EP3050158B1 - Segmented structure in particular for antenna reflectors of satellites - Google Patents

Segmented structure in particular for antenna reflectors of satellites Download PDF

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Publication number
EP3050158B1
EP3050158B1 EP14784266.0A EP14784266A EP3050158B1 EP 3050158 B1 EP3050158 B1 EP 3050158B1 EP 14784266 A EP14784266 A EP 14784266A EP 3050158 B1 EP3050158 B1 EP 3050158B1
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European Patent Office
Prior art keywords
rotation
panel
main panel
internal
segmented structure
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EP14784266.0A
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German (de)
French (fr)
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EP3050158A1 (en
Inventor
Francis GRANGERAT
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ArianeGroup SAS
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ArianeGroup SAS
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/14Reflecting surfaces; Equivalent structures
    • H01Q15/16Reflecting surfaces; Equivalent structures curved in two dimensions, e.g. paraboloidal
    • H01Q15/161Collapsible reflectors
    • H01Q15/162Collapsible reflectors composed of a plurality of rigid panels
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/27Adaptation for use in or on movable bodies
    • H01Q1/28Adaptation for use in or on aircraft, missiles, satellites, or balloons
    • H01Q1/288Satellite antennas
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/14Reflecting surfaces; Equivalent structures
    • H01Q15/16Reflecting surfaces; Equivalent structures curved in two dimensions, e.g. paraboloidal
    • H01Q15/161Collapsible reflectors

Definitions

  • the present invention relates to a segmented structure.
  • This segmented structure comprises at least two panels linked together and intended to be deployed in space.
  • an antenna reflector generally comprises a rigid structure (called a hull) provided with a reflecting surface and reinforcement means at the rear of this surface, which participate in maintaining the hull and in the connection with the satellite.
  • the large dimension of the hull of such a reflector poses problems of bulk when sending into space a satellite provided with such a reflector using a space launcher.
  • a segmented structure is provided, provided with several panels, in particular a three-panel structure comprising a central panel and two end panels.
  • each end panel can therefore take a storage position for transport in the space launcher and a deployed position when the satellite is in space.
  • JP 59-126305 JP 60-027203 and EP1043802 describe devices for deploying antenna reflectors.
  • each end panel can therefore take a storage position for transport in the space launcher and a deployed position when the satellite is in space.
  • the present invention relates to a segmented structure of a satellite antenna reflector, comprising at least two panels and a deployment device making it possible to achieve an efficient and advantageous deployment in space of these two panels.
  • the secondary panel of the segmented structure can be deployed efficiently and advantageously in space from the storage position to the deployed position, as specified below.
  • the external connection of the external segment to the rear face of the secondary panel is equipped with a flexible joint to ensure a degree of freedom.
  • said auxiliary rotation system comprises two motors, one of which is connected to the internal end of the internal segment of a first of said arms and is capable of subjecting it to rotation, and the other of which is connected to the internal end of the internal segment of the second of said arms and is capable of subjecting it to a rotation, these two motors being synchronized and controlled so as to generate rotations in opposite directions.
  • said single motor is a gear reducer with two inverted outputs, each output being provided with a pulley making it possible to transmit a rotation.
  • the present invention also relates to a method of deploying a segmented structure as mentioned above.
  • the segmented structure 1, illustrating the invention and shown schematically on the figure 1 in particular, is intended, more particularly although not exclusively, for a telecommunications satellite antenna reflector.
  • Such an antenna reflector generally comprises, when it is deployed in space, a rigid structure (called a shell) provided with a reflecting surface, as well as reinforcement and retention means (not shown) at the rear. of this structure, which participate in the maintenance of the hull and in the connection with the satellite.
  • this structure is of the segmented type, that is to say it is formed of several segments or panels.
  • one 3 of the secondary panels 3 and 4 is in the deployed position P2, and the other 4 of said secondary panels 3 and 4 is in the storage position P1.
  • connection to the rear face 2B of the main panel 2 is made by means of a structural element 23, preferably of planar shape, which is fixed to the rear face 2B and which serves as a support for the deployment devices 5 of the two secondary panels 3 and 4.
  • Such a deployment device 5 enables efficient and advantageous deployment of the secondary panel, with which it is associated, from the storage position P1 to the deployed position P2, as specified below.
  • the translation system 6 comprises a set 7 of two identical articulated arms 9A and 9B which are arranged symmetrically with respect to an axis XX of the segmented structure 1, in particular an axis of symmetry, as shown in FIG. figure 2 .
  • Each of said articulated arms 9A and 9B comprises an outer segment 10 and an inner segment 11 linked together by a pivot link 12, as shown in FIG. figure 3 .
  • the outer segment 10 of each of said arms 9A and 9B is linked by a pivot connection 13 to the rear face 3B of the secondary panel 3.
  • said translation system 6 further comprises an auxiliary rotation system 14, 15.
  • This auxiliary rotation system 14, 15 is linked to an internal end 11A of each of the internal segments 11 of the articulated arms 9A and 9B, and it acts directly on the internal ends 11A so as to generate a rotation at each of the two ends. internal 11A around an axis ⁇ .
  • the auxiliary rotation system 14, 15 generates rotations at the internal ends 11A of the two arms 5A and 5B in a synchronized manner and in opposite directions, so as to unfold or fold said assembly 7 of articulated arms, and this so that the assembly 7 has a rectilinear displacement along the axis XX.
  • the rotation (illustrated by an arrow E1 around the axis ⁇ on the figure 3 ) is generated by the auxiliary rotation system 14.
  • the rotations generated respectively on the two articulated arms 9A and 9B of the assembly 7 being reversed (in the direction of arrow E1 for 9B and in the opposite direction of arrow E2 for 9A, as shown for example on figure 13 ), and this in a synchronized manner, i.e. at the same speed, they generate a translation of the arm assembly 7 (and therefore of the deployment system 5), as illustrated for example by an arrow B1 on the figure 6 .
  • said auxiliary rotation system 14 comprises two motors 17 and 18 (for example of the stepping type).
  • One 17 of said motors 17 and 18 is connected to the internal end 11A of the internal segment 11 of a first arm 9B and is able to subject this internal segment 11 to a rotation.
  • the other 18 of said motors 17 and 18 is connected to the internal end 11A of the internal segment 11 of the second arm 9A and is also capable of subjecting this internal segment 11 to rotation.
  • Said motors 17 and 18, for example gear reducer servomotors are synchronized and controlled so as to generate rotations in opposite directions E1 and E2 around parallel ⁇ axes, each time via a usual transmission means 19.
  • Said first and second links 22A and 22B are driven by motor 20 so as to transmit rotations in opposite directions at the same speed.
  • the rotation system 8 (capable of generating the rotation of the translation system 6 around the main axis of rotation ⁇ ) can also be produced in different ways.
  • it is connected to the rear face 2A of the main panel 2 by means of the support element 23 of substantially planar shape.
  • said rotation system 8 comprises two coaxial motors 25 and 26 (along the axis ⁇ ) which act directly on the axis of rotation of each arm 9A and 9B. These motors 25 and 26 are synchronized and generate a rotation in the same direction, as illustrated by an arrow F1 on the figure 3 .
  • said rotation system 8 comprises a transmission shaft 27 which is linked to the ends of the arms 9A and 9B, so as to mechanically link these two arms 9A and 9B together.
  • This transmission shaft 27 is driven by a suitable motor 28, for example a screw jack, which is fixed to the support element 23. The translation of the jack causes the rotation of the transmission shaft 27.
  • the external connection of the external arm 10 to the rear face 3B of the secondary panel 3 is flexible, for example using an appropriate joint 29, so as to create a certain flexibility between the secondary panel 2 and the arm assembly 7, in particular to facilitate final positioning, shown in figure 8 and specified below.
  • the deployment device 5 also comprises means not shown (for example a central unit) for controlling the rotation systems 8, 14, 15.
  • segmented structure 1 can comprise usual means of maintaining (not shown) of the various panels 2, 3 and 4 in the storage position P1. These holding means are released before deployment, so that each deployment device 5 can implement the deployment specified below.
  • the same deployment method is implemented for the secondary panel 4 so as to finally obtain the fully deployed position of the segmented structure 1 of the figure 9 .
  • this rotation generates a translation in the direction shown by the arrow B2 on the figure 8 , allowing the secondary panel 3 to be brought into contact with the main panel 2.
  • the device 5 can also bring the segmented structure from the deployed position P2 to the stored position P1, if this turns out to be necessary, for example for a validation operation, by performing the aforementioned operations in the reverse order (d , c, b, a), with each operation (rotation, translation) carried out in reverse.
  • segmented structure 1 may include means, not shown, to allow precise final positioning between a secondary panel 3, 4 and the main panel 2 in the situation of figures 8 and 9 , as well as means for locking the panels in the fully deployed position of the segmented structure 1 of the figure 9 .

