A Airborne Antenna Automatic Selection Algorithm in UAV TT&C Link
Large and medium-sized UAVs are usually equipped with multiple TT&C antennas to reduce the impact of airframe shielding and insufficient airspace coverage.The traditional method of selecting an-tennas manually in ground TT&C stations has some disadvantages such as low accuracy,poor timeliness,and a low level of automation.The TT&C link architecture of advanced UAV is analyzed.An automatic antenna selection algorithm based on passive antenna pattern is proposed,which uses a fitting curve based on measured or simulated antenna gain data,along with the azimuth and pitch of the ground station pro-jected into the UAVs coordinate system.The transformation matrix from the airframe to the phased array antenna coordinate system and the beam pointing algorithm is provided,which is suitable for phased array antenna or directional antenna.The signal quality algorithm is used as a backup method for automatic an-tenna selection when satellite navigation fails to function properly.Compared with the traditional manual mode,the algorithm is improved in automatic control capability,antenna selection accuracy and timeli-ness.The flight data show that the algorithm effectively supports the stable and reliable communication be-tween UAV and TT&C station.
UAVTT&C linkautomatic antenna selectionbeam pointingsignal to noise ratio
万方数据
维普
