周视脉冲激光引信海杂波回波功率建模与仿真

Model and simulation of sea clutter echo power of the omnidirectional pulse laser fuze

针对周视脉冲激光引信在超低空条件下照射到海面时产生的海杂波干扰信号易使激光引信虚警率高的问题,以激光散射特性和海面运动特性为基础,提出了一种基于面元积分法的宽波束激光照射面积自适应解算方法,建立了周视脉冲激光引信海杂波回波功率模型。仿真结果表明:海面风速越大、激光入射角越大,海杂波回波功率越强;相同条件下,入射角为90°时的回波功率约为60°时的2倍,约为45°时的3倍。该方法可以作为周视脉冲激光引信海面试验的有效补充,可为超低空条件下抗海杂波干扰设计提供技术支撑。

Sea clutter interference signal can be generated when omnidirectional pulse laser fuze is working at super-low-alti-tude over the sea, resulting in the increase of false alarming rat〈 To solve this problem, a sea clutter echo power model of omnidirectional pulse laser fuze is conatructed. Based on laser scattering properties and fuze kinetic characteristics over the sea, a self- adaptive method is proposed for calculating wide beam pulse area Simulation results show that the sea clutter echo power increases as wind speed and laser incident angle increas. Especially, the echo power for incident angle of 90° is as high as two times of the echo power for incident angle of 60° and three times of the echo power for incident angle of 45°. A useful method is provided for panoramic pulse laser fuze to survive from sea clutter interference.