Description

La présente invention concerne une structure segmentée.The present invention relates to a segmented structure.

Cette structure segmentée comprend au moins deux panneaux liés ensemble et destinés à être déployés dans l'espace.This segmented structure comprises at least two panels linked together and intended to be deployed in space.

Bien que non exclusivement, la présente invention s'applique plus particulièrement à une structure segmentée faisant partie d'un réflecteur d'antenne de satellite de télécommunication, en particulier à un réflecteur d'antenne de grande dimension, fonctionnant dans des bandes de fréquence élevées. Un tel réflecteur d'antenne comprend généralement une structure rigide (appelée coque) pourvue d'une surface réfléchissante et des moyens de renfort à l'arrière de cette surface, qui participent au maintien de la coque et à la liaison avec le satellite.Although not exclusively, the present invention applies more particularly to a segmented structure forming part of an antenna reflector of a telecommunications satellite, in particular to an antenna reflector of large dimension, operating in high frequency bands. . Such an antenna reflector generally comprises a rigid structure (called a hull) provided with a reflecting surface and reinforcement means at the rear of this surface, which participate in maintaining the hull and in the connection with the satellite.

La grande dimension de la coque d'un tel réflecteur pose des problèmes d'encombrement lors de l'envoi dans l'espace d'un satellite pourvu d'un tel réflecteur à l'aide d'un lanceur spatial.The large dimension of the hull of such a reflector poses problems of bulk when sending into space a satellite provided with such a reflector using a space launcher.

Aussi, pour des réflecteurs rigides présentant des diamètres de plusieurs mètres, on prévoit une structure segmentée, pourvue de plusieurs panneaux, en particulier une structure à trois panneaux comprenant un panneau central et deux panneaux d'extrémité.Also, for rigid reflectors having diameters of several meters, a segmented structure is provided, provided with several panels, in particular a three-panel structure comprising a central panel and two end panels.

Cette structure segmentée comporte, de plus, un dispositif de déploiement par panneau d'extrémité, qui est apte à amener le panneau d'extrémité relativement au panneau principal :

  • soit dans une position de stockage, dans laquelle le panneau d'extrémité est superposé au panneau principal sur la face arrière de ce dernier, la face avant du panneau d'extrémité étant dirigée dans le même sens que la face avant du panneau principal ;
  • soit dans une position déployée, dans laquelle le panneau d'extrémité est positionné à côté et contre le panneau principal de manière à former un ensemble continu au moins sur leurs faces avant.
This segmented structure further comprises an end panel deployment device, which is able to bring the end panel relative to the main panel:
  • either in a storage position, in which the end panel is superimposed on the main panel on the rear face of the latter, the front face of the end panel being directed in the same direction as the front face of the main panel;
  • or in a deployed position, in which the end panel is positioned next to and against the main panel so as to form a continuous assembly at least on their front faces.

Dans une telle structure segmentée, chaque panneau d'extrémité peut donc prendre une position de stockage pour le transport dans le lanceur spatial et une position déployée lorsque le satellite se trouve dans l'espace.In such a segmented structure, each end panel can therefore take a storage position for transport in the space launcher and a deployed position when the satellite is in space.

Les documents JP 59-126305 JP 60-027203 et EP1043802 décrivent des dispositifs de déploiement de réflecteurs d'antenne.The documents JP 59-126305 JP 60-027203 and EP1043802 describe devices for deploying antenna reflectors.

Dans une telle structure segmentée, chaque panneau d'extrémité peut donc prendre une position de stockage pour le transport dans le lanceur spatial et une position déployée lorsque le satellite se trouve dans l'espace.In such a segmented structure, each end panel can therefore take a storage position for transport in the space launcher and a deployed position when the satellite is in space.

