For Anti-jamming Performance Evaluation Of Infrared Imaging System Infrared Image Simulation

Infrared imaging seeker can provide much information about the target and the background, which helps to settle the problems of the automatic targets recognition (ATR) at long distance and of aiming at fatal parts within short distance. And for that advantage the IR imaging guidance missiles play an important role in the wars. The IR counter-counter-measurement ability is an important factor of the seekers' performances. When a missile is finalized, the IRCCM ability must be assessed. The general method is to fire some missiles in the shooting range and acquire test data. This method involves much work and cost much. On the other hand the experiments are liable to the environment and the climate etc. This leads to that the IRCCM ability of the missiles can't be fully tested through these experiments. This paper is concerned about the method of the assessing the IRCCM ability of IR imaging guidance missiles, which includes both a set of criteria and the hierarchy of the assessments and arranges the data acquisition in the experiments for the assessments.The assessment experiment involves the target, background and the IR flares. The IR image of the target, background and the IR flares is called IR signal for the IR seeker. Nowadays the technologies of the computer science are booming and the prices of the hardware decrease much, by using Computer Generated Imagery technique it becomes available to output IR images that can't be available in shooting range. It also can save many outlays for the experiment and instruments. The IR images generated can be used as the input signal to the simulation system for the purpose of testing the IRCCM and tracking abilities of the missiles.In this paper, firstly, three-dimensional geometrical models of the target and IR flares are established and by using the software VEGA missile attacking process is real-time simulated visually.Secondly, The IR radiation characteristic of the target, background and the IR flares are analyzed, in which the wave radiation of the sun at different time, wind speed, the relative humidity and IR radiation attenuation characteristic of the atmosphere is under consideration. From above the IR image of the target, IR flare and the background are got and then are normalized to gray color image that will be showed in a child window in real time. And what's more, considering the dynamics and kinematics equation of the target and the missile, dynamic IR images can be obtained.The works mentioned above has a great value in engineering practice. It helps the designers to increase the IRCCM abilities of the missile.