Synchronisation Déterministe Sub-Microseconde pour Aéronefs Avancés

AAVSync Time-Triggered Synchronization Architecture

Sub-Microsecond IEEE 1588 PTP Clock Distribution and Multi-Vehicle Phase Lock

Central System: Airborne Master Clock Enclave - SAE AS6802 TTEthernet Hub

Aviation Architecture Nodes

• Rubidium Atomic Local Oscillator
• Hardware PTP Timestamping Engine
• DEP Motor Inverter Phase Synchronizer
• Distributed Radar Aperture Trigger
• Inter-Aircraft Optical PTP Link

Architectural Layers & Protocol Stacks

• Physical Clock Generation & Holdover (Chip-Scale Atomic Clock (CSAC) / Sub-Picosecond Allan Deviation): Chip-scale atomic clocks (CSAC) and oven-controlled crystal oscillators (OCXO) providing ultra-low phase noise and microsecond holdover during GNSS outages.
• Time-Triggered Ethernet Bus Backbone (SAE AS6802 / ARINC 664 Part 7 / Gigabit TTEthernet Switches): Hardware-enforced deterministic message delivery conforming to SAE AS6802, reserving conflict-free microsecond time slots for flight control commands.
• Distributed Motor Phase Synchronization (Field-Oriented Control (FOC) Phase-Locked Loops / Optical Encoders): Locking rotor shaft angles across 12 distributed electric propulsion motors to cancel acoustic resonances and minimize airframe vibration.
• Free-Space Inter-Aircraft Optical Synchronization (Free-Space Optical (FSO) Pulse Transmission / TDoA Alignment Engine): Modulated laser links transmitting timing pulses between formation aircraft, enabling synthetic aperture radar (SAR) interferometry in flight.

Flight Telemetry Metrics: < 50 ns (Onboard Network Clock Synchronization) | < 1 µs (Inter-Aircraft Wireless Clock Jitter) | Zero (Transmission Contention Window Collision) | DAL A (DO-178C / DO-254 Determinism Level)