联翼布局传感器飞机多目标优化设计

A multi-objective optimization design model comprehensively considering aerodynamics, structure, and radar performance is proposed to meet the special mission demand of the joined-wing SensorCraft. The improved class function/shape function transformation method is used to complete the shape parameterization, the wind tunnel test performed to verify the aerodynamic analysis model, and the structural weight estimation model of the joined-wing configuration built based on the engineering beam theory. Moreover, based on the radar distance equation, a mathematical model for performance estimation of the antenna inside the wing is established. Using this model, the influence of the installation position and performance evaluation of the embedded antenna on the airfoil selection, structural weight and aerodynamic characteristics can be considered during the optimization process, and the global optimal design is finally obtained. The optimization results of a case show that, compared with the original design, the multi-objective optimization results can significantly improve the lift-to-drag ratio and detection range, meanwhile reducing the structural weight. The optimization results and sensitivity analysis verify the feasibility and necessity of this multi-objective optimization model.