Research On The Simulation System Of Ballistic Trajectory Of Missile Arrows

For the traditional missile launch simulation,we only get the related data and two-dimensional curve problem by trajectory calculation.Taking the 2D trajectory correction projectile as an example,we first do the dynamic modeling and compound guidance research of the two-dimensional correction projectile.Then construct the fire simulation platform software digital map and simulation platform based on 3D scene database,study and solve the key technologies and difficulties in dynamic simulation,establishes a dynamic visual simulation system,development of artillery and missile weapons training,combat simulation,and security tasks have greater the stereotypes meaning and function.The specific work is as follows:(1)According to the flight characteristics of 2D trajectory correction projectile are introduced,and the relationship between the transformation of coordinates used,two dimensional analysis of correction projectile in the corresponding coordinates of the force and torque characteristics and expression,equation of moment of momentum rotation around the heart in the trajectory correction projectile based on two-dimensional coordinates of the centroid motion and the axis coordinate system,described rigid motion equations of two-dimensional correction projectile.And the Fluent software is used to carry out the flow field simulation and calculation,and obtain the relevant aerodynamic parameters,which provide basic data for the next trajectory simulation,scheme trajectory design and guidance research.(2)In order to solve the practical problems in the correction of interference,different angle of the 2D trajectory correction projectile,respectively in different angle in the case of no control of its ballistic flight simulation,according to simulation analysis of two-dimensional trajectory correction projectile base,this chapter proposed a prediction guidance method using velocity correction method and the landing at 10s and at the apex of the two-dimensional respectively and angle of the trajectory correction projectile is modified,the simulation results show that the two guidance methods when regardless of the correction,can satisfy the requirements of the two angle under the impact precision according to the characteristics of two kinds of guidance method,proposed in ascending arc the direction of the velocity correction guidance method,composite guidance method guided arc reduction method uses placement prediction,and the results show that the composite guidance in different fire angle The method can be used to correct the trajectory of the two-dimensional modified perturbation.(3)Acquisition of digital map database,using the Gauss algorithm field shooting UTM coordinates and longitude coordinate conversion,and firing emplacements,placement,destination information displayed in the digital map,drawing digital map under the flight path and gun target deviation information,combined with the database to build the missile firing simulation the platform combined with the digital map.Resolved before field shooting in different regions of the technical personnel only according to ballistic parameters calculation approximate estimates of the landing point,the simulation results of shooting local actual terrain directly cannot combine the problem,provide a good reference for before shooting and foreign arms sales presentation.(4)Due to the flight characteristics of guided missiles,we need to display the real attack trajectory and the large area span 3D vision when performing the visual simulation of the projectiles and rockets.At the same time,we need to show the details of projectile flying posture and so on.In order to further improve the effect of the simulation,using Unity3D visual simulation technology,3D modeling,3D panorama creating regional scene,flight simulation and realistic battlefield environment by using particle system,combined with the fire simulation platform database,and can be mainly characterized by playing on the swing operation flight flight attitude details etc.