摘要
针对噪声实地监测法监测点布局不够灵活、测量结果受环境等影响,不能准确评价飞机噪声影响的问题,提出一种基于飞行轨迹的噪声计算方法。首先,利用改进的Douglas-Peucker算法划分航段;然后提出可行垂直轨迹的概念,分析离场过程中飞机推力、襟翼等变化规律,确定实际轨迹的标称垂直轨迹和垂直剖面管理程序,计算轨迹点的瞬时推力及轨迹航段等效稳定推力;最后,根据轨迹航段对噪声-推力-距离数据插值,叠加所有轨迹航段的噪声影响,得出整条轨迹对监测点的噪声影响。实验结果表明,该方法计算所得噪声值与实测值误差为0.24~1.58 dB,验证了该方法的可行性。
Aiming at the problem that the noise field monitoring method is not flexible enough in the layout of the monitoring points,and the measurement results are affected by the environment and cannot accurately evaluate the influence of aircraft noise,a calculating method based on flight trajectory is proposed.First,the improved Douglas-Peucker algorithm is used for segment devision.Then,the concept of feasible vertical trajectory is put forward,analyzing the changing rules of aircraft thrust and flap during departure process.Meanwhile,the nominal vertical trajectory and the vertical profile management procedure of the actual trajectory are determined,and the instantaneous thrust of the trajectory point and the equivalent stable thrust of the trajectory segment are calculated.Finally,based on the interpolation of noise-thrust-distance data of trajectory segment,the noise influence of all trajectory segments on the monitoring point is superimposed to obtain the noise influence of the whole trajectory on the monitoring point.Experiment result shows that the error between calculated noise value and the measured value is 0.24~1.58 dB,which verifies the feasibility of this method.
作者
王超
郝铭飞
WANG Chao;HAO Mingfei(College of Air Traffic Management,CAUC,Tianjin 300300,China)
出处
《中国民航大学学报》
CAS
2020年第6期1-5,共5页
Journal of Civil Aviation University of China
基金
中国民航大学中国民航环境与可持续发展研究中心开放基金项目(CESCA2019Z02)。
关键词
机场
飞行轨迹
离场噪声
推力
airport
flight trajectory
departure noise
thrust
