Integrated Aerodynamic-Stealth Optimal Design of Aircraft Configuration Parameters

Basing on the aerodynamic and RCS objectives,the geometrical parameters of the wing and tail planform and few geometrical parameters of fuselage are optimized．According to the requirements of the forth generation of fighter,the desirable and acceptable values of the objectives and constraints were determined. And according to the theory of fuzzy optimization,the satisfactory function of each objectives and constraints were determined. Then, 5 fuzzy optimization model are established by the application of different combinations of general satisfactory function and fluctuant weights or constant weights．So the designers can make choice according to their different design concepts and purposes．