EP0033669B1 - Dispositif de servo-commande et son application aux appareils de commande de vol des aéronefs - Google Patents

Dispositif de servo-commande et son application aux appareils de commande de vol des aéronefs Download PDF

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Publication number
EP0033669B1
EP0033669B1 EP81400012A EP81400012A EP0033669B1 EP 0033669 B1 EP0033669 B1 EP 0033669B1 EP 81400012 A EP81400012 A EP 81400012A EP 81400012 A EP81400012 A EP 81400012A EP 0033669 B1 EP0033669 B1 EP 0033669B1
Authority
EP
European Patent Office
Prior art keywords
lever
support
aircraft
servo
flight control
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
EP81400012A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0033669A1 (fr
Inventor
Gérard Lucien Devaud
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.)
Societe dApplications des Machines Motrices SAMM SA
Original Assignee
Societe dApplications des Machines Motrices SAMM SA
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 Societe dApplications des Machines Motrices SAMM SA filed Critical Societe dApplications des Machines Motrices SAMM SA
Publication of EP0033669A1 publication Critical patent/EP0033669A1/fr
Application granted granted Critical
Publication of EP0033669B1 publication Critical patent/EP0033669B1/fr
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B9/00—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member
    • F15B9/02—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type
    • F15B9/08—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type controlled by valves affecting the fluid feed or the fluid outlet of the servomotor
    • F15B9/12—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type controlled by valves affecting the fluid feed or the fluid outlet of the servomotor in which both the controlling element and the servomotor control the same member influencing a fluid passage and are connected to that member by means of a differential gearing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/10—Special arrangements for operating the actuated device with or without using fluid pressure, e.g. for emergency use
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems

Definitions

  • the present invention relates to a servo-control device of the type comprising a distributor body movable relative to guide members and a distribution slide mounted in this body and connected to a control lever which is articulated around a axis fixed relative to the body, this axis being carried by a support attached to the body.
  • GB-A-724 750 shows a device of this type.
  • the invention relates in particular to devices of this type used for flight control of aircraft.
  • the object of the invention is to take advantage of the use of an articulation support attached to the body, as described in the aforementioned patent GB-A-724,750, in order to obtain an easier, less expensive and more reliable adjustment. from the neutral position of the drawer.
  • the invention relates to a servo-control device of the aforementioned type, characterized in that means are provided for adjusting the position of the support relative to the body.
  • the adjustment of the neutral position of the dispensing drawer can be very simply obtained by adjusting the position of the support relative to the body.
  • a set of shims forming spacers is used for this purpose, the shim of appropriate thickness being interposed between the support and the body. No untimely adjustment is then possible.
  • the invention also relates to a flight control apparatus for an aircraft which comprises a servo-control device as defined above and further comprising a member for locking the lever with respect to the body which is biased by a spring. towards its locking position and adapted to be moved away from this position by the pressure of the actuating fluid of the device.
  • the servo-control device shown in the drawing comprises a distributor body 1 of constant cross section pierced right through with three parallel longitudinal cylindrical openings, namely a light 2 in which is mounted a distribution drawer 3 with jacket 3a, a light 4 forming the body of a single-acting cylinder 5, and a light 6 forming the body of a double-acting cylinder 7.
  • Fluid circulation conduits not shown, appropriately connect the lights 2, 4 and 6 between them, to a source of pressurized hydraulic fluid and to a tarpaulin (not shown).
  • the body 1 is produced by machining a blank obtained as follows; a profile is spun so as to present over its entire length the openings 2, 4 and 6, and is then cut to form a series of blanks.
  • Each of the lights 2, 4 and 6 has at one end (right end in the drawing) a solid plug 8 and, at its opposite end, a plug 9 provided with a central orifice.
  • the actuator rod of the drawer 3 passes through the plug 9 of the light seal 2.
  • the piston rods of the jack 5 and of the jack 7 pass through the plug 9 of the lights 4 and 6 respectively.
  • the piston rod of the jack 5 carries at its free end a frustoconical lock 10 and is urged to extend by a helical spring 11 compressed between the piston of this jack and the corresponding plug 8.
  • an oblique support or fitting 12 in the form of a yoke carrying a transverse axis 13 at its free end.
  • the foot 14 of this support 12 in the form of a plate, is fixed to the body 1 by screws 15, with the interposition of a wedge or spacer 16 of constant thickness.
  • a control lever 17 is articulated by one end on the axis 13 and by its other end to an actuation linkage (not shown).
  • the freedom of rotation of the lever 17 is limited to a low angular value by a stud 18 of the support 12 received with a slight play in a notch 19 of the lever.
  • An intermediate point of the lever 17 is connected by a connecting rod 20 to a yoke 21 carried by the free end of the rod of the drawer 3, and another intermediate point of this lever has a conical recess 22 conjugated with the latch 10 and located in the cylinder axis 5.
  • the latch 10 When the latch 10 enters the recess 22, it blocks the lever 17 in a position where the stud 18 is centered in the notch 19.
  • the replacement of the shim 16 by a similar shim but of different thickness thus causes movement of translation of the lever 17 relative to the body 1, the amplitude of which is equal to the difference in thickness between the two wedges.
  • Choosing an appropriate shim from a set of shims of various thicknesses is therefore sufficient to correctly adjust the neutral position of the drawer 3 relative to the jacket 3a in which it slides. This adjustment is very simple and, once made, cannot be inadvertently modify.
  • the piston rod of the jack 7 is for example articulated at a fixed point 23 at the end of the body 1, so that the latter is movable in translation along this rod.
  • the body 1 is also connected to a member to be controlled, for example to a shaft 24 by a crank arm 25 keyed onto this shaft.
  • the chamber of the jack 5 opposite the spring 11 is connected to the source of pressurized fluid.
  • the pressure causes the bolt 10 to be withdrawn, and therefore the lever 17 to be released, as soon as it reaches a value much lower than the value which causes the slide 3 to move in order to move the body 1 in the desired direction. .
  • the spring 11 pushes the latch 10, which blocks the lever 17 in the position shown and makes the latter integral with the body 1. Any action exerted on the lever 17 then directly causes the displacement of the body 1 in the same direction.
  • This dual possibility of controlling the body 1, assisted and direct makes the device perfectly safe and allows its use for controlling vital elements of aircraft, for example the main rotor of a helicopter or the control surface of a light aircraft. .
  • the device of the invention may also include a rotary and not a sliding drawer, and the body 1 can be guided and connected to the member to be controlled by means other than those shown.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Mechanical Control Devices (AREA)
  • Transmission Devices (AREA)
  • Servomotors (AREA)
  • Actuator (AREA)
EP81400012A 1980-01-25 1981-01-07 Dispositif de servo-commande et son application aux appareils de commande de vol des aéronefs Expired EP0033669B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8001591 1980-01-25
FR8001591A FR2474438A1 (fr) 1980-01-25 1980-01-25 Dispositif de servo-commande et son application aux appareils de commande de vol des aeronefs

