ATA 27 Flight Controls

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ATA 27 Flight Controls
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ATA 27 Flight Controls

• Primary flight controls
• Trim
• High Lifting Devices

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ATA 27 Flight Controls

• Primary flight controls
• Pitch axis
• Elevators
• Roll axis
• Ailerons (high and low speed)
• spoilers
• Yaw axis
• Rudder
• Yaw damper

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ATA 27 Flight Controls

• Trims
• Pitch trim
• Stabilizer/elevator trim
• Roll trim
• Aileron trim
• Yaw trim
• Rudder trim

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ATA 27 Flight Controls

• High Lifting Devices
• Leading edge flaps, slats
• Trailing edge flaps

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ATA 27 Flight Controls

• Cable command and actuation
• Cable command hydraulic actuation(Fly By Cable)
• 737,757,767,747,A300,MD-11...
• Electric signal command hydraulic actuation(Fly
  By Wire)
• 777, A320, A330, A340
• Electric signal command ElectroHydrostatic
  Actuations (EHAs)
• A380

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ATA 27 Flight Controls

• Fail-Passive flight control system.
• A flight control system is fail-passive if, in
  the event of a failure, there is no significant
  out-of-trim condition or deviation of flight path
  or attitude but the landing is not completed
  automatically. For a fail-passive automatic
  flight control system the pilot assumes control
  of the airplane after a failure.
• Fail-Operational flight control system.
• A flight control system is fail-operational if,
  in the event of a failure below alert height, the
  approach, flare and landing, can be completed
  automatically. In the event of a failure, the
  automatic landing system will operate as a
  fail-passive system.

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ATA 27 Flight Controls

• Cable command and actuation

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ATA 27 Flight Controls

• Cable command hydraulic actuation

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ATA 27 Flight Controls

• Cable command hydraulic actuation

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ATA 27 Flight Controls

• Cable command hydraulic actuation

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ATA 27 Flight Controls

• Cable command hydraulic actuation

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ATA 27 Flight Controls

• Cable command hydraulic actuation

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ATA 27 Flight Controls

• Cable command hydraulic actuation

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ATA 27 Flight Controls

• Electric signal command hydraulic actuation
• (Fly-By-Wire)
• The FBW must meet extremely high levels of
  functional integrity and availability.
• The heart of the FBW concept is the use of triple
  redundancy for all hardware resources
• computing system
• airplane electrical power
• hydraulic power
• communication paths
• The multiple redundant hardware are required to
  meet the numerical safety requirements. Hardware
  redundancy can be relied upon only if hardware
  faults can be contained fail-passive electronics
  are necessary building blocks for the FBW
  systems. In addition, FBW computer architecture
  must consider other fault tolerance issues
  generic errors, common mode faults,
  near-coincidence faults and dissimilarity.

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ATA 27 Flight Controls

• Electric signal command hydraulic actuation

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ATA 27 Flight Controls

• Electric signal command hydraulic actuation

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ATA 27 Flight Controls

• Electric signal command hydraulic actuation

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ATA 27 Flight Controls

• Electric signal command hydraulic actuation

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ATA 27 Flight Controls
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ATA 27 Flight Controls

• Electric signal command ElectroHydrostatic
  Actuations (EHAs)