基于并行子系统的飞行器多学科稳健优化设计

Study of Aircraft Multidisciplinary Robust Design Optimisation Based on Concurrent Subsystem

研究了并行子系统稳健优化设计方法在飞行器设计中的应用。分别采用并行子系统稳健优化设计、系统分析和并行子系统分析3种不同方法进行了计算,得出的稳健结果表明并行子系统稳健优化设计方法优于其它2种方法。该方法主要有3大改进:一是在MDO环境中,增加了不确定性的分析;二是允许系统层使用离散变量;三是在系统协调过程中,采用人工神经网络的响应面提供定量的近似信息。

This paper introduces the Concurrent Subsystem Robust Design Optimisation method, and studies the simple application of the method to the design of an aircraft. The Concurrent Subsystem Robust Design Optimisation method and other two different methods are adopted in computation; the robust result indicates that the Concurrent Subsystem Robust Design Optimisation method is better than the other two methods. There are three ameliorations in the new method, the first one is that uncertainty analysis is added under MDO circumstance. Secondly, it is allowed to use disperse variable in the system level. Thirdly, neural network response surface is applied to providing measurable information.