摘要
针对红外导引头瞬时视场较小的缺点,提出了分行螺旋式定向扫描技术。通过分析扫描周期、发现概率、重叠系数3个技术指标,确定了红外导引头的搜索视场。建立了角度预定回路的数学模型,并设计了基于自适应遗传算法的PID优化控制算法,实现了红外导引头的定向扫描控制。采用阶跃输入方式,在目标指示角为1°时,对角度预定回路进行了仿真,结果表明基于自适应遗传算法的PID控制器具有超调量小、稳态精度高、响应时间短的优点,满足了红外导引头定向扫描控制系统要求。
Considering that the Instantaneous Field Of View（IFOV） of infrared seeker is small,a line-by-line directional spiral scan was proposed.The IFOV of infrared seeker was selected through analysis on scanning period,detection probability and superposition coefficient.A mathematical model of angle-scheduled loop was established and PID algorithm optimized by Adaptive Genetic Algorithm（AGA） was designed for realizing the directional scanning control.When target-indicating angle was at 1°,system simulation of angle-scheduled loop was conducted with step-input.The results verified that the PID controller optimized by AGA has the advantages of small overshoot,high static accuracy and short response time,which can satisfy the requirements to the scanning control system of infrared seeker.
出处
《电光与控制》
北大核心
2010年第5期14-17,29,共5页
Electronics Optics & Control
基金
国家"八六三"计划资助项目(2008AA7050703)
关键词
定向扫描
红外导引头
自适应遗传算法
瞬时视场
directional scanning
infrared seeker
Adaptive Genetic Algorithm（AGA）
IFOV
