Trajectory Design And Optimization Of Long-range Rocket

Long-range rockets are an important category of equipment possessed by Army artillery.They mainly include combat equipment such as rockets and rocket launcher,information equipment such as reconnaissance and commanding,and support equipment such as loading and transportation.They can be adapted to all-terrain and all-weather operations,and are mainly used for combat tasks such as repression,small-scale suppression,and fire assault.Among them,the rocket directly reflects the performance and power of the long-range rocket weapon system,is the core of the long-range rocket weapon system,and is also the main research object of domestic and foreign scholars.The ballistic design and optimization of rockets are researched in this thesis,and the specific research contents are as follows:Firstly,a rigid 6DOF motion model of a long-range rocket is established based on the earth ellipsoidal model;A thrust eccentric model is established,and the influence of thrust eccentricity on the rocket trajectory is analyzed;Based on rocket aerodynamic data,the lift-drag ratio,static stability,rudder maneuvering efficiency of the rocket are analyzed.Secondly,the trajectory scheme that can meet the constraints of range,maximum flight altitude,final speed,and falling angle is designed,and the attitude,angle of attack,and overload control system of the rocket are designed.On these basis,full trajectory simulations with/without thrust eccentricity were performed respectively,which verified the effectiveness of the trajectory scheme and the accuracy and robustness of the control system.Then,considering the starting and ending moments of the gliding section,the gliding angle of attack,and the decreasing amount of the terminal pitch angle as design variables,the multi-objective optimization model of long-range rocket is established,based on the range falling angle and final velocity.The optimization model is solved using the Elitist Non-Dominated Sorting Genetic Algorithm,and the trajectory parameters to get the largest range,the largest falling angle,and the largest final velocity are obtained.Finally,aiming at the cooperative combat problem of multi-rocket,a cooperative scheme based on different launch points is proposed,which transforms the cooperative attack problem to the optimization problem of rocket launch points.An optimization model of the rocket launch point under the expected attack time of the rocket is established,and the cultural algorithm is used to solve the model.Then,the distributions of the rocket launch points under different attack times are obtained.The quadratic polynomial is used to fit the launching points under different attack times and emission point distribution curves are got.The Monte Carlo test is used to verify the fitting accuracy.For cooperative warfare,four kinds of cooperative strategies are proposed and verified by simulation.