. Simulation results show that this method can control the aircraft to enter the mid-terminal guidance handover window when the target is maneuvering quickly and there are no-fly zones, and it has strong adaptability.