La présente invention concerne une structure segmentée de réflecteur d'antenne de satellite, comprenant au moins deux panneaux et un dispositif de déploiement permettant de réaliser dans l'espace un déploiement efficace et avantageux de ces deux panneaux.The present invention relates to a segmented structure of a satellite antenna reflector, comprising at least two panels and a deployment device making it possible to achieve an efficient and advantageous deployment in space of these two panels.

L'invention est définie par les revendications indépendantes. Selon l'invention, ladite structure segmentée du type comprenant en outre

  • au moins deux panneaux, un premier panneau dit principal comprenant une face avant et une face arrière, et un second panneau dit secondaire comprenant également une face avant et une face arrière ; et
  • au moins un dispositif de déploiement relié aux faces arrière respectivement desdits panneaux principal et secondaire et apte à amener ledit panneau secondaire dans l'une ou l'autre des deux positions suivantes, relativement audit panneau principal :
    • une position de stockage, dans laquelle ledit panneau secondaire est au moins partiellement superposé audit panneau principal sur la face arrière de ce dernier, la face avant dudit panneau secondaire étant dirigée dans le même sens que la face avant dudit panneau principal ; et
    • une position déployée, dans laquelle ledit panneau secondaire est positionné à côté et contre ledit panneau principal de manière à former un ensemble continu au moins sur leurs faces avant,
est remarquable en ce que ledit dispositif de déploiement comporte :
  • un système de translation comprenant un ensemble à bras articulés, ledit système de translation étant apte à générer un mouvement de translation dudit panneau secondaire par rapport audit panneau principal, et étant lié par une extrémité dite externe audit panneau secondaire ; et
  • un système de rotation apte à générer une rotation dudit système de translation et du panneau secondaire lié audit système de translation, par rapport audit panneau principal, ledit système de rotation étant lié d'une part à une extrémité dite interne dudit système de translation et d'autre part à la face arrière dudit panneau principal.
The invention is defined by the independent claims. According to the invention, said segmented structure of the type further comprising
  • at least two panels, a first so-called main panel comprising a front face and a rear face, and a second so-called secondary panel also comprising a front face and a rear face; and
  • at least one deployment device connected to the rear faces respectively of said main and secondary panels and able to bring said secondary panel into one or the other of the following two positions, relative to said main panel:
    • a storage position, in which said secondary panel is at least partially superimposed on said main panel on the rear face of the latter, the front face of said secondary panel being directed in the same direction as the front face of said main panel; and
    • a deployed position, in which said secondary panel is positioned next to and against said main panel so as to form a continuous assembly at least on their front faces,
is remarkable in that said deployment device comprises:
  • a translation system comprising an assembly with articulated arms, said translation system being able to generate a translational movement of said secondary panel relative to said main panel, and being linked by an end called external to said secondary panel; and
  • a rotation system capable of generating a rotation of said translation system and of the secondary panel linked to said translation system, relative to said main panel, said rotation system being linked on the one hand to a so-called internal end of said translation system and on the other hand to the rear face of said main panel.

Ainsi, grâce à l'invention, le panneau secondaire de la structure segmentée peut être déployée de façon efficace et avantageuse dans l'espace de la position de stockage à la position déployée, comme précisé ci-dessous.Thus, thanks to the invention, the secondary panel of the segmented structure can be deployed efficiently and advantageously in space from the storage position to the deployed position, as specified below.

Ledit système de rotation apte à générer une rotation dudit système de translation comprend :

  • dans un premier mode de réalisation, deux moteurs coaxiaux, synchronisés et commandés de manière à générer des rotations dans le même sens ; et
  • dans un second mode de réalisation, un axe de transmission reliant ensemble des extrémités internes de deux bras du système de translation, et un moteur pour entraîner en rotation cet axe de transmission.
Said rotation system capable of generating a rotation of said translation system comprises:
  • in a first embodiment, two coaxial motors, synchronized and controlled so as to generate rotations in the same direction; and
  • in a second embodiment, a transmission shaft connecting together the internal ends of two arms of the translation system, and a motor for rotating this transmission shaft.

Par ailleurs, selon l'invention, ledit système de translation comporte :

  • un ensemble de deux bras articulés identiques, chacun desdits bras articulés comprenant un segment externe et un segment interne liés ensemble par une liaison pivot, le segment externe de chacun desdits bras étant lié par une liaison pivot à la face arrière dudit panneau secondaire ; et
  • un système de rotation auxiliaire lié à une extrémité interne de chacun des segments internes des deux bras articulés et apte à générer une rotation au niveau de chacune desdites extrémités internes, de façon synchronisée et de sens opposés, de manière à déplier ou replier ledit ensemble de bras articulés.
Furthermore, according to the invention, said translation system comprises:
  • a set of two identical articulated arms, each of said articulated arms comprising an outer segment and an inner segment linked together by a pivot link, the outer segment of each of said arms being linked by a pivot link to the rear face of said secondary panel; and
  • an auxiliary rotation system linked to an internal end of each of the internal segments of the two articulated arms and capable of generating a rotation at each of said internal ends, in a synchronized manner and in opposite directions, so as to unfold or fold up said assembly of articulated arms.

Pour chacun desdits bras articulés, la liaison externe du segment externe à la face arrière du panneau secondaire est équipée d'un joint flexible pour assurer un degré de liberté.For each of said articulated arms, the external connection of the external segment to the rear face of the secondary panel is equipped with a flexible joint to ensure a degree of freedom.

Par ailleurs, dans un premier mode de réalisation, ledit système de rotation auxiliaire comprend deux moteurs, dont l'un est relié à l'extrémité interne du segment interne d'un premier desdits bras et est apte à le soumettre à une rotation, et dont l'autre est relié à l'extrémité interne du segment interne du second desdits bras et est apte à le soumettre à une rotation, ces deux moteurs étant synchronisés et commandés de manière à générer des rotations en sens opposés.Furthermore, in a first embodiment, said auxiliary rotation system comprises two motors, one of which is connected to the internal end of the internal segment of a first of said arms and is capable of subjecting it to rotation, and the other of which is connected to the internal end of the internal segment of the second of said arms and is capable of subjecting it to a rotation, these two motors being synchronized and controlled so as to generate rotations in opposite directions.

