MULTIDISCIPLINARY ROBUST OPTIMIZATION OF EARLY-STAGE AIRCRAFT WING DESIGN UNDER UNCERTAINTY
不确定性下早期飞机机翼设计的多学科鲁棒优化
基本信息
- 批准号:2159064
- 负责人:
- 金额:--
- 依托单位:
- 依托单位国家:英国
- 项目类别:Studentship
- 财政年份:2019
- 资助国家:英国
- 起止时间:2019 至 无数据
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Early aircraft design must cope with uncertainties that exist due to lack of design maturity, lack of knowledge about aerodynamic loads and constraints as well as model form uncertainties due to lack of confidence in the underlying physics simulation models. The ability to properly account for these uncertainties in early stage aircraft design optimisation becomes a key enabler for industry to properly trade optimum performance against the risks of achieving the performance and meeting the constraints (including key constraints on time to market). The project aims to build a data-driven computational framework (RDO-Air) for robust design and optimization of aircraft (A/C) structures in a multidisciplinary framework. RDO-Air would be applicable for early stage A/C design under a set of stringent design constraints imposed by considerations of weight penalty, flexibility in flight conditions, flight envelopes and risk minimization using a Bayesian inference-based optimization technique. It is important to highlight that the proposed design optimization under uncertainty would lead to ultimately lead to a multi-objective optimizing which explicitly considers the cost penalty for balancing the A/C performance with the risk of failing to meet the design loads.The specific application area for this work is related to the optimisation of the "jig twist" in the manufacture tooling and the impacts of this in terms of the achieved flight shape, aerodynamic performance, and on the overall design loads envelope. Within this specific use case the design loads have already been "fixed" including a "design margin" on the loads envelopes to cover uncertainties, and the challenge is to define the "optimal" jig twist in presence of design uncertainties (such as wing structural stiffness) to trade the confidence of achieving the performance benefits against the risk of exceeding the current design loads envelope.The project will involve the following: - Simulation of aerodynamic loads and performance indicators in a high dimensional parameter space defining early stage A/C wing configuration using Airbus' multidisciplinary aircraft simulation platform - Reduced order modelling using stochastic surrogates which to enable rapid stochastic sampling required for sensitivity analysis, Markov Chain Monte Carlo algorithms for Bayesian inference. - Multi-objective optimization of parametrized A/C wing using Bayesian inference-based robust optimization framework which gives the probabilistic estimates of optimal wing parameters along with the confidence of meeting the target design loads. - Assimilating the actual cost function of balancing the aerodynamic performance with the risk of re-design for failing to meet the load specs within the robust optimization framework, which would incorporate informed strategic decision making for a streamlined A/C design workflow.
早期的飞机设计必须处理由于设计不成熟而存在的不确定性,缺乏关于气动载荷和约束的知识,以及由于对基础物理仿真模型缺乏信心而导致的模型形状不确定性。在飞机设计优化的早期阶段,正确考虑这些不确定性的能力成为行业在实现性能和满足限制(包括上市时间的关键限制)的风险之间适当权衡最佳性能的关键因素。该项目旨在建立一个数据驱动的计算框架(RDO-Air),用于在多学科框架中进行飞机(A/C)结构的稳健设计和优化。RDO-Air将适用于早期空调设计,在一系列严格的设计约束下,考虑重量惩罚、飞行条件的灵活性、飞行包线和使用基于贝叶斯推理的优化技术将风险降至最低。必须强调的是,在不确定情况下提出的设计优化最终将导致多目标优化,该多目标优化明确考虑了平衡空调性能与不能满足设计负载的风险的成本损失。这项工作的具体应用领域涉及制造工装中的“夹具扭转”的优化以及这种优化对所实现的飞行形状、气动性能以及对总体设计负载包络的影响。在这个特定的用例中,设计载荷已经被“固定”,包括载荷包络上的“设计裕度”,以覆盖不确定性,挑战是在存在设计不确定性(如机翼结构刚度)的情况下定义“最佳”夹具扭矩,以权衡实现性能效益的信心和超过当前设计载荷包络的风险。该项目将涉及以下内容:-使用空中客车的多学科飞机仿真平台,在定义早期空调机翼构型的高维参数空间中模拟空气动力载荷和性能指标-使用随机替代进行降阶建模,以实现灵敏度分析所需的快速随机抽样,贝叶斯推理的马尔可夫链蒙特卡罗算法。-使用基于贝叶斯推理的稳健优化框架对参数化空调机翼进行多目标优化,该框架给出了最佳机翼参数的概率估计以及满足目标设计载荷的置信度。-在稳健的优化框架内,吸收平衡空气动力性能与重新设计未能满足负载规格的风险的实际成本函数,这将纳入精简空调设计工作流程的知情战略决策。
项目成果
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其他文献
吉治仁志 他: "トランスジェニックマウスによるTIMP-1の線維化促進機序"最新医学. 55. 1781-1787 (2000)
Hitoshi Yoshiji 等:“转基因小鼠中 TIMP-1 的促纤维化机制”现代医学 55. 1781-1787 (2000)。
- DOI:
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LiDAR Implementations for Autonomous Vehicle Applications
- DOI:
- 发表时间:
2021 - 期刊:
- 影响因子:0
- 作者:
- 通讯作者:
吉治仁志 他: "イラスト医学&サイエンスシリーズ血管の分子医学"羊土社(渋谷正史編). 125 (2000)
Hitoshi Yoshiji 等人:“血管医学与科学系列分子医学图解”Yodosha(涉谷正志编辑)125(2000)。
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Effect of manidipine hydrochloride,a calcium antagonist,on isoproterenol-induced left ventricular hypertrophy: "Yoshiyama,M.,Takeuchi,K.,Kim,S.,Hanatani,A.,Omura,T.,Toda,I.,Akioka,K.,Teragaki,M.,Iwao,H.and Yoshikawa,J." Jpn Circ J. 62(1). 47-52 (1998)
钙拮抗剂盐酸马尼地平对异丙肾上腺素引起的左心室肥厚的影响:“Yoshiyama,M.,Takeuchi,K.,Kim,S.,Hanatani,A.,Omura,T.,Toda,I.,Akioka,
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