Dynamics Analysis And Attack-defense Confrontation Simulation Of Hypersonic Vehicle

In this paper,a hypersonic vehicle in the form of a wing-body assembly is taken as a specific object,and its trajectory optimization and offensive and defensive confrontation during its reentry process are studied.The paper mainly includes the following aspects:First introduce the dynamic model and fluid motion model of the hypersonic vehicle when it reenters the atmosphere.Regard it as a mass point,determine the position of the aircraft in the geocentric equatorial rotating coordinate system,use Newton’s law of kinematics to establish the vector equation of force and velocity,and then decompose it in different coordinate systems to obtain the scalar equation;ignore the earth’s rotation and Coriolis The influence of the force,the dynamic model of the center of mass in the Soviet coordinate system is derived.The most important flight trajectories and system constraints of the aircraft are introduced,and the flow control equations are established to provide a theoretical basis for computational aerodynamics numerical simulation.Analyze the characteristics of the reentry gliding section of the hypersonic vehicle,and perform aerodynamic simulation on the reentry gliding section based on Fluent,and obtain the relevant aerodynamic parameters.The univariate aerodynamic coefficient model and the two-variable aerodynamic coefficient model were established respectively,and they were used in subsequent simulation experiments.The basic framework of the Gauss pseudospectral method to transform the multiinterval continuous dynamic trajectory optimization problem into a nonlinear programming problem is introduced.Using the GPOPS toolbox,consider the impact of different initial reentry track angles and Mach numbers on the flight distance of the hypersonic vehicle reentry.The mechanism of the interception of hypersonic weapons and the influencing factors of offensive and defensive confrontation are analyzed.Then perform simulations from the perspectives of hypersonic weapon attack and interceptor interception,quantitatively analyze and evaluate the attack ability of hypersonic vehicle weapons against anti-missile interception systems,and verify the attack effectiveness under different lateral maneuverability;from the perspective of interceptor terminal guidance Set off,design interception simulation scenarios,and conduct Monte Carlo simulation to draw corresponding conclusions.