Redundant flight controller architecture
A dual or triple-redundant flight controller system with hot-swap failover is the foundation of logistics reliability. Primary and secondary FCs run independent sensor suites (IMU, compass, barometer) and cross-monitor each other's outputs. If the primary FC diverges from expected state, the secondary assumes control within milliseconds. ArduPilot's redundant FC support and PX4's multi-EKF fusion provide the firmware foundation. Independent power supplies for each FC prevent a single voltage regulator failure from taking down the entire control chain.
