At Dufour Aerospace, we recently completed a full flight from takeoff to landing using our Unified Velocity Controller (UVC) with GNSS denied.
In most drone systems, losing GNSS means losing reliable position and velocity estimates. This typically leads to degraded flight performance, increased pilot workload, or mission interruption.
During this flight, the Aero-30 maintained stable control throughout, including transitions between hover and forward flight, without requiring GNSS data for stable flight control.
To achieve this, the system combines multiple onboard data sources, including wing-tilt sensors and visual odometry, which estimates movement by analysing camera images, to maintain accurate airspeed and ground speed even when GNSS is unavailable.
From an operational perspective, this directly addresses a key limitation in current drone operations:
• Missions can continue in GNSS-denied environments instead of being aborted
• Hover and transitions remain stable without external positioning
• Pilot intervention is reduced during critical phases of flight
This is particularly relevant for operations in urban areas, mountainous terrain, or environments where GNSS signals are unreliable or intentionally disrupted. This is a step toward systems that can operate consistently in real-world conditions, not just ideal ones.
If you are working in environments where GNSS is not guaranteed, learn more:
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