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以无人作战飞机为对象,在其概念设计阶段应用多学科设计优化方法进行总体参数设计。基于标准的系统级优化算法,建立了一种设计优化流程。对无人作战飞机气动外形进行参数化表示;以起飞总重最小为目标,给出了无人作战飞机多学科设计优化问题的定义;系统分析考虑气动、质量、性能3个学科,各个学科的分析模型采用半经验公式,系统寻优采用遗传算法。算例优化的结果表明所提出的流程应用在无人作战飞机概念设计阶段是可行的,能够解决总体参数设计问题。
Unmanned combat aircraft as the object, in the conceptual design phase of multi-disciplinary design optimization method for the overall parameter design. Based on the standard system-level optimization algorithm, a design optimization process is established. The parametric representation of the aerodynamic profile of unmanned combat aircraft is given. The objective of multi-disciplinary design optimization of unmanned combat aircraft is given with the goal of minimum total take-off weight. The system analysis considers three disciplines: aerodynamics, mass and performance. The semi-empirical formula is adopted in the analysis model, and the genetic algorithm is used in the system optimization. The results of the example optimization show that the proposed process is feasible in the conceptual design stage of UAV and can solve the problem of overall parameter design.