GB757891A - Improvements in or relating to control device for airplane - Google Patents

Improvements in or relating to control device for airplane

Info

Publication number
GB757891A
GB757891A GB26727/52A GB2672752A GB757891A GB 757891 A GB757891 A GB 757891A GB 26727/52 A GB26727/52 A GB 26727/52A GB 2672752 A GB2672752 A GB 2672752A GB 757891 A GB757891 A GB 757891A
Authority
GB
United Kingdom
Prior art keywords
gust
wing
signal
flap
bridge circuit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB26727/52A
Inventor
John L Atwood
Carroll G Gordon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
North American Aviation Corp
Original Assignee
North American Aviation Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by North American Aviation Corp filed Critical North American Aviation Corp
Priority to GB26727/52A priority Critical patent/GB757891A/en
Publication of GB757891A publication Critical patent/GB757891A/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05DSYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D1/00Control of position, course, altitude or attitude of land, water, air or space vehicles, e.g. using automatic pilots
    • G05D1/04Control of altitude or depth
    • G05D1/06Rate of change of altitude or depth
    • G05D1/0607Rate of change of altitude or depth specially adapted for aircraft
    • G05D1/0615Rate of change of altitude or depth specially adapted for aircraft to counteract a perturbation, e.g. gust of wind
    • G05D1/0623Rate of change of altitude or depth specially adapted for aircraft to counteract a perturbation, e.g. gust of wind by acting on the pitch

Landscapes

  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

757,891. Automatic steering control systems. NORTH AMERICAN AVIATION, Inc. Oct. 24, 1952, No. 26727/52. Class 38 (4). [Also in Group XXIX] In an aircraft control system vertical gusts produce an electrical signal which is utilized to change wing lift to counter the gust, the electrical signal being modified by a further electrical signal dependent on the position of the wing lift changing means. Several forms of detector producing an electric signal dependent in sense and magnitude on the sense and magnitude of gust perpendicular to the path of travel are described. In one form, Fig. 8, a casing 1b, carried by a boom B projecting forwardly of the aircraft wing, contains upper and lower openings 32, 33 leading to pipes 31, 34 associated with a bellows 25 so that difference of pressure due to a vertical component of airflow operates the rotor of a variable inductive device 30 to produce the gust signal. To neutralize the effect of changes of attitude due to persistent effects such as prevailing winds or change of airspeed, casing 1b carries a vane 2b and is pivoted to boom B by means associated with damping dashpots (not shown) so that the casing ultimately sets itself in a neutral position. In a modified form upper and lower openings are associated with each side of a flexible diaphragm 64, Fig. 2, which forms with fixed plates 62, 63 a differential condenser producing the gust signal by unbalance of a bridge circuit. In another form a horizontal vane is mounted on booms projecting forwardly of the wing and strain gauges associated with upper and lower surfaces of each boom are connected to form a bridge circuit unbalance of which produces a gust signal. In yet another form temperaturevariable resistance wires carrying current and mounted on upper and lower surfaces of the wing are connected in a bridge circuit unbalance of which, due to unequal cooling on a gust, produces a gust signal. A gust signal produced by the first form of detector described above is amplified and controls one or other of two electromagnetically operated brakes so that a continuously running electric motor associated with planetary gearing and a flywheel adjusts a wing flap in the appropriate direction to counter a gust. Follow-up is provided by feedback to the amplifier from a variable inductive device operated by the flap. An electromagnetically controlled hydraulic servomotor may alternatively control the flap. Fig. 2 shows the differential condenser type of gust detector associated with resistors 69, 70 to form a bridge circuit any gust signal from which is amplified at 71, 73 and 78 to energize the appropriate field winding 80, 81 of an amplidyne generator 82 so that motors 83, 84 adjust a trimming tab 79 and hence a wing flap 74 in the appropriate direction to counter the gust. Follow-up is provided by feedback to amplifier 71 from a potentiometer 75 operated by flap 74. Differential components of the gust signal and the positional error signal are derived at 87 and 93 respectively and injected into amplifier 78. In this arrangement the effect of change of attitude due to change of airspeed is compensated by an airspeed responsive bellows 128 adjusting a reactance 129. Gusts may be countered by adjustment of wing lift by spoilers or by boundary layer control involving control of an air supply to a wing slot. The Specification refers to a plurality of gust detectors each controlling a plurality of units, which may be of different types, adjusting wing lift. Adjustment of tail plane lift may be effected in addition.
GB26727/52A 1952-10-24 1952-10-24 Improvements in or relating to control device for airplane Expired GB757891A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB26727/52A GB757891A (en) 1952-10-24 1952-10-24 Improvements in or relating to control device for airplane

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB26727/52A GB757891A (en) 1952-10-24 1952-10-24 Improvements in or relating to control device for airplane

Publications (1)

Publication Number Publication Date
GB757891A true GB757891A (en) 1956-09-26

Family

ID=10248283

Family Applications (1)

Application Number Title Priority Date Filing Date
GB26727/52A Expired GB757891A (en) 1952-10-24 1952-10-24 Improvements in or relating to control device for airplane

Country Status (1)

Country Link
GB (1) GB757891A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2559123A1 (en) * 1984-02-03 1985-08-09 Hirsch Rene Method and device for compensating for gusts experienced by an aircraft in flight

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2559123A1 (en) * 1984-02-03 1985-08-09 Hirsch Rene Method and device for compensating for gusts experienced by an aircraft in flight

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