Aeronautics and astronautics – Aircraft control – Automatic
Patent
1999-09-07
2000-12-12
Barefoot, Galen L.
Aeronautics and astronautics
Aircraft control
Automatic
B64C 1316
Patent
active
061586951
ABSTRACT:
A method of providing speed protection to a neutrally-stable aircraft including the calculation of at least one of a stall protection signal and an overspeed protection signal. The aircraft includes a pitch control system having a command pitch signal received from pilot input to a control column. The protection signal is provided to the pitch control system to limit the commanded pitch signal during flight. The calculation of a stall protection signal includes differencing the aircraft's current airspeed with a reference speed and multiplying the difference by a scaling factor that corresponds to the force required by the pilot to move the control column. The calculation of an overspeed protection signal includes calculating a first signal based on airspeed, calculating a second signal based on Mach, selecting the large of the two signal and passing it through a limiter. The limiter is a function of roll attitude and corresponds to the force required by the pilot to move the control column. Also provided is a method of calculating a flare compensation signal to emulate ground effects encountered by an aircraft while executing a landing. The flare compensation signal is determined using a table of gear heights versus flare compensation amounts. The flare compensation signal is limited to a value between zero and a positive upper limit.
REFERENCES:
patent: 3345018 (1967-10-01), Chanak et al.
patent: 3911345 (1975-10-01), Totten
patent: 4261537 (1981-04-01), Tisdale et al.
patent: 4676460 (1987-06-01), Hagy et al.
patent: 4767085 (1988-08-01), Boudreau et al.
patent: 4849900 (1989-07-01), Blight et al.
patent: 4855738 (1989-08-01), Greene
patent: 5016177 (1991-05-01), Lambregts
patent: 5020747 (1991-06-01), Orgun et al.
patent: 5136518 (1992-08-01), Glover
patent: 5225829 (1993-07-01), Bateman
patent: 5590853 (1997-01-01), Greene
patent: 5695157 (1997-12-01), Coirier et al.
patent: 5803408 (1998-09-01), Gast
patent: 5823479 (1998-10-01), Nield et al.
patent: 5836546 (1998-11-01), Gast
A320 Primary Flight Control Flight Crew Operating Manual Description, date unknown, 6 pp.
Airbus Industrie, "Fly by Wire A300 Aircraft 3 Demonstration," Ref. No. AI/EC, No. 048/86, Jun. 1986, 25 pp.
Airbus Industrie, "The New Generation," Brochure, Ref. No. AI/EV-T 474.0338 BS, Issue 2, Dec. 1992, 60 pp.
Airbus Industrie Engineering Directorate Flight Division, "A320 Fly by Wire and Handling Qualities," 5th Performance and Operations Conference, May 1988, 13 pp.
Blight et al., "Control Law Synthesis for an Airplane with Relaxed Static Stability," Journal of Guidance, Control and Dynamics, vol. 9, No. 5, Sep.-Oct. 1986, pp. 546-554.
Corps, S.G., "Airbus A320 Side Stick and Fly By Wire--An Update," SAE Technical Paper Series, No. 861801, Aerospace Technology Conference and Exposition, Oct. 1986, 13 pp.
Droste, C.S., et al,. "The General Dynamics Case Study on the F-16 Fly-By-Wire Flight Control System," AIAA Professional Study Series, date unknown, 3 pp.
Hughes, D., "Extensive MD-11 Automation Assists Pilot, Cuts Workload," Aviation week & Space Technology, Oct. 22, 1990, 9 pp.
Mooij, H.A., et al., "Flight Test of Stick Force Stability in Attitude-Stabilized Aircraft," J. Aircraft, vol. 15, No. 9, Sep. 1978, pp. 562-566.
Tobie, H.N., et al., "A New Longitudinal Handling Qualities Criterion," The Boeing Company, date unknown, 7 pp.
Wagner, G.A., "What Makes the A320 Different?" Pilot, Oct. 1988, pp. 24-32.
Anderson Dorr M.
Bleeg Robert J.
Breuhaus Richard S.
Coleman Edward E.
Evans Monte R.
Barefoot Galen L.
The Boeing Company
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