En outre, dans un second mode de réalisation, ledit système de rotation auxiliaire comprend un moteur unique relié :

  • d'une part, par une première liaison de transmission de rotation, de préférence une courroie, à l'extrémité interne du segment interne d'un premier desdits bras, apte à le soumettre à une rotation ; et
  • d'une part, par une seconde liaison de transmission de rotation, de préférence une courroie, à l'extrémité interne du segment interne du second bras desdits bras, apte à le soumettre à une rotation,
lesdites première et seconde liaisons de transmission de rotation étant entraînées par ledit moteur unique de manière à transmettre des rotations en sens opposés à la même vitesse.Further, in a second embodiment, said auxiliary rotation system comprises a single motor connected:
  • on the one hand, by a first rotation transmission link, preferably a belt, at the internal end of the internal segment of a first of said arms, capable of subjecting it to a rotation; and
  • on the one hand, by a second rotation transmission link, preferably a belt, at the internal end of the internal segment of the second arm of said arms, capable of subjecting it to a rotation,
said first and second rotational transmission links being driven by said single motor so as to transmit opposite direction rotations at the same speed.

De préférence, ledit moteur unique est un réducteur à engrenage avec deux sorties inversées, chaque sortie étant munie d'une poulie permettant de transmettre une rotation.Preferably, said single motor is a gear reducer with two inverted outputs, each output being provided with a pulley making it possible to transmit a rotation.

Par ailleurs, dans un mode de réalisation préféré, la structure segmentée comprend :

  • un panneau principal central ;
  • deux panneaux secondaires agencés de part et d'autre dudit panneau principal central dans la position déployée de manière à présenter une forme parabolique ; et
  • deux dispositifs de déploiement associés, respectivement auxdits panneaux secondaires.
Furthermore, in a preferred embodiment, the segmented structure comprises:
  • a central main panel;
  • two secondary panels arranged on either side of said central main panel in the deployed position so as to have a parabolic shape; and
  • two associated deployment devices, respectively with said secondary panels.

La présente invention concerne également :

  • un réflecteur d'antenne de satellite qui comprend une structure segmentée telle que précitée ; et
  • un satellite qui comprend au moins une telle structure segmentée ou un tel réflecteur d'antenne.
The present invention also relates to:
  • a satellite antenna reflector which comprises a segmented structure as mentioned above; and
  • a satellite which comprises at least one such segmented structure or one such antenna reflector.

La présente invention concerne également un procédé de déploiement d'une structure segmentée telle que précitée.The present invention also relates to a method of deploying a segmented structure as mentioned above.

Selon l'invention, ce procédé comprend des étapes successives consistant, lors du déploiement de la position stockée à la position déployée :

  1. a) à réaliser, à partir de la position stockée, une rotation à l'aide dudit système de rotation dans un premier sens de rotation de manière à écarter ledit système de translation pourvu à son extrémité externe du panneau secondaire de la face arrière du panneau principal ;
  2. b) à réaliser une translation à l'aide dudit système de translation dans un premier sens de translation de manière à amener ce dernier dans une position dépliée ;
  3. c) à réaliser une rotation dans un sens opposé audit premier sens de rotation à l'aide dudit système de rotation de manière à amener les panneaux secondaire et principal sensiblement dans un même plan général ; et
  4. d) à réaliser une translation à l'aide dudit système de translation dans un sens opposé audit premier sens de translation de manière à amener le panneau secondaire au contact du panneau principal dans une position représentant la position déployée.
According to the invention, this method comprises successive steps consisting, during the deployment from the stored position to the deployed position:
  1. a) to perform, from the stored position, a rotation using said rotation system in a first direction of rotation so as to separate said translation system provided at its outer end with the secondary panel of the rear face of the panel main ;
  2. b) performing a translation using said translation system in a first direction of translation so as to bring the latter into an unfolded position;
  3. c) performing a rotation in a direction opposite to said first direction of rotation using said rotation system so as to bring the secondary and main panels substantially in the same general plane; and
  4. d) performing a translation using said translation system in a direction opposite to said first direction of translation so as to bring the secondary panel into contact with the main panel in a position representing the deployed position.

Le système de rotation auxiliaire du système de translation réalise à l'étape d) :

  • dans un premier mode de réalisation, pour laquelle la position dépliée du système de translation correspond à la position d'extension maximale dudit système de translation, une rotation dans le même sens qu'à l'étape b) ; et
  • dans un second mode de réalisation, une rotation dans le sens opposé à celui de l'étape b).
The auxiliary rotation system of the translation system performs in step d):
  • in a first embodiment, for which the unfolded position of the translation system corresponds to the position of maximum extension of said translation system, a rotation in the same direction as in step b); and
  • in a second embodiment, a rotation in the direction opposite to that of step b).

Les figures du dessin annexé feront bien comprendre comment l'invention peut être réalisée. Sur ces figures, des références identiques désignent des éléments semblables.

  • La figure 1 est une vue schématique en perspective d'un mode de réalisation particulier d'une structure segmentée illustrant l'invention et comprenant un panneau central ainsi que deux panneaux secondaires, dont l'un est dans une position de stockage et l'autre dans une position déployée.
  • La figure 2 illustre un mode de réalisation d'un dispositif de déploiement.
  • La figure 3 est une vue schématique d'un ensemble de bras articulés de la figure 2.
  • Les figures 4 à 8 illustrent, en vue schématique en perspective, différentes étapes successives de déploiement d'un panneau secondaire par rapport à un panneau principal d'une structure segmentée.
  • La figure 9 illustre, en vue schématique en perspective, une structure segmentée complètement déployée.
  • La figure 10 est une vue transversale d'une structure segmentée dans une position de stockage complet.
  • La figure 11 est une vue transversale d'une structure segmentée dans une position complètement déployée.
  • Les figures 12 et 13 sont des vues schématiques en perspective de modes de réalisation particuliers de système de rotation.
  • La figure 14 montre un mode de réalisation particulier d'une liaison entre un bras et un panneau secondaire.
The figures of the appended drawing will make it easier to understand how the invention can be implemented. In these figures, identical references designate similar elements.
  • The figure 1 is a schematic perspective view of a particular embodiment of a segmented structure illustrating the invention and comprising a central panel as well as two secondary panels, one of which is in a storage position and the other in a deployed position.
  • The figure 2 illustrates one embodiment of a deployment device.
  • The figure 3 is a schematic view of a set of articulated arms of the figure 2 .
  • The figures 4 to 8 illustrate, in a schematic perspective view, different successive stages of deployment of a secondary panel relative to a main panel of a segmented structure.
  • The figure 9 illustrates, in schematic perspective view, a fully deployed segmented structure.
  • The figure 10 is a cross-sectional view of a segmented structure in a full storage position.
  • The figure 11 is a cross sectional view of a segmented structure in a fully deployed position.
  • The figures 12 and 13 are schematic perspective views of particular embodiments of the rotation system.
  • The figure 14 shows a particular embodiment of a connection between an arm and a secondary panel.

