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针对飞行器外形设计这一复杂的多目标问题,开展了相应的多目标优化方法研究。采用系统分解法来降低大系统的复杂度是工程设计中常用的方法,但是传统的系统分解法在处理多目标问题时通常是把多目标问题转化为单目标问题,最后得到单一优化解。利用PARETO方法的特点,提出了基于PARETO的系统分解法来解决传统系统分解法使用中的这个问题,经过优化可以得到均匀分布的PARETO解集,便于进行分析比较和选择。最后针对具体算例进行气动与隐身特性的综合优化设计,经过一轮优化后,所得到的一系列优化方案其气动和隐身性能都有较大提高,不仅达到了期望的设计要求,而且可以对该解集进行分析比较,以选择需要的优化结果。
Aiming at the complex multi-objective design of aircraft shape design, a multi-objective optimization method is developed. However, the traditional method of system decomposition usually transforms multi-objective problems into single-objective problems when dealing with multi-objective problems and finally obtains a single optimal solution. Utilizing the characteristics of PARETO method, the system decomposition method based on PARETO is proposed to solve this problem in the traditional system decomposition method. After optimization, an evenly distributed PARETO solution set can be obtained for analysis, comparison and selection. Finally, a comprehensive optimization design of aerodynamic and stealth characteristics is carried out for a specific example. After a round of optimization, a series of optimization schemes have been greatly improved in aerodynamic and stealth performance, not only to meet the desired design requirements, but also to The solution set is analyzed and compared to select the desired optimization result.