某型导弹导引头定向扫描技术

Research on Beamed Scan Technology for A Missile Seeker

针对某型导弹导引头瞬时视场角较小的缺点,提出了定向扫描技术。对S形、Z形和分行螺旋式3种扫描图形进行了对比研究,在综合分析扫描周期和发现概率的基础上,选取了分行螺旋式扫描作为导引头的定向扫描方式;建立了角度预定回路的数学模型,并设计了模糊PID双模控制器;对角度预定回路的控制方法进行了仿真分析,并建立了导引头模糊PID双模控制的数学模型。模型仿真结果表明:模糊PID双模控制器具有超调量小、稳态精度高、响应时间短的优点,满足了系统要求,实现了导引头的定向扫描控制。

A beamed scan technology is proposed for small IFOV of a missile seeker.Three typical scan graphics of S figure,Z figure and line-by-line helix scan are researched in a contrast way.Based on the synthetic analysis of scan period and detection probability,line-by-line helix scan is chosen as the beamed scan mode.A mathematical model of angle-scheduled loop is established and a dual-module fuzzy PID controller is designed.The angle-scheduled loop is simulated to effectively control the seeker.A mathematic model of dual-model controller of Fuzzy-PID is established.Finally,when target-indicating angle is at 1°,system simulation is conducted with step input.The results show that the dual-module fuzzy PID controller has the advantage of small over shoot,high static accuracy and short response time,which meet the requirements of the system and realize beamed scan control.