水面舰船目标的实时红外成像仿真

Real-time IR imaging simulation of the surface warship

基于OSG对海天背景下的舰船目标进行了红外成像仿真。根据红外物理和热传学知识,采用角系数法建立了舰船目标的红外物理模型,从而计算出舰船表面温度场和辐射场的分布。参考导弹的飞行模式,采用三阶非线性指数拟合算法得到了弹目距离与透过率的数学关系模型。最后采用着色器技术实现导弹飞向目标过程中,导引头视景中舰船灰度的实时渲染和变化效果。仿真实验表明,舰船的红外仿真效果较好,模拟导弹末端飞行过程时,舰船灰度变化趋势与实际情况一致,仿真结果可信。

The IR imaging simulation of the warship in the background of sea and sky based on OSG is given in this paper.According to the theory of IR physics and heat transfer,the IR physical model of warship was built by angle fac-tor method,and then the temperature field distribution and radiance field distribution of the ship surface were calculat-ed.Refer to missile trajectory,the mathematical model of the distance between missile and target and the transmittance were obtained by the third order nonlinear exponential fitting algorithm.At last,real time rendering and the gradual change of ship surface grayscale in IR seeker view was done by the shader technology during the missile flies to the target.The simulation experiments show that the simulation effect is better.The change of ship surface grayscale is consistent with real situation when simulating terminal flying of the missile,and the result of simulation is credible.