EP0371213A1 - Linearantrieb zur Antennenausrichtung, insbesondere für Weltraumanwendungen - Google Patents

Linearantrieb zur Antennenausrichtung, insbesondere für Weltraumanwendungen Download PDF

Info

Publication number
EP0371213A1
EP0371213A1 EP89116639A EP89116639A EP0371213A1 EP 0371213 A1 EP0371213 A1 EP 0371213A1 EP 89116639 A EP89116639 A EP 89116639A EP 89116639 A EP89116639 A EP 89116639A EP 0371213 A1 EP0371213 A1 EP 0371213A1
Authority
EP
European Patent Office
Prior art keywords
jack
linear actuator
gear
actuator
screw
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.)
Granted
Application number
EP89116639A
Other languages
English (en)
French (fr)
Other versions
EP0371213B1 (de
Inventor
Paolo Marsili
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.)
Alenia Spazio SpA
Original Assignee
Selenia Spazio SpA
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 Selenia Spazio SpA filed Critical Selenia Spazio SpA
Publication of EP0371213A1 publication Critical patent/EP0371213A1/de
Application granted granted Critical
Publication of EP0371213B1 publication Critical patent/EP0371213B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/27—Adaptation for use in or on movable bodies
    • H01Q1/28—Adaptation for use in or on aircraft, missiles, satellites, or balloons
    • H01Q1/288—Satellite antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/125—Means for positioning

Definitions

  • linear actuator in its best application used within a satellite-borne antenna system, achieving fine pointing of an antenna determining by linear displacement of one of its points, rotation of the antenna around a hinge.
  • the actuator consists basically (figure 2) of a rotating motor 8, a screw gear 11 connected to the motor shaft, a screw jack 13 connected to the gear to achieve linear motion.
  • Figure 1 shows how the linear actuator 1 is fitted. It is connected to a supporting arm 2 and it transmits linear motion to a reflector 3 hinged at point 6.
  • the reflector (or paraboloid) shown in Figure 1 is shown in take-off configuration connected to satellite body 5 by means of frangible connectors 4. Upon completion of the launch phase, the reflector is freed from connectors 4 and by rotating arm 2 around hinge 7, it is moved to its operating configuration.
  • the invention pertains to the electromechanical field, more specifically to that for satellite-borne antenna pointing.
  • Defective pointing of an antenna invalidates the mission of a telecommunication satellite, making void the scope for which the satellite is placed in orbit.
  • the pointing mechanism must satisfy high accuracy, reliability, continuous operation for several years, yet have an extremely low weight.
  • the invention is meant to provide an optimum solution to these requirements, in terms of technologies (a and b) of materials use and selection and in terms of actuator design within the satellite system (c and d), achieving essential performance such as isolation at take off and high accuracy during operation.
  • Rolling elements are not suitable for the operating cycle required for antenna pointing; metal to metal contact with concentrated loads and limited displacements in both directions over one same area, destroy the lubricating film required between metal parts.
  • the metal screw acts as a shaping former, while the jack screw adapts to it by expanding its contact area; - no deformation of the jack screw is required by relative displacement, either large or small; - no lubricant is required because of the self lubricating properties of teflon; - the very low friction factor keeps torque required low; - due to the low friction, low specific load and extended contact area, good dimensional stability and low wear characteristics are achieved.
  • the innovations at point b are due to the jack screw soft material.
  • Such material is contained within a metal container which acts as a cage with a sufficiently tight grid to guide the soft material geometry so that the stress on the coupling surfaces with the screw gear is kept uniform.
  • the guiding function of the metal cage reduces to a minimum the thermal expansion of teflon, which is normally high.
  • Figure 4 shows, for illustrative and not limiting purposes, an example of implementation, where the jack screw includes the metal casing in figure 4, the threaded insert of figure 5 and the insert of figure 6, all made of teflon.
  • the jack screw configuration provides for axial connection between metal casing and jack screw insert by means of a deep thread with a rectangular profile.
  • the radial connection is provided by pins, parallel to the jack screw axis, inserted into holes 24 (fig. 5), which cross the metal casing thread and the corresponding thread within the teflon insert.
  • the radial connection is improved by reducing the circumferential fricton of the teflon insert by means of cuts 25 (fig. 5) which partially interrupt the circumferential continuity of the insert itself. This characteristic allows to reduce the radial shrinkage which arises at low temperature.
  • the proposed solution offers protection against take off loads by keeping the motion transmission gear open at take off and closing it once in operation. Opening is maintained by frangible supports 4 (fig. 1) which determine the position of the paraboloid by connecting it to the satellite body at take off.
  • a coaxial guide between flange and jack screw gear follows displacement and an axial end of run stops determines displacement transmission during operation.
  • the protective device consists therefore of the coaxial rail with axial end of run stop and of the pre-loading device, which produces the displacement and maintains contact of the axial stop to achieve motion transmission.
  • the preloading system shown in Fig. 3, consists of a preloaded spring 20, struts 21 and levers 22.
  • this preloading system performs the function of eliminating any backlash, producing further advantages compared to previous solutions: - less torque required of the motor; - simplification of the jack screw gear design, which is made in one single section; - recovery of backlash of the entire kinematic chain.
  • the linear actuator subject of this invention, as already mentioned, provides the performance required for space application with simple build, low cost and high reliability.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Remote Sensing (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transmission Devices (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
EP89116639A 1988-09-08 1989-09-08 Linearantrieb zur Antennenausrichtung, insbesondere für Weltraumanwendungen Expired - Lifetime EP0371213B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT8848330A IT1224879B (it) 1988-09-08 1988-09-08 Attuatore lineare per il puntamento d'antenna, particolarmente idoneo per applicazioni spaziali
IT4833088 1988-09-08