La structure segmentée 1, illustrant l'invention et représentée schématiquement sur la figure 1 notamment, est destinée, plus particulièrement bien que non exclusivement, à un réflecteur d'antenne de satellite de télécommunication. Un tel réflecteur d'antenne comprend généralement, lorsqu'il est déployé dans l'espace, une structure rigide (appelée coque) pourvue d'une surface réfléchissante, ainsi que des moyens de renfort et de maintien (non représentés) à l'arrière de cette structure, qui participent au maintien de la coque et à la liaison avec le satellite. Notamment pour des raisons d'encombrement lors du lancement du satellite par un lanceur spatial, cette structure est de type segmenté, c'est-à-dire qu'elle est formée de plusieurs segments ou panneaux.The segmented structure 1, illustrating the invention and shown schematically on the figure 1 in particular, is intended, more particularly although not exclusively, for a telecommunications satellite antenna reflector. Such an antenna reflector generally comprises, when it is deployed in space, a rigid structure (called a shell) provided with a reflecting surface, as well as reinforcement and retention means (not shown) at the rear. of this structure, which participate in the maintenance of the hull and in the connection with the satellite. In particular for reasons of space when the satellite is launched by a space launcher, this structure is of the segmented type, that is to say it is formed of several segments or panels.

Plus précisément, la présente invention concerne une structure segmentée 1 du type comprenant :

  • au moins deux panneaux, à savoir au moins un premier panneau 2 dit principal comprenant une face avant 2A et une face arrière 2B (figures 10 et 11), et au moins un second panneau 3, 4 dit secondaire comprenant également une face avant 3A, 4A et une face arrière 3B, 4B ; et
  • au moins un dispositif de déploiement 5 qui est relié aux faces arrière 2B et 3B respectivement du panneau principal 2 et d'un panneau secondaire (le panneau 3 dans l'exemple de la figure 2).
More specifically, the present invention relates to a segmented structure 1 of the type comprising:
  • at least two panels, namely at least a first so-called main panel 2 comprising a front face 2A and a rear face 2B ( figures 10 and 11 ), and at least one second so-called secondary panel 3, 4 also comprising a front face 3A, 4A and a rear face 3B, 4B; and
  • at least one deployment device 5 which is connected to the rear faces 2B and 3B respectively of the main panel 2 and of a secondary panel (the panel 3 in the example of figure 2 ).

Ce dispositif de déploiement 5 est apte à amener le panneau secondaire 3, dans l'une ou l'autre des deux positions suivantes, relativement au panneau principal 2 :

  • une position de stockage P1 comme représenté sur les figures 4 et 10, dans laquelle ledit panneau secondaire 3 est au moins partiellement superposé et de préférence complètement superposé au panneau principal 2 sur la face arrière 2B de ce dernier. La face avant 3A du panneau secondaire 3 est dirigée dans le même sens que la face avant 2A du panneau principal 2 ; et
  • une position déployée P2 comme représenté sur les figures 8, 9 et 11, dans laquelle le panneau secondaire 3 est positionné à côté et contre le panneau principal 2 de manière à former un ensemble continu au moins sur leurs faces avant 2A et 3A.
This deployment device 5 is able to bring the secondary panel 3, into one or the other of the following two positions, relative to the main panel 2:
  • a storage position P1 as shown in the figures 4 and 10 , wherein said secondary panel 3 is at least partially superimposed and preferably completely superimposed on the main panel 2 on the rear face 2B thereof. The front face 3A of the secondary panel 3 is directed in the same direction as the front face 2A of the main panel 2; and
  • a deployed position P2 as shown in the figures 8 , 9 and 11 , in which the secondary panel 3 is positioned next to and against the main panel 2 so as to form a continuous assembly at least on their front faces 2A and 3A.

Dans la description de la présente invention, on entend :

  • par face avant et face arrière, les deux faces d'un panneau, la face avant 3A, 4A d'un panneau secondaire 3, 4 étant superposée au moins partiellement à la face arrière 2B du panneau principal 2, chaque face avant 2A, 3A, 4A correspondant dans le cas d'un réflecteur d'antenne à la face réfléchissante ; et
  • par interne et externe, les positions des différents éléments concernés par rapport au centre de la structure segmentée 1 dans la position déployée de cette dernière, « interne » s'appliquant à la position la plus proche du centre et « externe » s'appliquant à la position la plus éloignée du centre dans cette position déployée.
In the description of the present invention, is meant:
  • by front face and rear face, the two faces of a panel, the front face 3A, 4A of a secondary panel 3, 4 being superimposed at least partially on the rear face 2B of the main panel 2, each front face 2A, 3A , 4A corresponding in the case of an antenna reflector to the reflecting face; and
  • by internal and external, the positions of the various elements concerned with respect to the center of the segmented structure 1 in the deployed position of the latter, "internal" applying to the position closest to the center and "External" applying to the position furthest from the center in this deployed position.

Dans le mode de réalisation préféré, représenté sur les figures, la structure segmentée 1 comprend :

  • un panneau principal 2 central ;
  • deux panneaux secondaires 3 et 4 agencés de part et d'autre dudit panneau principal 2 central dans la position complètement déployée (figures 9 et 11) de telle sorte que ces trois panneaux 2, 3 et 4 présentent une forme parabolique dans cette position complètement déployée ; et
  • deux dispositifs de déploiement 5 associés, respectivement, auxdits panneaux secondaires 3 et 4.
In the preferred embodiment, shown in the figures, the segmented structure 1 comprises:
  • a central main panel 2;
  • two secondary panels 3 and 4 arranged on either side of said central main panel 2 in the fully deployed position ( figures 9 and 11 ) such that these three panels 2, 3 and 4 have a parabolic shape in this fully extended position; and
  • two deployment devices 5 associated, respectively, with said secondary panels 3 and 4.

