Damage Probability Analysis Of Ranging Projectile To Unmanned Aerial Vehicle

In recent years,the frequency and role of UAVs in wars around the world are increasing;at the same time,with the development of UAV technology,"low,small and slow"UAV has the characteristics of simple operation,easy to carry,low price,strong concealment and so on,which makes it become a UAV Many people with ulterior motives or the weapons preferred by terrorist attackers pose severe challenges to the security of large venues and the protection of key targets,as well as threats to national security.In order to deal with the threat of"low,small and slow"UAV in the military field and anti-terrorism field,the anti UAV technology that uses the short-range and high-speed air defense weapon system to launch the ranging projectile and form the natural fragments by air blast to hard damage UAV is proposed,so as to improve the damage efficiency of UAV.In order to obtain the point of contact,velocity and angle of contact,this paper compares and analyzes the calculation accuracy of Runge Kutta method and Maclaurin series analytical method in solving the exterior ballistic datas.The results show that Maclaurin series analytical method has a high calculation accuracy in solving the flight parameters of the projectile,the maximum error is 6%,and the Maclaurin series method is used to solve the problem The ballistic datas such as the coordinates of each advance point of the target,the angle of fall of the projectile,the velocity of fall of the projectile and flight time are obtained.In order to solve the aerodynamic parameters needed in ballistic calculation,the paper uses CFD software to simulate the aerodynamic parameters of the ranging projectile at different Mach numbers(Ma=0.8-3.0),different attack angles(?=0~?-9~?),and different rotating speeds(0-80000r/min),and summarizes the changing rules of the aerodynamic parameters with the rotating speed,Mach number and attack angle.In order to consider the dynamic dispersion characteristics of fragments,this paper analyzes and calculates the initial velocity of fragments,the spatial distribution law of fragment dispersion angle and fragment mass of the ranging projectile in the state of static explosion.The dynamic dispersion angle and dynamic velocity of fragments need to consider the falling velocity of the projectile at the advance point of the target.The calculation model of the damage probability is used to calculate the probability of the target's damage to the UAV at different flight speeds and weapons at different firing speeds and different firing lengths,in the same route,which provides a reference for the formulation of the shooting scheme of the weapon system.At the same time,the change curve of the firing angle and direction angle of the weapon with the strike time can provide a reference for the design of the follow-up system.