19-2- A3.02-2710

 80NSSC19C0290

 Increasing Autonomy in the National Airspace System (NAS)

 Performance Based Autonomous Precision Approach and Landing System

Estimated Technology Readiness Level (TRL) :
Begin: 5
End: 8

Technical Abstract (Limit 2000 characters, approximately 200 words)

Novel aircraft concepts enable a future Air Transportation System (ATS) with reduced emissions, reduced noise, improved mobility, and radically new modes of transportation, such as urban air taxis, autonomous deliveries of goods, and improved weather and ground traffic monitoring. The future ATS will need to support an incredibly diverse set of vehicles operating from urban vertiports in addition to conventional airfields.

Approach and landing systems were originally designed for tube and wing aircraft operating between large airfields with long, clear approach paths free from obstacles. Similar performance characteristics across the fleet enabled the creation and publication of standardized approach and landing trajectories. Future aircraft, especially those designed for high cruise efficiency, may not be capable of meeting standardized approach and landing performance criteria.

Urban air mobility concepts typically require small vertiports without clear approach paths increasing the likelihood of encountering wind shear and turbulence during approach and landing. Low wing loaded and disc loaded vehicles, which include many future air vehicle concepts, are more susceptible to turbulence and face larger deviations from the desired trajectory in turbulent conditions.

We propose researching, developing, and commercializing an innovative solution to these challenges called the Performance-based Approach and Landing System (PALS). PALS will use information about the air vehicle’s performance and estimates of current turbulence and wind shear levels to autonomously create safe performance-based trajectories for approach and landing. PALS will be able to estimate and control the aircraft’s future position along the generated trajectory to coordinate with air traffic control or directly with other aircraft. PALS is a key component in enabling a future air transportation system consisting of a diverse set of vehicles operating from urban vertiports and conventional airfields.

Potential NASA Applications (Limit 1500 characters, approximately 150 words)

• Testbed supporting development and validation of future ATS technologies in a relevant flight environment.
• Enables NASA researchers to gather critical flight data on improving interoperability of diverse aircraft sets.
• Supports trajectory sharing to simulated air traffic control and aircraft-to-aircraft conflict resolution and sequencing.
• Reduced workload and improved performance for conducting surveys and remote sensing for NASA Earth Science. Improved data post-processing and georeferencing.

Potential Non-NASA Applications (Limit 1500 characters, approximately 150 words)

• Performance-based approach and landing system for manned aircraft. Reduced fuel consumption and noise from commercial aviation.
• Performance-based approach and landing system for UAS. Improved UAS approach and landing performance, reduced operating area required for UAS, and decreased likelihood of damage resulting from the approach and landing task.

Duration: 24