摘要
近年来红外成像导引头发展迅猛,红外成像制导引信一体化技术在空空导弹上的应用也成为研究的热点。但是,按被动方式工作的红外成像探测器不能直接提供目标的距离,限制了引战配合效率的提高,因此,必须对弹目距离做出较准确的估算。通过分析红外辐射传输过程,定量计算了云团对红外辐射衰减的影响,指出了基于红外图像灰度进行被动测距的使用条件;针对红外图像中目标面积相对于特征线度容易提取的特点,提出了一种基于面积的被动测距算法,根据面积变化关系估算距离并预测接近速度,当面积突变使估算距离不可信时,由上次接近速度预测值进行距离估算。仿真结果表明:可信度概念的引入,能有效避免目标转向机动时带来的测距误差,提高测距精度。
In recent years, with the rapid development of IR imaging seeker, the application of IR imaging guiding integrated guzing technology in air-to-air missile has been a hot research topic. However, IR imaging detector working in passive mode can＇t offer the missile-target distance directly,and limits improving of efficiency of fuze warhead matching. Therefore, it is necessary to estimate the distance between missile and target accurately.Through analyzing the IR radiant transmiting process, and the influence of cloud attenuation on IR radiation was computed quantitatively, the application condition of passive ranging based on IR imaging gray was put forward.Compared with character size, target area could be easily picked up from IR images, a passive ranging algorithm based on area was given. Missiletarget distance and approaching velocity were estimated in the algorithm according to the change of area. When the distance was unreliable due to abrupt area changing, the last approaching velocity value was used to estimate the current distance. Simulational results show that ranging error caused by target turning maneuver can be avoided effectively and the ranging accuracy will be improved sequentiallythrough introducing reliability into the algorithm.
出处
《红外与激光工程》
EI
CSCD
北大核心
2009年第3期391-396,共6页
Infrared and Laser Engineering
基金
航空科学基金资助项目(20080818007)
关键词
红外成像
空空导弹
被动测距
消光系数
面积测距
IR imaging
Air-to-air missile
Passive ranging
Extinction coefficient
Ranging by area
