摘要
为了建立水上飞机起飞过程水动力数学模型。采用变量替换的方法,将三元多项式回归公式转换为多元线性回归表达式,通过对水上飞机单船身固定航态试验的水动阻力、水动升力关于模型速度、断级吃水、纵倾角的逐步回归分析,建立了水动力三元多项式回归分析模型,估算了95%置信水平的多元回归预测区间,结果表明区间预测很好地涵盖了实测结果,回归公式计算精度比较高。
For establishing hydrodynamic mathematical model of seaplane taking off. Take the method of variable substitution, and transform multivariate polynomial regression formulas to multivariate linear re- gression formulas. Fixed navigate state tests of seaplane single hull are conducted. Stepwise regression a- nalysis of test results, hydrodynamic resistance and hydrodynamic lift, are founded, regression analysis for- mula is trinary polynomail about model velocity, stepped draft and trim angle, and regression forecast re- gion at 95 % confidence level is estimated, the result shows that forecast region covers very well measured value, calculating precision of regression formulas is high.
出处
《航空计算技术》
2015年第4期97-100,共4页
Aeronautical Computing Technique
基金
航空科学基金项目资助(20112305003)
关键词
固定航态试验
多元线性回归
逐步回归
区间预测
seaplane single hull test
multivariate linear regression
stepwise regression analysis
forecast region
