飞行器运动控制建模及红外辐射图像仿真

Simulation of Air Vehicle Motion Control Models and Infrared Images

实时生成飞行器在飞行过程中的红外图像对于研究飞行器的红外特性具有重要意义。飞行器在飞行过程中,由于其飞行速度、高度、姿态等参数变化性较大,且机体本身容易受到环境、背景等辐射的影响,因此较难准确地仿真机体的温度场分布。由于飞行器机体温度场分布与飞机的运动状态密切相关,因此文中首先建立了决定其姿态和速度的控制模型,并对飞行器面源热平衡方程进行建模研究。然后,应用CFD(Computational Fluid Dynamics)对飞行器的绝热壁温度场进行求解,并给出了机体绝热壁温度的高度简化算法。最后仿真了不同飞行器在不同波段、不同高度、不同速度下的红外图像。

The generation of infrared(IR)images of air vehicles in real time during flight is very important for research on the IR characteristics of air vehicles.The velocity,altitude,and attitude of air vehicles vary during flight.Moreover,the air vehicle body is affected by environmental and background radiation.Hence,it is very difficult to obtain an accurate temperature distribution of the air vehicle body.Because the temperature distribution is related to the state of motion,control models that determine the attitude and velocity are established,along with the surface heat balance equations.The adiabatic wall temperature distribution is solved by computational fluid dynamics,and simplified altitude algorithms are obtained.Finally,IR images of the air vehicle in different bands and at different altitudes and velocities are simulated.