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Improved Preliminary Sizing Method for Multidisciplinary Aircraft Design Optimization

机译：用于多学科飞机设计优化的改进的初步定型方法

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摘要

A systematic aircraft sizing and design synthesis process is developed and presented to obtain an optimum configuration rapidly at an early stage of aircraft design. A preliminary sizing phase is developed by using simple and systematic empirical relations to work out a first layout easily and accurately from user requirements and airworthiness constraints. This preliminary sizing capabilities work on conventional and unconventional aircrafts, jet, piston and propeller engine type. Validations are performed on Unmanned Aerial Vehicle-UAV, Unmanned Combat Aerial Vehicle-UCAV and three regional jet aircraft; the results show good agreement with aircraft configuration data. Then, this preliminary sizing loop provides the first layout in a conceptual aircraft design synthesis process and serves as a baseline for optimization. Analysis modules are well-developed and validated before being integrated into the multidisciplinary optimization environment and the aircraft configuration is refined in the conceptual design synthesis stage. A Multidisciplinary Feasibility technique is applied to resolve the coupling of variables in the aircraft conceptual design synthesis process. A case study is presented by the multidisciplinary design of a regional jet aircraft that demonstrates the feasibility and effectiveness of rapid aircraft configuration generation. The optimum results show a 7.2% improvement in total take-off gross weight compared to the regional jet aircraft baseline and better performance-lift drag ratio.
机译：开发并提出了系统的飞机尺寸和设计综合过程，以便在飞机设计的早期阶段迅速获得最佳配置。通过使用简单和系统的经验关系来开发初步的尺寸确定阶段，以便根据用户需求和适航性约束轻松而准确地制定出第一个布局。这种初步的定型能力适用于传统和非传统飞机，喷气式，活塞式和螺旋桨式飞机。验证是在无人机，无人战斗机和三架支线喷气飞机上进行的；结果表明与飞机配置数据吻合良好。然后，这个初步的尺寸调整循环提供了概念飞机设计综合过程中的第一个布局，并作为优化的基准。分析模块经过精心开发和验证，然后再集成到多学科优化环境中，并且在概念设计综合阶段对飞机配置进行了完善。应用多学科可行性技术来解决飞机概念设计综合过程中的变量耦合问题。支线喷气飞机的多学科设计提出了一个案例研究，证明了快速生成飞机配置的可行性和有效性。最佳结果表明，与支线喷气飞机的基线相比，总起飞毛重提高了7.2％，并且性能提升阻力比更高。

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