高原机场起飞滑跑距离计算模型构建与分析

Construction and Analysis of Take-off Sliding Distance Calculation Model on Plateau Airport

起飞滑跑距离是评价起飞性能好坏的重要指标,由于高原机场空气密度减小、发动机可用推力下降,高原机场的起飞滑跑距离与平原机场存在较大差异。构建高原机场起飞滑跑距离计算模型,以某型飞机为例,基于Matlab/Simulink平台建立飞机升阻力系数和发动机可用推力模型,将起飞滑跑距离计算结果与飞行手册数据对比,验证计算模型的有效性,分析计算误差产生的原因,对高原机场起飞滑跑距离进行计算,给出不同压力高度下起飞质量、风速、离地迎角、温度和发动机工作状态与起飞滑跑距离的关系曲线。验证表明,所建立起飞滑跑距离计算模型精度较高,具有一定的实用价值,分析结果可以为实际飞行提供参考。

Take-off sliding distance is an important index to evaluate take-off performance.Due to the decrease of air density and engine available thrust, the take-off sliding distance of plateau airport is quite different from that of plain airport.The calculation model of the take-off sliding distance of a certain type of aircraft plateau airport is constructed.Based on the Matlab/Simulink platform, the lift coefficient and the drag coefficient of the aircraft and the available thrust model of the engine are established, and the calculation block diagram of the take-off sliding distance is set up.Comparing the calculation results with the flight manual data, the validity of the calculation model is verified, and the reason for the calculation error is analyzed.The relationship curves of altitude, take-off quality, wind speed, lift-off angle of attack, temperature engine working state and take-off run distance are given.The validation shows that the model established in this paper has high accuracy and practical value.The analysis results can provide reference for actual flight.