目标闪烁对制导精度的影响  

Influence of Target Glint on the Precision of Guidance and Control

作　　者：林德福[1] 沈浩[1] 祁载康[1] 

机构地区：[1]北京理工大学机电工程学院,北京100081

出　　处：《北京理工大学学报》2007年第1期9-12,共4页Transactions of Beijing Institute of Technology

基　　金：国家部委基金资助项目(4302081)

摘　　要：分析了目标闪烁对寻的制导回路制导精度的影响.由于目标闪烁的频率通常小于或者与系统的频带相当,所以导弹无法滤掉此干扰信息,致使系统脱靶量增大.通过传递函数法实现对引入闪烁的比例导引制导系统回路脱靶量量纲一化,得到在闪烁输入下系统脱靶量与弹目相对运动速度无关,而与噪声功率谱均方根和系统响应速度的均方根成正比的结论.仿真分析表明,寻的制导系统由于闪烁带来的脱靶量将大于闪烁本身.最后针对某机载武器,通过引入影响因子来评价光斑抖动对制导精度的影响.The influence of target glint on the miss of the homing guidance system is analyzed. Since the target glint is essentially a very low frequency phenomenon whose bandwidth is typically equal to or less than that of the system, it is difficult for a missile to filter it out, or will cause the miss to increase. Expression of the non-dimensional miss distance is deduced using the transfer function method. A conclusion can be drawn that the miss distance has nothing to do with the closing velocity, being proportional to the square root of the noise spectrum density and that of the bandwidth of the dominant lag. Simulation showed that in homing systems the r. m. s. miss was higher than the r. m. s. value of the glint itself. Finally the influence of facula dithering on the guidance precision is estimated using the influence factor for some of aircraft weapons.

关 键 词：闪烁 脱靶量 比例导引 传递函数法 

分 类 号：V241.62[航空宇航科学与技术—飞行器设计]