Publications (2)

Publication Number Publication Date
EP0371213A1 true EP0371213A1 (de) 1990-06-06
EP0371213B1 EP0371213B1 (de) 1995-06-07

Family

ID=11265938

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89116639A Expired - Lifetime EP0371213B1 (de) 1988-09-08 1989-09-08 Linearantrieb zur Antennenausrichtung, insbesondere für Weltraumanwendungen

Country Status (4)

Country Link
EP (1) EP0371213B1 (de)
DE (1) DE68922968T2 (de)
ES (1) ES2076180T3 (de)
IT (1) IT1224879B (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2039164A2 (es) * 1992-01-30 1993-08-16 Sener Ing & Sist Mecanismo de ajuste de alta precision para el posicionado correcto de estructuras deformables.
FR2712111A1 (fr) * 1993-11-03 1995-05-12 Aerospatiale Dispositif pour le positionnement d'un objet par rapport à une structure fixe.
EP0655796A1 (de) * 1993-11-30 1995-05-31 ROLTRA MORSE S.p.A. Linearer Stellantrieb
EP2674360A1 (de) * 2012-06-13 2013-12-18 Claverham Limited Trocken geschmierter linearer Aktuator für Rotorsteuerung im Rotorblatt
US9440738B2 (en) 2012-06-13 2016-09-13 Claverham Ltd. Dry lubricated rotary actuator for in blade rotor control
CN115127643A (zh) * 2022-06-08 2022-09-30 安徽省阜阳市勘测院有限公司 一种勘查用钻孔水位测量装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19953934C2 (de) * 1999-11-10 2002-03-21 Astrium Gmbh Linearantrieb für Raumfahrtanwendungen

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2204448A1 (de) * 1972-01-31 1973-08-09 Rohde & Schwarz Vorrichtung zum biaxialen verschwenken des reflektors einer richtantenne, insbesondere einer mobilen satellitenverfolgungsanlage
EP0043772A1 (de) * 1980-07-09 1982-01-13 AEROSPATIALE Société Nationale Industrielle Servosteuerverfahren und -system für eine bewegbare, an einem Raumfahrzeug angebrachte Trägerplatte
FR2502404A1 (fr) * 1981-03-20 1982-09-24 Matra Dispositif de montage articule, notamment d'un sous-ensemble de satellite artificiel
GB2127624A (en) * 1982-09-22 1984-04-11 Rca Corp Antenna mounting system
US4652887A (en) * 1983-12-16 1987-03-24 The General Electric Company P.L.C. Antenna drive
CA1225459A (en) * 1984-09-10 1987-08-11 Ardiel Electronics Ltd. Satellite dish

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2204448A1 (de) * 1972-01-31 1973-08-09 Rohde & Schwarz Vorrichtung zum biaxialen verschwenken des reflektors einer richtantenne, insbesondere einer mobilen satellitenverfolgungsanlage
EP0043772A1 (de) * 1980-07-09 1982-01-13 AEROSPATIALE Société Nationale Industrielle Servosteuerverfahren und -system für eine bewegbare, an einem Raumfahrzeug angebrachte Trägerplatte
FR2502404A1 (fr) * 1981-03-20 1982-09-24 Matra Dispositif de montage articule, notamment d'un sous-ensemble de satellite artificiel
GB2127624A (en) * 1982-09-22 1984-04-11 Rca Corp Antenna mounting system
US4652887A (en) * 1983-12-16 1987-03-24 The General Electric Company P.L.C. Antenna drive
CA1225459A (en) * 1984-09-10 1987-08-11 Ardiel Electronics Ltd. Satellite dish

