Docking Alignment
Mechanical + Optical Docking Alignment Aids
Mechanical and optical docking alignment aids are passive docking fixtures comprising aluminum guide ramps and retroreflective fiducials that guide autonomous rovers into position within a 5 mm tolerance. In the lunar environment, where vacuum, abrasive regolith, and 300 K temperature swings degrade complex dockside mechanisms, this 15 kg assembly operates with zero electrical power consumption by eliminating active electronics. Physical funnels mechanically channel approaching hardware into alignment, while robot-side sensors track the passive visual markers for pre-mate position verification, enabling a 50-year service life and a mean time between failures of 500,000 hours.
Mechanical guides + optical fiducials at docks enabling autonomous final alignment despite navigation uncertainty.
Purpose
Mechanical guides + optical fiducials at docks enabling autonomous final alignment despite navigation uncertainty.
Context
Child of L2-ROB-DOCK within the Lunar Ark system
Principles
- ▸Mechanical funnel guides robot into position
- ▸Optical fiducials (AprilTag or QR) for final cm-level alignment
- ▸Sensor-fusion alignment confirmation
- ▸Pre-mate position verification
- ▸Long-life passive design
Typical implementations
- ▸AGV docking systems (terrestrial)
- ▸Robot fiducial systems (AprilTag, ArUco)
- ▸ISS docking heritage
Lunar considerations
- ▸No active alignment electronics — passive features
- ▸Long-life mechanical features
- ▸Robot-side sensor handles alignment
Specifications
Functional
| primary function | Mechanical guides + optical fiducials at docks enabling autonomous final alignment despite navigation uncertainty. |
| alignment tolerance mm | 5 |
Physical
| mass kg | 15 |
| materials | Aluminum ramps, Retroreflective fiducials |
| vacuum compatibility | True |
Operational
| power consumption w | 0 |
| thermal range c | -40, 70 |
| lifetime years | 50 |
| mtbf hours | 500000 |
Interfaces
Provides
- Aligned dock for charging
- Standardised docking alignment
Requires
- Foundation mounting
Cite this entry
Lunar Ark Codex. "Docking Alignment" (L3-ROB-DOCK-ALIGN). Retrieved 10 September 2026, from https://lunarark.com/entry/L3-ROB-DOCK-ALIGN
Licensed CC-BY-SA 4.0. You may reuse and adapt this entry with attribution, under the same licence.