价值驱动设计方法及其在商用飞机方案参数优化中的应用

Value driven methodology and its application in optimal sizing of commercial aircraft preliminary design

商用飞机方案设计是一项复杂的任务,不同目标函数和约束条件得到不同的设计,需要在满足安全性要求的前提下取得飞机技术性能和商业收益之间的双赢。本研究运用价值驱动设计(VDD)理念,实现系统工程方法与多学科优化设计方法的紧密耦合,通过灵活的可定制、多层级的程序架构,建立了基于剩余价值(SV)模型的飞机设计优化框架。针对典型任务,使用该框架开展了针对飞机的剩余价值函数最大化的优化设计,并对比了针对直接使用成本(DOC)最小化进行优化得到的结果。结果分析表明,基于剩余价值模型的优化设计方案能够兼顾更多的利益相关方,改善飞机的经济性。飞机直接使用成本最小化的设计方案需要和价值最大化的设计综合考虑,以实现飞机使用经济性和产业经济性的协调,这对于新兴飞机制造商尤为重要。

The development of commercial aircraft is a complex task.Different objective functions and constraints lead to different designs.It is necessary to obtain a win-win solution between the technical performance and commercial benefits of the aircraft while meeting the safety requirements.Using a Value-Driven Design(VDD)methodology,this study achieves a close coupling between the system engineering method and the multidisciplinary optimization design.Through a flexible and customized aircraft design program,a design optimization framework based on the Surplus Value(SV)model is developed.This framework is used to carry out an optimization design of maximizing the surplus value of the aircraft for a typical flight mission.The results are compared with those obtained by optimizing the minimum Direct Operating Cost(DOC).The results show that design with minimum direct operating cost produces less competitive surplus value.The surplus value model provided better coordination among aircraft operating economics and industrial economics and can be used to obtain better and more balanced aircraft design.Such a methodology is crucial for emerging aircraft manufacturers.