高超声速飞行器前体/进气道参数重要性测度

针对机体推进高度一体化的吸气式高超声速飞行器前体/进气道相关参数对其性能指标的独立和交互作用问题,基于回归模型和二阶混合中心矩理论,以总压恢复系数为性能指标,提出了参数重要性测度新方法。设计了二维混压楔形前体/进气道变几何构型方案并给出重要性测度模型,定量和定性地对参数重要性进行了对比和分析。研究结果表明:前体/进气道相关参数间具有强的非线性作用,交互作用非常显著,独立作用可以忽略不计,且重要性测度模型易于扩展。

Important Measure of Forehead/Inlet Correlated Variables for Airbreath ing Hy personic Vehicle

With regard to important measure of forehead/inlet correlated variables for airbreathing hypersonic vehicle characterized by integrated body/propulsion , a novel mathematical model of important measure was proposed aimed at performance index by toll pressure recovery coefficient based on regression model and second-order moment around mean .Then mathematical model of important measure of two-dimensional mixed pressure forehead/inlet was derived .What′s more,engineering application of the proposed important measure model was brought out and was contrasted and analyzed in terms of quantitative and qualitative analysis .The results of research have illustrated that the proposed important measure model could compute independent and interaction importance of different precision and strong nonlinearity existed in forehead/inlet correlated variables ,and the method is liable to improve .