摘要
应用数值计算理论对飞机起飞滑跑距离数值积分算法进行了研究,用插值法对发动机瞬时推力和起飞气动数据的确定方法进行了改进,用迭代法确定了离地速度,基于改进算法编制了起飞滑跑距离计算程序。在发动机推力曲线已知时,对5种飞机的起飞滑跑距离进行计算,原算法的平均误差为55.6 m,改进算法的平均误差为23.4 m;在发动机推力曲线未知时,用程序计算某型飞机在12种条件下的起飞滑跑距离与实际滑跑距离对比的平均相对误差为2.9%。计算结果表明改进算法计算精度优于原算法。
The numerical value integral algorithm of aircraft take-off running distance was studied by numerical value calculation theory, and an improvement algorithm was put up. The calculation method of engine instantaneous thrust and take-off aerodynamics data was improved by interpolation method. The lift-off speed was calculated by iteration method. Aircraft take-off running distance calculation was programmed based on the improved algorithm. In order to test the improved algorithm, the take-off running distances of 5 aircrafts were computed when their engine thrust curves were offered. The average error of the former algorithm is 55.6 m, while the one of the improved program is 23.4 m. Furthermore, 12 kinds of take-off running distances of a certain aircraft were computed when its engine thrust curve wasn＇t offered. The average relative error between computation result and actual running distances is 2.9%. The results indicate that the computation precision of the improved algorithm is higher than the former algorithm. 4 tabs, 1 fig, 10 refs.
出处
《交通运输工程学报》
EI
CSCD
北大核心
2007年第2期24-28,共5页
Journal of Traffic and Transportation Engineering
基金
空军后勤部科研基金项目(JY06005)
关键词
机场工程
跑道长度
起飞滑跑距离
改进算法
airport engineering
runway length
take-off running distance
improvement algorithm
