The XY axis mount system consists of two mutually perpendicular rotation axes:
X axis: usually parallel to the ground, similar to the AZ axis but may have a different direction
Y axis: perpendicular to the X axis, but different from the traditional EL axis
In this configuration, the antenna is pointed by the coordinated rotation of the two axes, which is different from the elevation-over-azimuth system in which the azimuth is determined first and then the elevation is adjusted.
Main features of X-Y axis mount
Symmetrical structural design: The two axes of the XY axis mount are completely symmetrical mechanically
Balance: The weight distribution is usually more balanced than that of the elevation-over-azimuth system
No zenith blind spot: There is no tracking problem near the zenith in the traditional elevation-over-azimuth system
Dynamic performance: Excellent performance in high dynamic tracking scenarios
6.2m antenna with elevation-over-azimuth mount
Fixed X-Y pedestal view
2.2 Mechanical performance comparison
The mechanical advantages of XY-axis vehicles are mainly reflected in:
Structural rigidity: Symmetrical design makes the overall rigidity distribution more uniform
Bearing load: The force on each bearing is more balanced and the wear is more uniform
Wind resistance characteristics: Generally has better aerodynamic characteristics
Maintenance convenience: Symmetrical structure makes maintenance channels easier to design
2.3 Control complexity
Although the XY axis mount has mechanical advantages, its control system is relatively complex:
Real-time coordinate conversion is required
The axis coupling effect is more obvious
More accurate axis calibration is required