Redundancy Switching
Automatic Redundancy Switching Controller
The Automatic Redundancy Switching Controller is a fault-tolerance mechanism implemented with hardware switches and radiation-hardened NOR flash memory that autonomously redirects operations to backup units upon fault detection. Consuming 1 W of power, the controller performs pre-switch health verification before executing coordinated handoffs within 100 ms to minimize service interruption. Designed for long-mission availability within the Lunar Ark architecture, it supports a 100-year operational lifetime and a mean time between failures of 500,000 hours, enforcing per-subsystem failover policies and authenticated configurations across critical lunar infrastructure.
Automatic redundancy switching controller failing over to backup units on fault detection — minimising service interruption.
Purpose
Automatic redundancy switching controller failing over to backup units on fault detection — minimising service interruption.
Context
Child of L2-SLF-RECON within the Lunar Ark system
Principles
- ▸Per-subsystem failover policy
- ▸Sub-second switching for critical subsystems
- ▸Coordinated handoff to backup
- ▸Health verification of backup before switch
- ▸Authenticated switching commands
Typical implementations
- ▸NASA spacecraft redundancy heritage
- ▸Industrial fault-tolerant systems
- ▸Aerospace fail-over patterns
Lunar considerations
- ▸Long-mission essential for availability
- ▸Authenticated configurations
- ▸L1-DVT switching history
Specifications
Functional
| primary function | Automatic redundancy switching controller failing over to backup units on fault detection — minimising service interruption. |
| switchover time ms | 100 |
Physical
| mass kg | 0 |
| materials | Code on rad-hard NOR flash + hardware switches |
| vacuum compatibility | True |
Operational
| power consumption w | 1 |
| thermal range c | -40, 70 |
| lifetime years | 100 |
| mtbf hours | 500000 |
Interfaces
Provides
- Switchover events
- Power source switchover
Requires
- Fault analysis triggers
Cite this entry
Lunar Ark Codex. "Redundancy Switching" (L3-SLF-RECON-SWITCH). Retrieved 10 September 2026, from https://lunarark.com/entry/L3-SLF-RECON-SWITCH
Licensed CC-BY-SA 4.0. You may reuse and adapt this entry with attribution, under the same licence.