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CARE-ASAS Activity 3: ASM Autonomous Aircraft OSED. 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. OSED overview.

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care asas activity 3 asm autonomous aircraft osed

CARE-ASAS Activity 3: ASMAutonomous Aircraft OSED

CARE/ASAS Activity 3: ASM workshop Brétigny, 19 December 2001

objectives and tasks
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

osed overview
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

airspace characteristics
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

airspace characteristics1
Airspace characteristics

CARE/ASAS Activity 3: ASM workshop Brétigny, 19 December 2001

air traffic services
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

operations within ffas 1 2
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

operations within ffas 2 2
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

slide9

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

airborne functionality 1 3
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

airborne functionality 2 3
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

airborne functionality 3 3
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

emergency procedures
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

mas ffas transition
MAS/FFAS transition

CARE/ASAS Activity 3: ASM workshop Brétigny, 19 December 2001

ffas mas transition
FFAS/MAS transition

CARE/ASAS Activity 3: ASM workshop Brétigny, 19 December 2001