Dans la situation de la figure 1, l'un 3 des panneaux secondaires 3 et 4 est dans la position déployée P2, et l'autre 4 desdits panneaux secondaires 3 et 4 est dans la position de stockage P1.In the situation of figure 1 , one 3 of the secondary panels 3 and 4 is in the deployed position P2, and the other 4 of said secondary panels 3 and 4 is in the storage position P1.

Selon l'invention, chacun des dispositifs de déploiement 5 de la structure segmentée 1, comporte :

  • un système de translation 6 comprenant un ensemble 7 à bras articulés. Le système de translation 6 est apte à générer un mouvement de translation du panneau secondaire 3, 4 par rapport au panneau principal 2, et est lié par une extrémité externe 6A au panneau secondaire 3, 4 ; et
  • un système de rotation 8 apte à générer une rotation dudit système de translation 6 et du panneau secondaire 3, 4 lié audit système de translation 6, par rapport audit panneau principal 2, autour d'un axe α (figure 2). Ledit système de rotation 8 est lié d'une part à une extrémité interne 6B du système de translation 6 et d'autre part à la face arrière 2B du panneau principal 2.
According to the invention, each of the deployment devices 5 of the segmented structure 1 comprises:
  • a translation system 6 comprising an assembly 7 with articulated arms. The translation system 6 is able to generate a translational movement of the secondary panel 3, 4 relative to the main panel 2, and is linked by an external end 6A to the secondary panel 3, 4; and
  • a rotation system 8 capable of generating a rotation of said translation system 6 and of the secondary panel 3, 4 linked to said translation system 6, with respect to said main panel 2, about an axis α ( figure 2 ). Said rotation system 8 is linked on the one hand to an internal end 6B of the translation system 6 and on the other hand to the rear face 2B of the main panel 2.

Dans le mode de réalisation représenté sur les figures, la liaison à la face arrière 2B du panneau principal 2 est réalisée par l'intermédiaire d'un élément de structure 23, de préférence de forme plane, qui est fixé sur la face arrière 2B et qui sert de support aux dispositifs de déploiement 5 des deux panneaux secondaires 3 et 4.In the embodiment shown in the figures, the connection to the rear face 2B of the main panel 2 is made by means of a structural element 23, preferably of planar shape, which is fixed to the rear face 2B and which serves as a support for the deployment devices 5 of the two secondary panels 3 and 4.

Un tel dispositif de déploiement 5 permet de réaliser un déploiement efficace et avantageux du panneau secondaire, auquel il est associé, de la position de stockage P1 à la position déployée P2, comme précisé ci-dessous.Such a deployment device 5 enables efficient and advantageous deployment of the secondary panel, with which it is associated, from the storage position P1 to the deployed position P2, as specified below.

Le système de translation 6 comprend un ensemble 7 de deux bras articulés 9A et 9B identiques qui sont agencés de façon symétrique par rapport à un axe X-X de la structure segmentée 1, notamment un axe de symétrie, comme représenté sur la figure 2. Chacun desdits bras articulés 9A et 9B comprend un segment externe 10 et un segment interne 11 liés ensemble par une liaison pivot 12, comme représenté sur la figure 3. De plus, le segment externe 10 de chacun desdits bras 9A et 9B est lié par une liaison pivot 13 à la face arrière 3B du panneau secondaire 3.The translation system 6 comprises a set 7 of two identical articulated arms 9A and 9B which are arranged symmetrically with respect to an axis XX of the segmented structure 1, in particular an axis of symmetry, as shown in FIG. figure 2 . Each of said articulated arms 9A and 9B comprises an outer segment 10 and an inner segment 11 linked together by a pivot link 12, as shown in FIG. figure 3 . In addition, the outer segment 10 of each of said arms 9A and 9B is linked by a pivot connection 13 to the rear face 3B of the secondary panel 3.

Dans le mode de réalisation préféré, représenté sur les figures, ledit système de translation 6 comporte de plus un système de rotation auxiliaire 14, 15.In the preferred embodiment, shown in the figures, said translation system 6 further comprises an auxiliary rotation system 14, 15.

Ce système de rotation auxiliaire 14, 15 est lié à une extrémité interne 11A de chacun des segments internes 11 des bras articulés 9A et 9B, et il agit directement sur les extrémités internes 11A de manière à générer une rotation au niveau de chacune des deux extrémités internes 11A autour d'un axe β. Le système de rotation auxiliaire 14, 15 génère des rotations au niveau des extrémités internes 11A des deux bras 5A et 5B de façon synchronisée et de sens opposés, de manière à déplier ou replier ledit ensemble 7 de bras articulés, et ceci pour que l'ensemble 7 ait un déplacement rectiligne selon l'axe X-X.This auxiliary rotation system 14, 15 is linked to an internal end 11A of each of the internal segments 11 of the articulated arms 9A and 9B, and it acts directly on the internal ends 11A so as to generate a rotation at each of the two ends. internal 11A around an axis β. The auxiliary rotation system 14, 15 generates rotations at the internal ends 11A of the two arms 5A and 5B in a synchronized manner and in opposite directions, so as to unfold or fold said assembly 7 of articulated arms, and this so that the assembly 7 has a rectilinear displacement along the axis XX.

En effet, la rotation (illustrée par une flèche E1 autour de l'axe β sur la figure 3) est générée par le système de rotation auxiliaire 14. Les rotations générées respectivement sur les deux bras articulés 9A et 9B de l'ensemble 7 étant inversées (dans le sens de la flèche E1 pour 9B et dans le sens opposé de la flèche E2 pour 9A, comme représenté par exemple sur la figure 13), et ceci de manière synchronisée, c'est-à-dire à la même vitesse, elles génèrent une translation de l'ensemble 7 de bras (et donc du système de déploiement 5), comme illustré par exemple par une flèche B1 sur la figure 6.Indeed, the rotation (illustrated by an arrow E1 around the axis β on the figure 3 ) is generated by the auxiliary rotation system 14. The rotations generated respectively on the two articulated arms 9A and 9B of the assembly 7 being reversed (in the direction of arrow E1 for 9B and in the opposite direction of arrow E2 for 9A, as shown for example on figure 13 ), and this in a synchronized manner, i.e. at the same speed, they generate a translation of the arm assembly 7 (and therefore of the deployment system 5), as illustrated for example by an arrow B1 on the figure 6 .

