一种双天线组合导航系统基线偏差角的测量方法

A measurement method to baseline deviation angle method of dual antenna integrated navigation system

双天线组合导航系统安装时,双GPS天线构成的基线方向与惯性测量单元航向轴指向之间存在一定的偏差角度,系统需要标定该偏差角用于修正两者之间的测量误差,从而保证系统输出数据的准确性。针对这一问题,提出了一种基于全站仪的基线偏差角测量方法,结合惯导测量坐标系给出了测量原理和详细计算过程。实验表明,所提出的方法能够满足系统的安装要求,工程中易于操作和实现,适用于动基座平台下组合导航系统的标校。

Angle deviation between the dual GPS antenna baseline and inertial measurement unit heading axis direction is inevitable when a dual antennas integrated navigation system is assembled. The system needs to be calibrated so that the angle deviation can be corrected,and to ensure the accuracy of the inertial navigation system output azimuth angle. To this end,this paper proposes the baseline deviation angle measuring method based on total station,and illustrats the measuring principle and detailed calculations with an INS measurement coordinate system. The results show that the proposed method can meet the system＇s requirements,is easy to operate and achieve in engineering,and can be applied in the calibration of an integrated navigation system with a moving base platform.