Research On Trajectory Optimization Of Air-breathing Hypersonic Vehicle

With hypersonic vehicle technology continues to evolve, national scientificinstitutions, in the corresponding scientific fields have been explored for many years.Hypersonic flight technique is to Aerospace Science inevitable trend of development inmilitary applications, the more the focus is all military powers. Hypersonic miss ilestrike militarily to achieve rapid deployment time is short, high precision strike,penetration ability, etc., a new generation of weapon development trends. In order toadapt to a variety of operational needs, people hypersonic vehicle trajectoryoptimization become increasingly demanding.The following main studies:First, on the basis of previous studies attempting to establish the air-breathinghypersonic vehicle longitudinal plane dynamics and kinematics model, combined withdynamic link library model gives second consumption, thrust, aerodynamic force andtorque as well as the Mach number calculation methods, and finally to establish amathematical model of the atmosphere based on analytical models.Second, study the direct shooting method theory, the air-breathing hypersonicvehicle trajectory optimization problem into a parameter optimization problem.Gradient-based sequential quadratic programming algorithm theory has been studied inreal terms, gives its gradient calculation, matrix updates, pena lty function andone-dimensional search, Maratos effect processing method, and its conversion to theapplication direction for solution parameter optimization problem.Finally, the aircraft trajectory optimization algorithm based on the value, summedup the air-breathing hypersonic vehicle trajectory optimization of the general model,according boost, ascent, cruise segment characteristics of subduction segment toestablish the trajectory of each flight phase optimization model. And research in thetrajectory optimization algorithms and air-breathing hypersonic vehicle trajectoryoptimization mathematical model and the model of air-breathing hypersonic vehiclewholly different flight segments and ballistic trajectory optimization and analysis.