基于二级优化的低RCS外形设计方法

针对飞行器外形隐身优化问题,提出了一种流程简单,可同时优化外形轮廓和剖面形状的二级优化方法。这种方法将优化流程分为外形轮廓级和剖面形状级两个层次:外形轮廓级优化任务是将轮廓形状参数传递给剖面形状级,并对外形轮廓进行优化;剖面形状级优化任务是对剖面形状进行优化,并将目标函数值返回外形轮廓级。二级优化的最终结果可获得最优的轮廓形状和剖面形状。以一个具有低RCS特征的飞行器机身为算例,验证了这种二级优化方法的可行性和有效性。

A Two-level Optimization Design Approach for Low RCS Airframe Shapes

This paper proposes a two-level optimization desgn approach to low observable aircraft configurations.The approach is simple in terms of flowchart and provides the ability to conduct both the contour and section optimization simultaneously.The approach is divided into two levels including contour optimization and section optimization: the contour optimization send the contour parameters to the level of section optimization to find the optimum contour;and the section optimization is to find the optimum section shape for the given contour parameters and feedback the object function to the level of contour optimization.This two-level approach is able to find out the optimum shape including both the contour and section shape.A low radar cross section design optimization problem for a simlpe fuselage shape was used to verify the approach.