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CARE-ASAS Activity 3: ASM Autonomous Aircraft OSED

This workshop aims to provide information on the operating environment and autonomous aircraft operations, including airspace characteristics, air traffic services, and emergency procedures. The objective is to support safety assessments and research and development efforts.

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CARE-ASAS Activity 3: ASM Autonomous Aircraft OSED

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  1. CARE-ASAS Activity 3: ASMAutonomous Aircraft OSED CARE/ASAS Activity 3: ASM workshop Brétigny, 19 December 2001

  2. Objectives and Tasks • Objectives: • To provide relevant information for safety assessment • R&D work, not any implementation objectives • Tasks: • Description of the operating environment and autonomous aircraft operations CARE/ASAS Activity 3: ASM workshop Brétigny, 19 December 2001

  3. OSED overview • Operating environment characteristics • Airspace and Traffic characteristics • Application Description • Expected benefits and constraints, human factors issues • Operating method without and with ASAS • Functional characteristics • Capturing time constraints • Information exchanges • Exception handling (human and system failures and emergency/contingency procedures) • Training CARE/ASAS Activity 3: ASM workshop Brétigny, 19 December 2001

  4. Airspace characteristics • FFAS surrounded by MAS only • Low/medium density and complexity • 4D RNAV (at least RNP1) RVSM applied • Segregated airspace : Only suitably equipped aircraft authorised (ADS-B, CDTI, CD&R capabilities) with qualified flight crew • Airborne self-separation • No fixed routes: aircraft fly their user preferred routes • Generic airspace CARE/ASAS Activity 3: ASM workshop Brétigny, 19 December 2001

  5. Airspace characteristics CARE/ASAS Activity 3: ASM workshop Brétigny, 19 December 2001

  6. Air Traffic Services • No ATC support within FFAS • New service: FFAS flow management • 3 levels: • Strategic / Pre-tactical / Tactical flow management • Role: • To define an orderly flow of traffic • To manage traffic global and local densities and traffic complexity to maintain them at appropriate level (E.g. Density shall remain under a maximum value) CARE/ASAS Activity 3: ASM workshop Brétigny, 19 December 2001

  7. Operations within FFAS (1/2) Three main phases: • Surrounding traffic surveillance and monitoring • Flight crew aware of surrounding traffic using its CDTI • Conflict detection and display • Detection of conflicts occurring within CD&R look ahead time (10min) • Aural and visual alerts • Display of traffic situation awareness and conflict information CARE/ASAS Activity 3: ASM workshop Brétigny, 19 December 2001

  8. Operations within FFAS (2/2) • Conflict resolution and implementation • Priority assigned to determine manoeuvring aircraft • Cross check and comparison of own and conflicting priorities done by flight crew • Flight crew has not priority • Manual or automatic solution computation • Flight crew has priority • Maintain its 4D trajectory until the other aircraft has resolve the conflict. • Both flight crews: Monitoring of resolution manoeuvre CARE/ASAS Activity 3: ASM workshop Brétigny, 19 December 2001

  9. Operations within FFAS Aircrew B Aircrew A Ttraffic Traffic display Look-ahead time 20 minutes ADS-B message (state information) ADS-B message (Intent information) Look-ahead time for CD&R 10 minutes TCD&R , TLow Conflict(s) detected Conflict(s) detected Priority determination Priority determination ADS-B message (CD&R information) Duration * A/A cross check on CDTI A/A cross check on CDTI Solution computation Solution engagement Automatic / Manual avoidance maneuver engaged ADS-B message (Intent information) TMedium Alarms Level 1 Level 2 THigh Level 3 Encounter Action and function Message CARE/ASAS Activity 3: ASM workshop Brétigny, 19 December 2001

  10. Airborne functionality (1/3) • Airborne surveillance • Based on ADS-B and own navigation data • Airborne conflict detection and resolution • Conflict detection • Based on surveillance function output and used aircraft state and intent information • ASAS alerting system • Three increasing levels: Low / Medium / High • Aural and visual alarms CARE/ASAS Activity 3: ASM workshop Brétigny, 19 December 2001

  11. Airborne functionality (2/3) • Conflict resolution • Manual solution • Automatic solution • Solver based on a priority rule based algorithm (EFR rules) • Produce conflict free trajectories (two lateral ones and a vertical one otherwise) taking into account conflicting aircraft and all surrounding aircraft trajectories • Integrate external constraints (e.g. not create high density zones, weather conditions, low cost) • After solution computation, flight plan automatically updated in the FMS CARE/ASAS Activity 3: ASM workshop Brétigny, 19 December 2001

  12. Airborne functionality (3/3) • HMI • CDTI Display of: • Surrounding traffic, • Conflict detection information • Priority determination • Conflict resolution • ACAS display • Priority given to ACAS display • Others • E.g. weather information CARE/ASAS Activity 3: ASM workshop Brétigny, 19 December 2001

  13. Emergency procedures • Own aircraft • Broadcast emergency messages (containing estimated positions) on VHF (and via ADS-B using the priority status field, if ADS-B emitter operating) • Contact by radio previous or receiving controller to obtain the VHF frequency of the MAS sector below • Join the vertical buffer zone below the FFAS • Contact controller of the MAS sector • Controller of the MAS below • Provide solution to the aircraft in emergency • Other aircraft • Assure separation with the aircraft in emergency using voice position reports or ADS-B messages CARE/ASAS Activity 3: ASM workshop Brétigny, 19 December 2001

  14. MAS/FFAS transition CARE/ASAS Activity 3: ASM workshop Brétigny, 19 December 2001

  15. FFAS/MAS transition CARE/ASAS Activity 3: ASM workshop Brétigny, 19 December 2001

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