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The development and application of a multi-criteria optimization method to the design of a 20-seat regional jet airliner.

机译：多准则优化方法的开发和在20座支线喷气客机的设计中的应用。

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摘要

The aircraft design process traditionally starts with a given set of top-level requirements. These requirements can be aircraft performance related such as the fuel consumption, cruise speed, or takeoff field length, etc., or aircraft geometry related such as the cabin height or cabin volume, etc.; This thesis proposes a new aircraft design process in which some of the top-level requirements are not explicitly specified. Instead, these previously specified parameters are now determined through the use of the Price-Per-Value-Factor (PPVF) index. This design process is well suited for design projects where general consensus of the top-level requirements does not exist. One example is the design of small commuter airliners.; The above mentioned value factor is comprised of productivity, cabin volume, cabin height, cabin pressurization, mission fuel consumption, and field length, each weighted to a different exponent. The relative magnitude and positive/negative signs of these exponents are in agreement with general experience. The value factors of the commuter aircraft are shown to have improved over a period of four decades. In addition, the purchase price is shown to vary linearly with the value factor.; The initial aircraft sizing process can be manpower intensive if the calculations are done manually. By incorporating automation into the process, the design cycle can be shortened considerably. The Fortran program functions and subroutines in this dissertation, in addition to the design and optimization methodologies described above, contribute to the reduction of manpower required for the initial sizing process.; By combining the new design process mentioned above and the PPVF as the objective function, an optimization study is conducted on the design of a 20-seat regional jet. Handbook methods for aircraft design are written into a Fortran code. A genetic algorithm is used as the optimization scheme. The result of the optimization shows that aircraft designed to this PPVF index can be competitive compared to existing turboprop commuter aircraft.; The process developed can be applied to other classes of aircraft with the designer modifying the cost function based upon the design goals.
机译：传统上，飞机设计过程始于一组给定的最高要求。这些要求可以是与飞机性能有关的，例如燃料消耗，巡航速度或起飞场长度等，或与飞机几何形状有关的，例如机舱高度或机舱容积等；本文提出了一种新的飞机设计过程，其中未明确规定一些顶层要求。取而代之的是，这些先前指定的参数现在是通过使用按价格价格因素（PPVF）索引确定的。此设计过程非常适合没有顶级要求的普遍共识的设计项目。一个例子是小型通勤客机的设计。上述价值因素包括生产率，机舱容积，机舱高度，机舱增压，任务燃料消耗和田间长度，每一项均加权为不同的指数。这些指数的相对大小和正/负号与一般经验一致。经证明，通勤飞机的价值因素在过去的40年中有所改善。另外，购买价格显示出随价值因数线性变化。如果手动进行计算，则初始的飞机选型过程可能需要大量人力。通过将自动化纳入流程，可以大大缩短设计周期。除上述设计和优化方法外，本文中的Fortran程序功能和子例程还有助于减少初始上浆过程所需的人力。通过将上述新设计过程和PPVF作为目标函数相结合，对20座支线飞机的设计进行了优化研究。用于飞机设计的手册方法已写入Fortran代码中。遗传算法被用作优化方案。优化的结果表明，按照该PPVF指数设计的飞机与现有的涡轮螺旋桨通勤飞机相比具有竞争力。设计师可以根据设计目标修改成本函数，从而将开发的流程应用于其他类别的飞机。

著录项

  • 作者

    Au, How Meng.;

  • 作者单位

    University of Kansas.;

  • 授予单位 University of Kansas.;
  • 学科 Engineering Aerospace.
  • 学位 Ph.D.
  • 年度 2007
  • 页码 277 p.
  • 总页数 277
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 航空、航天技术的研究与探索;
  • 关键词

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