直升机卫星通信旋翼遮挡问题仿真评估方法  

An Evaluation Method for Rotor Obstruction Problem in Satellite-to-Helicopter Communications

作　　者：陈刚 张学生 崔建华 瞿俊杰 CHEN Gang;ZHANG Xuesheng;CUI Jianhua;QU Junjie(Shanghai Tsingshen Technology Development Co.,Ltd.,Shanghai 201306,China)

机构地区：[1]上海清申科技发展有限公司研发部,上海201306 [2]上海清申科技发展有限公司,上海201306

出　　处：《数字通信世界》2022年第10期4-8,44,共6页Digital Communication World

基　　金：上海市临港新片区高新产业和科技创新专项资助:SH-LG-GK-2020-27。

摘　　要：直升机在利用卫星进行通信时,在飞行过程中卫星天线会受到直升机旋翼遮挡的影响,为有效分析评估直升机在不同飞行姿态下的卫通天线的受遮挡程度问题,提出计算平均遮挡率进行仿真分析的评估方法。通过定义遮挡面积占比表示遮挡率,基于投影变换原理,构建将天线面轮廓线沿卫星波束矢量向旋翼面投影,在旋翼面内进行遮挡率计算的数学模型,并利用该模型完成仿真系统设计。案例仿真结果表明,该分析评估方法能够直观分析出直升机在与不同轨道卫星通信时,不同飞行姿态下的遮挡程度变化,可以应用于天线的设计安装和通信试飞方案指导。In satellite-to-helicopter communications,rotor obstruction problem exists on the communication signals when the satcom antenna is located below the rotor blades.In this paper,the average obstruction rate which is defined as the proportion of obstruction area is used to assess the degree of signal obstruction.The model of calculating the average obstruction rate is based on the projection mapping principle,firstly constructs the projection of the antenna surface contour to the rotor plane along the satellite beam vector,and then the obstruction rate is calculated in the rotor plane.Using the model,a simulation analysis scheme is designed which can be used to analyze the obstruction variation at different azimuth and altitude angles.Finally,a case study of geostationary orbit satellite and low orbit satellite communication scenarios is given,which can clearly see the changes of rotor obstruction problem at different azimuth and altitude angles.

关 键 词：卫星通信 直升机 旋翼遮挡 仿真分析 

分 类 号：TN927.2[电子电信—通信与信息系统] TP391.9[电子电信—信息与通信工程]