Publications (2)

Publication Number Publication Date
EP0033669A1 EP0033669A1 (fr) 1981-08-12
EP0033669B1 true EP0033669B1 (fr) 1984-04-11

Family

ID=9237860

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81400012A Expired EP0033669B1 (fr) 1980-01-25 1981-01-07 Dispositif de servo-commande et son application aux appareils de commande de vol des aéronefs

Country Status (4)

Country Link
US (1) US4413547A (enExample)
EP (1) EP0033669B1 (enExample)
DE (1) DE3163001D1 (enExample)
FR (1) FR2474438A1 (enExample)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IN159589B (enExample) * 1982-08-16 1987-05-30 Rockwell International Corp
FR2684953B1 (fr) * 1991-12-11 1994-04-01 Aerospatiale Ste Nationale Indle Dispositif a vulnerabilite reduite pour la commande d'un rotor d'helicoptere par plateaux cycliques.

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB724750A (en) * 1951-09-10 1955-02-23 Automotive Prod Co Ltd Improvements in or relating to fluid pressure servo-motor systems
FR2090281A1 (enExample) * 1970-05-26 1972-01-14 Messerschmitt Boelkow Blohm

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US284A (en) * 1837-07-19 White paint
US3122972A (en) * 1964-03-03 rasmussen
US2943606A (en) * 1956-12-03 1960-07-05 Cleveland Pneumatic Ind Inc Servo actuator adapted to be operated by a plurality of control signals
US3158068A (en) * 1961-12-28 1964-11-24 Conair Hydraulic actuator and control unit
US3295420A (en) * 1964-12-14 1967-01-03 Boeing Co Hydraulic actuator
GB1328204A (en) * 1969-10-15 1973-08-30 Automotive Prod Co Ltd Fluid pressure control systems

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB724750A (en) * 1951-09-10 1955-02-23 Automotive Prod Co Ltd Improvements in or relating to fluid pressure servo-motor systems
FR2090281A1 (enExample) * 1970-05-26 1972-01-14 Messerschmitt Boelkow Blohm

Also Published As

Publication number Publication date
FR2474438A1 (fr) 1981-07-31
DE3163001D1 (en) 1984-05-17
FR2474438B1 (enExample) 1984-04-27
EP0033669A1 (fr) 1981-08-12
US4413547A (en) 1983-11-08

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