Dans un premier mode de réalisation représenté sur les figures 1 à 3, ledit système de rotation auxiliaire 14 comprend deux moteurs 17 et 18 (par exemple de type pas à pas). L'un 17 desdits moteurs 17 et 18 est relié à l'extrémité interne 11A du segment interne 11 d'un premier bras 9B et est apte à soumettre ce segment interne 11 à une rotation. L'autre 18 desdits moteurs 17 et 18 est relié à l'extrémité interne 11A du segment interne 11 du second bras 9A et est également apte à soumettre ce segment interne 11 à une rotation. Lesdits moteurs 17 et 18, par exemple des servomoteurs à réducteur à engrenage, sont synchronisés et commandés de manière à générer des rotations en sens opposés E1 et E2 autour d'axes β parallèles, via à chaque fois un moyen de transmission usuel 19.In a first embodiment shown in the figures 1 to 3 , said auxiliary rotation system 14 comprises two motors 17 and 18 (for example of the stepping type). One 17 of said motors 17 and 18 is connected to the internal end 11A of the internal segment 11 of a first arm 9B and is able to subject this internal segment 11 to a rotation. The other 18 of said motors 17 and 18 is connected to the internal end 11A of the internal segment 11 of the second arm 9A and is also capable of subjecting this internal segment 11 to rotation. Said motors 17 and 18, for example gear reducer servomotors, are synchronized and controlled so as to generate rotations in opposite directions E1 and E2 around parallel β axes, each time via a usual transmission means 19.

En outre, dans un second mode de réalisation représenté sur la figure 13, ledit système de rotation auxiliaire 15 comprend un moteur unique 20 agencé de façon centrale entre les extrémités internes des bras 9A et 9B. De préférence, ledit moteur central 20 comprend un motoréducteur à engrenage avec deux sorties inversées. Chaque sortie est munie d'une poulie 21A, 21B permettant de transmettre les rotations par liaisons de transmission de rotation 22A, 22B, de préférence par courroies, aux segments 11 des bras 9A et 9B. Ce moteur central unique 20 est donc relié :

  • d'une part, par une première liaison de transmission de rotation 22A, à l'extrémité interne 11A du segment interne 11 d'un premier bras 9B, apte à le soumettre à une rotation ; et
  • d'une part, par une seconde liaison de transmission de rotation 22B, à l'extrémité interne 11A du segment interne 11 du second bras 9A, apte à le soumettre à une rotation.
Further, in a second embodiment shown in figure 13 , said auxiliary rotation system 15 comprises a single motor 20 centrally arranged between the inner ends of the arms 9A and 9B. Preferably, said central motor 20 comprises a geared motor with two inverted outputs. Each output is provided with a pulley 21A, 21B making it possible to transmit the rotations by rotational transmission links 22A, 22B, preferably by belts, to the segments 11 of the arms 9A and 9B. This single central motor 20 is therefore connected:
  • on the one hand, by a first rotation transmission link 22A, at the internal end 11A of the internal segment 11 of a first arm 9B, capable of subjecting it to a rotation; and
  • on the one hand, by a second rotation transmission link 22B, at the internal end 11A of the internal segment 11 of the second arm 9A, capable of subjecting it to a rotation.

Lesdites première et seconde liaisons 22A et 22B sont entraînées par le moteur 20 de manière à transmettre des rotations en sens opposés à la même vitesse.Said first and second links 22A and 22B are driven by motor 20 so as to transmit rotations in opposite directions at the same speed.

Par ailleurs, le système de rotation 8 (apte à générer la rotation du système de translation 6 autour de l'axe de rotation principal α) peut également être réalisé de différentes manières. De préférence, il est relié à la face arrière 2A du panneau principal 2 par l'intermédiaire de l'élément de support 23 de forme sensiblement plane.Furthermore, the rotation system 8 (capable of generating the rotation of the translation system 6 around the main axis of rotation α) can also be produced in different ways. Preferably, it is connected to the rear face 2A of the main panel 2 by means of the support element 23 of substantially planar shape.

Dans un premier mode de réalisation représenté sur les figures 2 et 3, ledit système de rotation 8 comprend deux moteurs 25 et 26 coaxiaux (selon l'axe α) qui agissent directement sur l'axe de rotation de chaque bras 9A et 9B. Ces moteurs 25 et 26 sont synchronisés et génèrent une rotation dans le même sens, comme illustré par une flèche F1 sur la figure 3.In a first embodiment shown in the figures 2 and 3 , said rotation system 8 comprises two coaxial motors 25 and 26 (along the axis α) which act directly on the axis of rotation of each arm 9A and 9B. These motors 25 and 26 are synchronized and generate a rotation in the same direction, as illustrated by an arrow F1 on the figure 3 .

Par ailleurs, dans un second mode de réalisation représenté sur la figure 13, ledit système de rotation 8 comprend un axe de transmission 27 qui est lié aux extrémités des bras 9A et 9B, de manière à lier ensemble mécaniquement ces deux bras 9A et 9B. Cet axe de transmission 27 est entraîné par un moteur approprié 28, par exemple un vérin à vis, qui est fixé sur l'élément de support 23. La translation du vérin entraîne la rotation de l'axe de transmission 27.Furthermore, in a second embodiment shown in figure 13 , said rotation system 8 comprises a transmission shaft 27 which is linked to the ends of the arms 9A and 9B, so as to mechanically link these two arms 9A and 9B together. This transmission shaft 27 is driven by a suitable motor 28, for example a screw jack, which is fixed to the support element 23. The translation of the jack causes the rotation of the transmission shaft 27.

