|
Major technical parameters | Aperture | 110 m |
Work frequency | 150 MHz–115 GHz |
Antenna type | Shaped Gregorian |
F/D | 0.33 |
Surface precision of main reflector | <0.2 mm (when active surface is available) |
<0.6 mm (when active surface is not available) |
Surface precision of subreflector | <0.07 mm |
Beam pointing precision | <2.5 arcs (when wind speed is 4 m/s) |
Structural weight | Pitching structure < 3000 t |
Azimuth frame < 2500 t |
Range of pitch angle | 7°–89° |
Range of azimuth angle | ±270° |
|
Design scheme of actuators | Weight | <10 kg |
Stroke | 50 mm |
Positioning accuracy | 0.015 mm |
Operating temperature range | −30°C/60°C |
|
Surface detection scheme | Radio holography method | Accuracy: 0.06 mm |
Theodolite method | Accuracy: 1 mm |
Photogrammetric method | Accuracy: 0.04 mm |
Three methods could be adopted simultaneously during observation |
|
Surface adjustment amount calculation scheme | Electromechanical coupling calculation scheme oriented to beam pointing | According to beam pointing, employ structure deformation information, determine target surface through panel movement and fitting, and show optimal adjustment amount of actuators |
Adjustment amount database should be set up for quick retrieving. |
|
Active surface control scheme | Closed-loop control with functions of real-time communication, displacement control, real-time feedback, and limit alarm |
ARM microprocessor and S curve acceleration control algorithm |
Multithreading control mode software |
|
Location | Qitai city, Xinjiang province, China at an altitude of 1730–2250 meters |
|
Time path | The project proposal of QTT was submitted in 2017, and then QTT obtained the approval in Jan 2018. The feasibility study and preliminary design had been carried out for many years, and the construction is expected to build from 2018 to 2023. |
|