激光光斑抖动对激光半主动制导精度的影响

以正弦抖动激光光斑作为制导系统的跟踪目标,分析了稳瞄系统不同抖动频率的照射光斑对制导精度的影响.通过理论研究并结合脱靶量峰值分析法和影响因子分析法的仿真结果,给出了稳瞄系统照射精度的评定标准.研究结果表明,制导系统由于光斑抖动带来的脱靶量在一定范围内将大于光斑本身的振幅.同时发现造成大脱靶量的两个主要因素是激光照射光斑的抖动频率和制导系统的时间常数.因此在实际设计中,应匹配具体制导系统的时间常数和稳瞄系统的频带,以避免产生较大脱靶量.

Fluence of Laser Spot Random Flutter on the Precision of Laser Semiactive Guidance

Sine flutter laser spot was adopted as the pursued target by the guidance system.The influence of target acquisition and designation sight(TADS) frequency laser spot on the guidance precision was analyzed.Through theoretical research combined with simulation results of peak miss distance method and influence factor method gave assessment standards to the precision of TADS.Research results showed that due to laser spot flutter,in some frequency areas the miss distance is greater than the magnitude of the laser spot itself.Simultaneously,the research also showed that the two main reasons causing serious miss distance are the laser spot flutter frequency and guidance system time constant.So in actual design,guidance system time constant should match the TADS frequency bandwidth to avoid large miss distance.