减少飞机起飞质量和空载质量估算误差研究

Reducing the Estimation Error of the Takeoff Gross Mass and Empty Mass of Jet Transport Aircraft

目的 研究减少飞机概念设计时空载质量和起飞质量估算误差方法 通过对一些新型运输飞机的基型和衍生型数据进行统计分析研究,拟合出空载质量估算相对误差与航程之间的二阶多项式关系曲线,导出飞机起飞质量、空载质量和航程之间的关系式,改进了Roskam的空载质量估算公式,通过对利用Roskam估算公式和改进后Roskam估算公式的计算结果分析对比,得出了较为满意的结果结果 空载质量和起飞质量的估算误差范围均减至±5%以内结论 利用改进的Roskam方法。

Aim To study reduction of the estimation errors of takeoff gross mass and empty mass during the conceptual design of jet transport aircraft. Methods By using some data of basic and derivative, the relations among the takeoff mass empty mass and range were found through the multi degree polynomial regression. And the improved estimation formula of the empty mass was studied. The computational results with Roskam's method and the improved formula were analysed and contrasted. Results The reduction of the estimation error of the takeoff gross mass and empty mass is within the extent of ±5%. Conclusion By means of the improved formula of Roskam, the estimation errors of takeoff gross mass and empty mass are greatly reduced.