Helicopter Aircraft Gun Weapon System Effectiveness Assessment

Helicopter borne aerial gun has the advantages of high firing speed,good reliability,light weight and flexible adjustment of firing angle.It is an important means for helicopter to perform air to ground attack mission.It is very important to analyze the combat process of helicopter borne aerial gun and calculate the combat effectiveness of weapon system.Based on the effectiveness evaluation of land and aviation active weapons,on the basis of studying the effectiveness evaluation results of weapons and equipment at home and abroad,aiming at the problem that the ballistic performance of weapons is mainly obtained by shooting at ground vertical targets and difficult to obtain when shooting at non ground targets,this paper puts forward the concept of normalized plane.Combined with the vertical target firing data of a weapon,the full airspace ballistic performance of air gun weapon is calculated by simulation;The ballistic performance under non-standard muzzle velocity is calculated according to the difference of projectile charge during aerial gun firing and the difference between projectile muzzle velocity and standard muzzle velocity caused by the change of barrel temperature during continuous firing.Based on the analysis of the scattering characteristics of the impact points under the condition of platform maneuver,combined with the damage tree,the damage models of armored vehicles and armed helicopters are constructed;Numerical simulation is used to calculate the changes of the dispersion characteristics of the impact point of the armed helicopter in hovering,level flight and dive.On this basis,the hit probability of the air gun is calculated,and the changes of the hit probability of the armed helicopter under different maneuver parameters,attack azimuth and route trajectory are studied;The effectiveness evaluation index system is established,and the aircraft gun effectiveness when attacking targets in different directions is calculated combined with ADC effectiveness evaluation model;The target maneuvering model is constructed to calculate the aircraft gun efficiency when the target maneuvers along the straight route,horizontal arc route and snake route with different azimuth and maneuvering parameters.Aiming at the problem that the environmental conditions usually do not meet the artillery standard meteorological conditions when the aircraft gun is fired,the effects of different altitude,cross wind,longitudinal wind and temperature on the dispersion characteristics of the impact point are analyzed,and the hit probability and effectiveness of the aircraft gun are calculated on this basis.