摘要
以电磁波为参照的飞行器姿态测量研究,可弥补空间参照物缺乏,丰富姿态测量手段。利用3个正交电(磁)场传感器接收电磁波三维电(磁)信号,测量运动平台姿态。该方法根据姿态参数估计的CRB(克拉美—罗界)是否为有限值,判断该环境电磁波信号能否用于运动平台姿态测量;根据基准姿态与实时姿态互相关矩阵变化,估计得到实时天线坐标系到基准天线坐标系的转换矩阵,据此将实时姿态坐标系下的运动平台姿态,转换到基准姿态坐标系下,再转换到地理坐标系下,完成运动平台姿态感知。电磁波信号可以为独立或相干信号,波达方向和极化状态任意,可不受多径效应困扰。仿真试验表明该方法稳定有效。
The attitude measurement based on electromagnetic wave can make up for the lack of spatial reference,and enrich the method of attitude measurement. In this paper, moving platform attitude is measured from the electromagnetic waves received by the three orthogonal dipole electric （magnetic） antennas.The CRB （Cramer Rao Bound） of the parameters estimation will determine whether the environmental electromagnetic wave signal can be used to measure moving platform Attitude/Heading.The transformation matrix, from the real-time antenna coordinates to the reference antenna coordinates, is obtained by comparing their correlation matrixes.We convert the platform attitude of the real-time antenna coordinates, into the reference antenna coordinates, then into the geographical coordinates. And the platform attitude is percept.The electromagnetic wave signals can be independent or coherent signal,and the attitude/heading estimation is not affected by muhipath effect.Simulation experiment shows that the method is stable and effective.
出处
《无线电工程》
2016年第4期30-34,51,共6页
Radio Engineering
关键词
电磁矢量传感器
极化状态
波达方向
姿态导航
EM Vector Sensor
state of polarization
DOA（ wave direction of arrival）
attitude determination
