Research On Trade-off Optimization Of Civil Aircraft Conceptual Design Parameter Based On Operational Requirement

In order to predict performance of developed aircraft model,it's necessary to determine a range of overall design parameters in conceptual design stage.On the base of achieving performance requirements,the essence of optimizing civil aircraft overall design parameters is to achieve optimization of design goals,improve safety and competition.Based on the consideration of aircraft performance and actual operation requirements,this article establishes a multi-object optimization model of aircraft overall design parameters which considering operational requirements,and develops a set of calculating data which can optimize the parameters based on model data input,intelligent algorithm calculating and optimization result output.First,this article proposes design goals which considering the importance of reliability ? economy and environmental protection in aircraft design stage,establishes analytical model based on operational requirements respectively: dispatch reliability prediction model?life cycle cost estimation model and carbon emission estimation model,and determines the design parameters,makes sensitivity analysis with each parameters;Secondly,establishes constraints models according to relevant requirements of civil airworthiness and actual operation performance requirements;Then makes genetic algorithm with analyzing the three design goals to optimize the model on Visual Studio2013 platform,uses C # language to compile “Intelligent Optimization System of Aircraft Design Parameters”,which to achieve intelligent optimization;Finally,analyzes optimization results of different design goals after taking into actual examples,and proves that the multi-object optimization model of the civil aircraft overall design parameters has certain realistic theoretical significance by comparing different optimization results.