利用BRDF实验测量获取目标表面单位面积激光雷达截面

Laser Rader Cross-Section Obtained by the Measurement of Bidirectional Reflectance Distribution Function

介绍了一种利用双向反射分布函数实验测量获取目标表面单位面积激光雷达截面的方法,运用双向反射分布函数测量系统在特定激光波长下(1.06μm)对导弹蒙皮和坦克前甲板样片进行实验测量,根据样片的BRDF实验数据,将遗传模拟退火算法应用于目标表面BRDF统计模型的参数反演中,获取样片的BRDF模型参数,然后根据目标表面的双向反射分布函数与单位面积激光雷达截面之间的函数关系,进而可以求出样片的单位面积激光雷达截面的函数表达式。实验数据曲线表明,拟合后的实验数据与参与优化的实验数据吻合得比较好,结果说明用这种方法获取目标表面单位面积激光雷达截面是可行的和有效的。

The method that the Laser Rader Cross-Section （LRCS） per unit area of the object obtained by the experiment of Bidirectional Reflectance Distribution Function （BRDF） was introduced. BRDF of the skin of the missile and the foredeck of the tank was measured at the laser wavelength （1.06μm）. The parameters of BRDF model were obtained when the Genetic Simulated Annealing Algorithm was applicable to the parameters inversion based on the BRDF data. The LRCS per unit area was deduced according to the BRDF of the object surface. The experimental data curves fitted well with those optimized which showed that the method was feasible and effective.