基于布鲁斯特角约束的超低空目标拦截变结构导引律
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摘要
拦截超低空目标时,地海杂波和多路径效应使雷达导引头测量精度下降,当导弹擦地角在布鲁斯特角附近时,地海杂波反射系数最小,导引头测量精度较高。基于滑模变结构理论,设计满足布鲁斯特角约束的滑模变结构末制导律。仿真表明,设计的新型末制导律能够有效地将导弹视线角控制在布鲁斯特角附近,减小地海杂波和多路径效应的影响,且能保证导弹具有较高的制导精度。
Serious multipath effect and sea clutter,descending measurement accuracy and deteriorated guidance accuracy occur when a radar seeker detects very-low altitude targets. The reflection coefficient takes the minimum value and seeker measurement accuracy takes the maximum value when the grazing angle gets close to the brewster angle. Based on sliding mode variable structure control,terminal guidance law is designed to meet the brewster angle constraint. Simulations show that this new terminal guidance law can make angle of sight constraints near the brewster angle,the impact of see clutter and multipath effect can be reduced,and can guarantee a small miss distance.
Serious multipath effect and sea clutter,descending measurement accuracy and deteriorated guidance accuracy occur when a radar seeker detects very-low altitude targets. The reflection coefficient takes the minimum value and seeker measurement accuracy takes the maximum value when the grazing angle gets close to the brewster angle. Based on sliding mode variable structure control,terminal guidance law is designed to meet the brewster angle constraint. Simulations show that this new terminal guidance law can make angle of sight constraints near the brewster angle,the impact of see clutter and multipath effect can be reduced,and can guarantee a small miss distance.
引文
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[3]马井军,马维军,赵明波.低空/超低空及其雷达对抗措施[J].国防科技大学学报,2011,56(3):16-35.
[4]严韬,陈建文,鲍拯,等.一种基于压缩感知的天波超视距雷达短时还杂波的抑制方法[J].电子与信息学报,2017,39(4):1-7.
[5]王国章,李芸.一种满足布鲁斯特角约束的导引律研究[J].现代防御技术,2014,42(3):70-115.
[6]章惠君.抗地杂波干扰的最优导引律[J].航空兵器,2004,27(2):30-33.
[7]HARL N,BALAKRISHNAN.Impact time and angle guidance with sliding mode control[J].IEEE Transaction on Control Systems Technology,2012,20(6):1436-1499.
[8]吴鹏,杨明.带终端攻击角度约束的变结构制导律[J].固体火箭技术,2008,31(2):116-120.
[9]ZHOU D,SUN S,TEO K L.Guidance law with finite time convergence[J].Journal of Guidance,Control and Dynamics,2009,32(6):1838-1849.
[10]LEE C H,KIM T H,TANK M J,et al.Interception angle control guidance using proportional navigation with error feedback[J].Journal of Guidance,Control and Dynamics,2013,36(1):1-6.
[11]TAUB I,SHIMA T.Intercept angle missile guidance under time varying acceleration bounds[J].Journal of Guidance,Control and Dynamics,2013,36(1):83-96.
[12]秦潇,李炯,邵雷,等.基于扩张状态观测器的攻击角度约束制导律[J].弹道学报,2016,28(3):53-58.
[13]张刚,王运明.基于扩展比例导引律的制导模型[J].火力与指挥控制,2016,41(2):82-84.
[14]雷虎民.导弹制导与控制原理[M].北京:国防工业出版社,2006.