Sentinel-4 Manipulator
Rotapod ESA S4-ITTT
Function
The ROTAPOD is a 6-axis parallel kinematic positioning system used for the motion simulation of the Sentinel S4 satellite. With support of the ROTAPOD the optics in the satellite are measured and calibrated on a high accuracy level.
Clean room compatible for ISO 5
Vacuum suitable up to 10-6 mbar
Operating temperature +40 °C to -40 °C, with built-in encoder and motor heating down to -170 °C
CEMEC Service
Idea and problem solving. Complete development and 3D design according to ECSS standard for clean room and vacuum operation. Thermal and structural simulations. Production drawings, manufacturing and assembly. Testing, qualification and acceptance.
Manufacturing
Assembly of one of the 12 precision universal joints.
Final assembly of the universal joints. Axis accuracy 2 µm, load up to 1 t
6 high precision drive units with a gear ratio 1:252000
Assembly of the integrated bearings. Over 8000 balls are installed.
Final assembly in clean room. All 6 drive rings are tested
Commissioning with software and load tests
Assembled with Sentinel 4
Final delivery state (here with satellite dummy)
Motion/Positioning
| Repeatability | 2.0 | arcsec |
|---|---|---|
| Accuracy | 2.0 /10° at 1°K | arcsec/µm |
| Stiffness | 15.0 /100 kg5.0 / 100 kg [Z] | arcsec/µm |
Customer
ESA / AIRBUS