横程动态约束的预测-校正再入制导方法

For the reentry glide guidance of high lift-to-drag ratio vehicles, a lateral guidance strategy with crossrange dynamic constraints is proposed based on predictor-corrector guidance. By using the approximate linear relationship between crossrange and range-to-go in the reentry process, a crossrange corridor with dynamic boundary constraint is designed to control the bank angle reversals. The disturbance of atmospheric density and aerodynamic parameters which causes the uncertainty of predictor model is estimated online. The CAV-L, a kind of hypersonic vehicle, is used as the research object to carry out the reentry guidance simulation. The results show that the guidance method can accurately guide a vehicle to a target for reentry mission with different ranges, the distribution of bank reversal occasion is appropriate, and the reversals are fewer. The Monte Carlo simulations verify that the crossrange-dynamic-constraint guidance has good adaptability and robustness to the initial reentry errors and process disturbances.