Visualization Simulation Of NLOS External Trajectory

Since always, in traditional demos of projectile flight trajectory, projectile impact point mostly is calculated based on the motion law of the projectile during a flight of each hour, obtaining the numerical simulation of trajectory, so as to draw a ballistic trajectory in two- dimensional or three-dimensional space. The numerical simulation is not only intuitionistic, but limits the control of projectile in real time, has less accord with the research needs of modern weapons and equipment. With the development of computer technology and application of virtual reality for further research, the virtual reality visualization technology can be introduced into real-time simulation of the projectile, and to achieve interactive operation in visualization simulation, therefore the simulation could be more realistic.Firstly, this paper takes a certain type of grenade as a research object, sets up a relevant reference frame, analyses the force and moment on the projectile, the sports equation with 6 DOF is derived by theorem of the centroid motion and moment of momentum theorem.Secondly, trajectory model of the centroid is established based on MATLBE/Simulink, complex module is packed into subsystem. Through simulation, getting the ballistic curve and the attitude angles, which are consistent with the actual situation, thus verifying the accuracy of the simulation model.Thirdly, the virtual reality scene is built,the projectile model and the flight environment are established by the virtual reality language VRML builder V-Rream Builder2.0, making up of a realistic virtual scene.Finally, simulation model is connected with virtual reality scene through Simulink interface technology, operating the model, projectile flight attitude and the forces from different angles in the whole process are vividly demonstrated, so as to achieve visualization simulation of NLOS external trajectory.