模糊优化在飞机总体设计中的应用

Use of Fuzzy Optimization in Conceptual Design of Fighter

采用线性函数建立了飞机气动力与隐身一体化设计优化目标的满意度函数和约束的满足度函数,用综合加权法建立了多个目标的总满意度函数,研究了机翼平面外形参数和翼身融合参数的气动力/ 隐身一体化模糊优化设计,并与常规优化方法进行了对比;采用罚函数将约束优化转化为无约束优化。

Linear function is used to form the satisfactory functions of the objectives and constraints of the integrated aerodynamic stealth design of fighter geometrical parameters, such as the root chord and tip chord of the wing, half span of basic wing, the leading edge sweepback of the wing, the sideway elongation coefficient and the radius of the fuselage at the interface position with the wing, and then,basing on these functions, the multiobjective fuzzy optimization model was established. Punishment function is used to transfer the constrained optimization to unconstrained optimization and the Nelder and Mead Method is used to solve this optimization problem.