低成本小口径动中通天线航姿参考系统设计

Design of attitude and heading reference system for Low-cost and small-aperture SOTM antenna

低成本小口径动中通天线普遍使用由MEMS器件构成的航姿参考系统测量由于载体运动对天线造成的角运动干扰。针对MEMS器件精度差,无法完成寻北以及漂移速度快的缺点,引入三轴磁力计信息,提出了一种基于扩展卡尔曼滤波的航姿参考算法,并以高精度惯导作为基准,通过摇摆试验验证了算法的精度。

Attitude and Heading Reference System （AHRS） based on MEMS sensors is widely used in low-cost and small-aperture SOTM antennas to measure the disturbance of angular motion caused by carrier’s movement. Aiming at the disadvantage of the low precision,incapacity of north seeking and fast drift of MEMS sensors, a algorithm of AHRS based on extended Kalman filter is proposed with a tri-axial magnetometer involved. The precision is verified by comparing with a high precision INS through swing experiment.