Preliminary And Trajectory Optimization Designing Of Rocket Carrying And Launching UAV

Rocket carrying and launching UAV is to fold the UAV into the rocket and use the rocket to send the UVA into the air.This way can make up for the shortcomings of complicatedly use and maintenance,narrow scope application,poor layout flexibility,obvious aim of UVA,and this way has a broad application prospect.In this paper,the rocket aboard UAV system and kinematics and dynamics of the process of rocket's launch are studied:(1)This paper presents a preliminary design of a high aspect ratio UAV,according to its design features and design requirements,make a conceptual design include the general layout,main parameters,folding type,mission planning and performance evaluation.(2)The flight process of the rocket carrying and launching UAV is divided into stages,and the dynamic equations are provided.These equations are simplified by normalized treatment.Using the Lie series numerical solution to solve differential equations,and compares it with the traditional Runge-Kutta method,showing the Lie series method is relatively simple.(3)The design parameters of rocket design is from the results of UAV design.Based on the design method of the traditional launch rocket,the concept design of the launch vehicle is presented.On this basis,the multi Island genetic algorithm is used to optimize the trajectory.(4)Analysis the launch energy variation of rocket carrying and launching UAV trajectory,through the comparison of Fermat's principle in optics,proposing a trajectory optimization method to find the minimum energy consumption path.Compared with the traditional trajectory optimization design method.The work of this paper has certain engineering practicability,and has certain reference value to the design and research of the rocket carrying and launching UAV.