Study Of Adaptive Terminal Guidance For Lifting Reentry Vehicle With Angular Constraint

Lifting reentry vehicle is a focus of the major military country, it is the step tothe space, it has important value for a country.This paper analyzes the characteristic of the lifting reentry vehicle, themathematical theory model of lifting reentry vehicle is established without thethrust. The coverage of the lifting reentry vehicle is mentioned at first and provideservices to terminal guidance. Coverage of lift entry vehicle is studied in this paper,coverage of lift entry vehicle defines the potential reachable landing locations,which can help vehicle choose or change the landing location in normal flight andemergency accident. The reachable landing locations are an important guarantee ofsafety flight and have a very important significance. In this paper, reachable landinglocations generation problem is transformed into trajectory optimization ofmaximum downrange, minimum downrange, maximum crossrange and maximumcrossrange at specified downrange under entry constraints. The SQP method is usedto solve the trajectory optimization problem. Finally numerical simulations areperformed. The simulation results show that the technology of reachable landinglocations generation for lift entry vehicle proposed in this paper is reasonable andfeasible, and the result is given in Chapter III.Coverage of lifting reentry vehicle provides services to terminal guidance. Thereentry corridor also can be deduced through the target position.To ensure the attract better, the angle of attacking is constrainted. In this paperadaptive terminal guidance with angle constraint is studied. The lifting reentryvehicle attack the target with angle constraint by updating the command ofbank-angle/angle-of-attack.Finally, assuming the target is fixed, numerical simulations about the terminalguidance with angle constraint are performed. The simulation results meet therequirements of the end conditions, so the guidance is effective.