飞行器隐身与气动外形综合优化设计初探

Integrated Optimization of Aircraft Aerodynamic Performance and Radar Cross Section

雷达散射截面（ＲＣＳ）已成为飞行器设计的一个重要战技指标。由于ＲＣＳ和气动特性都与飞行器的外形密切相关，故外形设计时要兼顾隐身与气动力等多方面的因素。本文以对飞行性能影响较大的纵向气动力系数作为约束条件，某方位的ＲＣＳ均值最小作为目标函数，对飞行器隐身与气动外形的综合优化设计方法作了初步探讨，并给出应用示例，得到了比较合理的结果。

As the flight performance,radar cross section (RCS) has become an important tactical and technical target in aircraft designs.Since both the RCS and aerodynamic characteristics are closely related to the aircraft shape,consideration must be given to various factors of stealth and aerodynamic characteristics in aircraft shape designs. In the paper,a preliminary investigation on an integrated optimization method for the design of aircraft stealth and aerodynamic shape is carried out by taking the longitudinal aerodynamic coefficients which have considerable influence on the aircraft performance as restrained conditions,and the minimum mean value of the RCS at a certain azimuth as an objective function.An application example is given.Satisfactory result obtained shows that the method can be applied to the preliminary design of aircraft.