Research On Reentry Guidance Algrithm Of Hypersonic Glide Vehicle

The hypersonic glide-reentry vehicle has a large lift-drag ratio and strong maneuverability to complete long-distance and highly-precise strike mission. Due to the complexity of re-entry environment, the hard constraints and trajectory’s nonlinearity, designing an appropriate guidance law which is accurate and robust is significant. This master thesis focuses on the reentry guidance for the hypersonic glide-reentry vehicle, which includes the researches below:According to the characteristics of the hypersonic glide vehicle reentry process, the dynamics equations for hypersonic glide-reentry vehicle have been obtained. The impact factors during reentry process have been analyzed.The main constraints are modeled. The transformation of the constraints and the corridor borders is analyzed. The design of the flight profile is completed based on the characteristics of the flight corridor.In terms of the guidance problem, I divide it into two parts: longitudinal control and the lateral control. Complete reentry guidance for the hypersonic glide-reentry vehicle using D-V sectional guided tracking method and LQ R tracking method respectively.1. The basic principles of the D-V sectional guided tracking method has been studied. The relevant parameters along the reference trajectory profiles are calculated. D-V sectional guided tracking guidance law is designed. Mathematical simulation verifies the performance of the D-V sectional guided tracking method.2. The basic principles of the LQ R guided tracking method has been studied. I utilize the LQR tracking controller to track the longitudinal reference trajectory and utilize error corridor method to control the lateral trajectory. Mathematical simulation verifies the excel ent performance of the LQR tracking controller.