Visual Simulation Of A Six-DOF Rigid Bodyballistic Visual Field

In modern warfare,artillery,as the most lethal conventional weapon,has been the main force on the battlefield.In the war time,in order to improve the firing range and precision of artillery projectiles,many ideas and programs were poposed and implemented by the experts from all over the world.However,the projectile's flight velocity is tremendous,with a range which is 20 km minimum,which makes it imposible to observe the flight attitude and flight path of the projectile.With the development of computer graphics technology and the emergence of virtual reality technology,a series of difficulties such as the instantaneity,high risk and irreversibility in the study of projectile external ballistics can be solved by using integrated computer simulations now.To realize the visualization of exterior ballistic six-degree-of-freedom projectile motion,a cross-platform development was carried out by using MATLAB numerical simulation software and Unity Virtual Reality Engine.In the example of some certain high explosive projectile,a mathematical model of six-degree-freedom equations for rigid trajectory was established based on the ground coordinate system,trajectory-fixed coordinate system and first coordinate system of projectile axes,then programmed into MATLAB solver through fourth-order Runge-Kutta algorithm to finnaly get the projectile flight trajectory and attitude change curve.The solver of the projectile's six-degreefreedom equations for rigid trajectory was programmed into C/C++ code and packaged into C/C++ dll dynamic database,then encapsulated into the libarary of Unity 3D,after which the projectile's six-degree-freedom rigid trajectory parameters was delivered to get the projectile's 3D model flight velocity and attitude,and a visable VR system of projectile's six-degree-freedom rigid trajectory was created later in the environment of Unity to finally provide the reserchers of artilleries and cartridges a 3D visiable interacting system.In the end,the creating method of this system is summarized and the existing problems of the system are analyzed to get the improving scheme.A bold hypothesis is also brought out to give a direction for future research.