Research Of Rapid Trajectory Planning For Hypersonic Glide Vehicle

Launched with the boosting rocket and released at a certain altitude, the hypersonicglide vehicle makes a long-duration and long-distance gliding flight with the help of theaerodynamic force. Combing the advantages of traditional ballistic missile and cruisemissile, the hypersonic glide vehicle is characterized by fast speed, high altitude, longvoyage and flexible maneuverability, thus becoming the research hotspot in missions ofremote and fast access and strategic strikes, and enjoying broad application prospect inmilitary and civil fields.As a key technology, trajectory planning is closely related to structural design,aerodynamic design and guidance control of hypersonic glide vehicle. Its trajectory ismost typically represented by the gliding flight. Trajectory fast planning with multiplecomplex constraints is a key problem to be solved. Against the backdrop of remoteprecision strike missions, this paper aims at realizing fast trajectory planning ofhypersonic glide vehicle, investigates trajectory planning model, algorithms andmission-specific strategies of the hypersonic glide vehicle, and reaches someconclusions.Firstly, studies are conducted on multi-constrained trajectory planning modelingduring the glide phase.1. Based on previous domestic and foreign frontier research, anin-depth analysis of the flight trajectory characteristics in the atmosphere is carried out,and3DOF motion model during the glide phase in the geocentric coordinates system isbuilt.2. Fully considering various complex constraints and aiming at specific missions,different kinds of optimization objectives are analyzed, and the trajectory planningmodel during the glide phase is set up, laying a solid foundation for future trajectoryplanning studies.Secondly, considering that the pseudospectral method has higher accuracy withfew parameters, Gauss Pseudospectral Method is adopted for hepersonic glide vehicletrajectory rapid planning during glide phase based on trajectory planning model withmulti-constraints.1. By time domain transformation and approximate expression, theoptimal control problem is transformed into the nonlinear programming problem.Furthermore, error vector and path constraints are calculated to derive the principle ofsegmentation and allocation point increase.2. Aiming at remote and fast strikesmissions, equilibrium glide and skip simulations are executed respectively, verifying theeffectiveness and rapidity of Gauss Pseudospectral Method in solving the trajectoryplanning problem.Finally, based on the trajectory generated by the Gauss Pseudospectral Method,on-line trajectory generation process is studied against the emergency of destinationchange.1. For higher efficiency of on-line calculation, simplifying and dimentionless procedures are executed on the3DOF motion model.2. IDVD method is introduced toderive the steps in solving the trajectory planning problem.3. Considering the accurateboundary conditions on-line trajectory needed in by the IDVD method, a solvingstrategy is put forward to deal with the mission of destination change.4. A comparativestudy is conducted on the simulation of Gauss Pseudospectral Method and IDVDmethod for the same destination change mission, proving the feasibility of IDVD inon-line short voyage trajectory planning.In summary, this paper systematically investigates trajectory planning problem ofthe hypersonic glide vehicle, puts forward the strategies of rapid and on-line planning,and explores new approaches in trajectory planning. The work in this paper is abeneficial complement to the existing trajectory planning technology, serving as a readyreference for the hypersonic glide vehicle development our country in the future.