基于最小二乘抗差估计的飞机噪声距离特性回归分析

 飞机噪声距离特性曲线是进行飞机噪声环境影响评价的重要资料,然而现阶段只能通过实测获得测量数据拟合得到。本文针对进行飞机噪声距离特性拟合时,有效感觉噪声级L_EPN和测点到飞行轨迹最短距离的测量数据存在误差的问题,采用抗差理论来平衡数据之间的离散性,选取最小二乘抗差估计方法和IGGI权函数方案,根据飞机噪声距离特性曲线的分布形式,拟合各系数,得到起飞着陆噪声距离特性曲线。以某型飞机起飞着陆为实例,验证了该方法的可行性。

Analysis of Aircraft Noise-distance Characteristic Curve Based on Robust Least-squares Estimation

The noise-distance characteristic curve is an important technical index, which can only be obtained by fitting the data of the field test. In view of the fact that there are errors in the test of L_EPN and the least distance from test points to flight tracks, the robust theory is applied to balance the discreteness among data. The robust least-squares method and the IGGI weighting-function method are chosen to determine the coefficients in the formula according to the form of the aircraft noise-distance characteristic curve, and the aircraft noise-distance characteristic curves for takeoff and landing are obtained based on the formula. An example of takeoff and landing for a type of aircraft is taken to test and verify the feasibility of the method proposed in this paper. This paper provides a theoretical basis for the environmental impact assessment of the airplane noise in airport.