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 9, no. 197 (E-335)[1920], 14th August 1985; & JP-A-60 62 205 (NIPPON DENKI K.K.) 10-04-1985 *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2039164A2 (es) * 1992-01-30 1993-08-16 Sener Ing & Sist Mecanismo de ajuste de alta precision para el posicionado correcto de estructuras deformables.
FR2712111A1 (fr) * 1993-11-03 1995-05-12 Aerospatiale Dispositif pour le positionnement d'un objet par rapport à une structure fixe.
EP0655796A1 (de) * 1993-11-30 1995-05-31 ROLTRA MORSE S.p.A. Linearer Stellantrieb
EP2674360A1 (de) * 2012-06-13 2013-12-18 Claverham Limited Trocken geschmierter linearer Aktuator für Rotorsteuerung im Rotorblatt
RU2549735C2 (ru) * 2012-06-13 2015-04-27 Клейверхэм Лимитед Узел лопасти несущего винта, воздушное судно с несущим винтом и приводная система закрылка лопасти несущего винта
US9278756B2 (en) 2012-06-13 2016-03-08 Claverham Ltd Dry lubricated linear actuator for in blade rotor control
US9440738B2 (en) 2012-06-13 2016-09-13 Claverham Ltd. Dry lubricated rotary actuator for in blade rotor control
CN115127643A (zh) * 2022-06-08 2022-09-30 安徽省阜阳市勘测院有限公司 一种勘查用钻孔水位测量装置

Also Published As

Publication number Publication date
ES2076180T3 (es) 1995-11-01
IT1224879B (it) 1990-10-24
EP0371213B1 (de) 1995-06-07
IT8848330A0 (it) 1988-09-08
DE68922968D1 (de) 1995-07-13
DE68922968T2 (de) 1996-03-21

Similar Documents

Publication Publication Date Title
EP0371213B1 (de) Linearantrieb zur Antennenausrichtung, insbesondere für Weltraumanwendungen
US5674027A (en) Exaggerated actuation and bearing-free rotational mobility in smart hinges
US5244170A (en) Passive nonlinear interface strut (PNIS)
US6389915B1 (en) Dual load path ball screw with rod end swivel
US5030016A (en) Process and apparatus for the release of a prestress initially applied to a mechanism such as a bearing on board a space vehicle
US10488167B2 (en) Wedge-based heat switch using temperature activated phase transition material
US20050084325A1 (en) High reliability precision latch
CN107284692B (zh) 一种适用于空间平板天线的热解耦可展开桁架系统
US4702439A (en) Support for thermally expanding conical heatshield
EP3628594B1 (de) Gelenk zur verbindung von flugzeugstrukturen
EP3534038B1 (de) Aktuator mit doppelter stange und exzenterkupplung
EP1377729B1 (de) Turbinenanlage, insbesondere dampfturbinenanlage
RU2083860C1 (ru) Турбонасосный агрегат
CN211202632U (zh) 用于空间运动部件轴系游动端的轴承组件
US5261632A (en) Rotary mechanism of a space vehicle having an integrated stacking system
Falkner et al. The development of an ion thruster alignment mechanism (ITAM) for ARTEMIS
Lince et al. Solid lubrication for spacecraft mechanisms
RU2098695C1 (ru) Планетарная роликовинтовая передача
Jetter SNAP 10A REFLECTOR ASSEMBLY DESIGN DESCRIPTION.
CN110579856B (zh) 用于大视场望远镜的解耦装置
EP4186648A2 (de) Drehmechanismus und roboter
Kumar et al. Dual gimbal antenna mechanism
WO2007101305A1 (en) Low temperature heatsinking system
CN116812175A (zh) 一种星载紧凑型高精度高温度适应性二维指向机构
JPH046883A (ja) クライオスタット

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE ES FR GB NL SE

17P Request for examination filed

Effective date: 19901206

17Q First examination report despatched

Effective date: 19930310

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES FR GB NL SE

ET Fr: translation filed
REF Corresponds to:

Ref document number: 68922968

Country of ref document: DE

Date of ref document: 19950713

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2076180

Country of ref document: ES

Kind code of ref document: T3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

REG Reference to a national code

Ref country code: ES

Ref legal event code: PC2A

NLS Nl: assignments of ep-patents

Owner name: FINMECCANICA S.P.A.

NLT1 Nl: modifications of names registered in virtue of documents presented to the patent office pursuant to art. 16 a, paragraph 1

Owner name: ALENIA SPAZIO S.P.A.

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

NLS Nl: assignments of ep-patents

Owner name: ALENIA SPAZIO S.P.A.

REG Reference to a national code

Ref country code: FR

Ref legal event code: RM

Ref country code: FR

Ref legal event code: TP

REG Reference to a national code

Ref country code: ES

Ref legal event code: PC2A

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

NLS Nl: assignments of ep-patents

Owner name: LABEN S.P.A.

Effective date: 20050712

NLT1 Nl: modifications of names registered in virtue of documents presented to the patent office pursuant to art. 16 a, paragraph 1

Owner name: ALENIA SPAZIO S.P.A.

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

Ref country code: FR

Ref legal event code: CA

Ref country code: FR

Ref legal event code: CD

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

NLS Nl: assignments of ep-patents

Owner name: FINMECCANICA S.P.A.

Effective date: 20050920

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

REG Reference to a national code

Ref country code: ES

Ref legal event code: PC2A

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20060831

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20060903

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20060906

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20060908

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20061023

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20060906

Year of fee payment: 18

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070909

EUG Se: european patent has lapsed
GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20070908

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080401

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20080401

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080401

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20080531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20071001

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070908

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20070910

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070910