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为了确定飞机起飞航迹,应用数值计算理论,提出了发动机瞬时推力的计算方法,以发动机推力曲线已知推力为基础,通过拉格朗日插值确定未知推力。基于计算的发动机瞬时推力,计算了起飞航迹,并与实测航迹进行了比较。计算结果表明:飞机1的实测拟合航迹与程序计算航迹的最大绝对误差不超过10 m,最大相对误差不超过3.9%;飞机2的实测拟合航迹与程序计算航迹的最大绝对误差不超过35 m,最大相对误差不超过8.3%,计算方法可靠。
In order to determine the flight path of the aircraft, a numerical method is proposed to calculate the instantaneous thrust of the engine. Based on the known thrust of the thrust curve of the engine, the unknown thrust is determined by Lagrange interpolation. Based on the calculated engine instantaneous thrust, the takeoff flight path was calculated and compared with the measured flight path. The calculation results show that the maximum absolute error between the measured flight path and the calculated flight path of aircraft 1 does not exceed 10 m and the maximum relative error does not exceed 3.9%. The measured flight path of aircraft 2 and the maximum absolute absolute value The error is less than 35 m, the maximum relative error is less than 8.3%, and the calculation method is reliable.