China Airlines Flight 006 damaged by going outside its flight envelope to gain control after a drop of 3,000 m in 20 seconds
Flight envelope protection is a human machine interface extension of an aircraft's control system that prevents the pilot of an aircraft from making control commands that would force the aircraft to exceed its structural and aerodynamic operating limits.[1][2][3] It is used in some form in all modern commercial fly-by-wire aircraft.[4] The professed advantage of flight envelope protection systems is that they restrict a pilot's excessive control inputs, whether in surprise reaction to emergencies or otherwise, from translating into excessive flight control surface movements. Notionally, this allows pilots to react quickly to an emergency while blunting the effect of an excessive control input resulting from "startle," by electronically limiting excessive control surface movements that could over-stress the airframe and endanger the safety of the aircraft.[5][6]
In practice, these limitations have sometimes resulted in unintended human factors errors and accidents of their own.
^Pratt, R. (2000). Flight control systems: practical issues in design and implementation. Institution of Electrical Engineers. ISBN 978-0-85296-766-9
^Abzug MJ, Larrabee EE. (2002). Airplane stability and control: a history of the technologies that made aviation possible. Cambridge University Press, ISBN 978-0-521-80992-4
^Risukhin V. (2001). Controlling Pilot Error: Automation. McGraw-Hill Professional. ISBN 978-0-07-137320-3
^North, David. (2000) "Finding Common Ground in Envelope Protection Systems". Aviation Week & Space Technology, Aug 28, pp. 66–68.
^Waldrop MM. (1989). Flying the Electric Skies. Science, 244: 1532–1534. JSTOR 1704109
^Alizart R. Fulford GA. (1989) Electric Airliners. Science, 245: 581–583. JSTOR 1704444
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specific portion of the flightenvelope (flaps up, high angle of attack, manual flight). MCAS was intended to mimic the flight behavior of the previous...
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instrumentation, navigation, radar, monitoring, and communications systems. The flightenvelope of an aircraft refers to its approved design capabilities in terms...
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