| Citation: | FAN Z W，YU X Q，DAI Y L. Trade-off for top-level requirements of commercial aircraft using comprehensive evaluation and optimization[J]. Journal of Beijing University of Aeronautics and Astronautics，2023，49（9）：2415-2422 （in Chinese） doi: 10.13700/j.bh.1001-5965.2021.0670
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As the key process of aircraft design, top-level requirements should be carefully considered at the beginning of design activities. A quantitative trade-off method for top-level requirements of commercial aircraft has been proposed. According to the relationship between top-level requirements and aircraft conceptual design, characteristics of aircraft concept can be regarded as a set of feasible top-level requirements. The trade-off of top-level requirements is transformed to the optimization of design parameters. With the consideration of five criteria, including economy, comfort, environmental protection, flexibility, and safety/reliability, a comprehensive evaluation model for top-level requirements of commercial aircraft is established. The optimal set of top-level requirements can be found by the optimization for the best result of the comprehensive evaluation model. In the case of wide-body commercial aircraft, more reasonable top-level requirements are obtained, which reveals the feasibility of the comprehensive evaluation and optimization method.
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