Par ailleurs, dans un mode de réalisation particulier représenté sur la figure 14, pour chacun des bras 9A et 9B articulés, la liaison externe du bras externe 10 à la face arrière 3B du panneau secondaire 3 est flexible, par exemple à l'aide d'un joint 29 approprié, de manière à créer une certaine flexibilité entre le panneau secondaire 2 et l'ensemble 7 à bras, notamment pour faciliter un positionnement final, représenté sur la figure 8 et précisé ci-dessous.Furthermore, in a particular embodiment shown in figure 14 , for each of the articulated arms 9A and 9B, the external connection of the external arm 10 to the rear face 3B of the secondary panel 3 is flexible, for example using an appropriate joint 29, so as to create a certain flexibility between the secondary panel 2 and the arm assembly 7, in particular to facilitate final positioning, shown in figure 8 and specified below.

Les dispositifs de déploiement 5 de la structure segmentée 1, associés aux différents panneaux secondaires 3 et 4 de cette structure segmentée 1, permettent donc de réaliser un déploiement de la structure segmentée 1 d'une position de stockage complet (pour laquelle tous les panneaux secondaires 3 et 4 sont dans une position de stockage P1, comme représenté notamment sur la figure 10) à une position complètement déployée (pour laquelle tous les panneaux secondaires 3 et 4 sont dans une position déployée P2, comme représenté notamment sur la figure 11).The deployment devices 5 of the segmented structure 1, associated with the various secondary panels 3 and 4 of this segmented structure 1, therefore make it possible to deploy the segmented structure 1 from a full storage position (for which all the secondary panels 3 and 4 are in a storage position P1, as shown in particular on the figure 10 ) to a fully extended position (for which all the secondary panels 3 and 4 are in a deployed position P2, as shown in particular on the figure 11 ).

Le dispositif de déploiement 5 comporte également des moyens non représentés (par exemple une unité centrale) pour commander les systèmes de rotation 8, 14, 15.The deployment device 5 also comprises means not shown (for example a central unit) for controlling the rotation systems 8, 14, 15.

Par ailleurs, la structure segmentée 1 peut comprendre des moyens de maintien usuels (non représentés) des différents panneaux 2, 3 et 4 dans la position de stockage P1. Ces moyens de maintien sont libérés avant le déploiement, pour que chaque dispositif de déploiement 5 puisse mettre en œuvre le déploiement précisé ci-dessous.Furthermore, the segmented structure 1 can comprise usual means of maintaining (not shown) of the various panels 2, 3 and 4 in the storage position P1. These holding means are released before deployment, so that each deployment device 5 can implement the deployment specified below.

Le fonctionnement dudit dispositif de déploiement 5, pour le déploiement d'un 3 desdits panneaux secondaires 3, 4 à partir de la position stockée P1 de la figure 4 à la position déployée P2 de la figure 8, est le suivant :

  1. a) on réalise, à partir de la position stockée P1 de la figure 4, une rotation à l'aide dudit système de rotation 8 dans un premier sens de rotation A1 (montré sur la figure 5) de manière à écarter le système de translation 6 pourvu à son extrémité externe 6A du panneau secondaire 3 de la face arrière 2A du panneau principal 2, comme illustré sur la figure 5 ;
  2. b) on réalise une translation, à l'aide dudit système de translation 6 dans un premier sens de translation B1 (montré sur la figure 6) de manière à amener ce dernier dans une position dépliée, comme illustré sur la figure 6 ;
  3. c) on réalise une rotation dans un sens A2 (montré sur la figure 7) opposé audit premier sens de rotation A1 à l'aide dudit système de rotation 8, de manière à amener le panneau secondaire 3 et le panneau principal 2 sensiblement dans un même plan général, comme illustré sur la figure 7 ; et
  4. d) on réalise une translation, à l'aide dudit système de translation 6 dans un sens B2 (montré sur la figure 8) opposé audit premier sens de translation B1 de manière à amener le panneau secondaire 3 au contact du panneau principal 2 dans une position représentant la position déployée P2, comme illustré sur la figure 8.
The operation of said deployment device 5, for the deployment of one 3 of said secondary panels 3, 4 from the stored position P1 of the figure 4 to the deployed position P2 of the figure 8 , is the next :
  1. a) we realize, from the stored position P1 of the figure 4 , a rotation using said rotation system 8 in a first direction of rotation A1 (shown on figure 5 ) so as to separate the translation system 6 provided at its outer end 6A of the secondary panel 3 from the rear face 2A of the main panel 2, as illustrated in figure 5 ;
  2. b) a translation is carried out, using said translation system 6 in a first direction of translation B1 (shown on figure 6 ) so as to bring the latter into an unfolded position, as shown in the figure 6 ;
  3. c) one carries out a rotation in a direction A2 (shown on the figure 7 ) opposite to said first direction of rotation A1 with the aid of said rotation system 8, so as to bring the secondary panel 3 and the main panel 2 substantially in the same general plane, as illustrated in FIG. figure 7 ; and
  4. d) a translation is carried out, using said translation system 6 in a direction B2 (shown on figure 8 ) opposite to said first direction of translation B1 so as to bring the secondary panel 3 into contact with the main panel 2 in a position representing the deployed position P2, as illustrated in figure 8 .

Le même procédé de déploiement est mis en œuvre pour le panneau secondaire 4 de manière à finalement obtenir la position complètement déployée de la structure segmentée 1 de la figure 9.The same deployment method is implemented for the secondary panel 4 so as to finally obtain the fully deployed position of the segmented structure 1 of the figure 9 .

Le système de rotation auxiliaire 14, 15 du système de translation 6 peut réaliser à l'étape d) :

  • dans un premier mode de réalisation, pour laquelle la position dépliée du système de translation 6 correspond à sa position d'extension maximale, une rotation (autour de β) dans le même sens qu'à l'étape b) ; et
  • dans un second mode de réalisation, une rotation (autour de β) dans le sens opposé à celui de l'étape b).
The auxiliary rotation system 14, 15 of the translation system 6 can achieve in step d):
  • in a first embodiment, for which the unfolded position of the translation system 6 corresponds to its position of maximum extension, a rotation (around β) in the same direction as in step b); and
  • in a second embodiment, a rotation (around β) in the direction opposite to that of step b).

Dans les deux cas, cette rotation génère une translation dans le sens montré par la flèche B2 sur la figure 8, permettant de ramener le panneau secondaire 3 au contact du panneau principal 2.In both cases, this rotation generates a translation in the direction shown by the arrow B2 on the figure 8 , allowing the secondary panel 3 to be brought into contact with the main panel 2.

Bien entendu, le dispositif 5 peut également amener la structure segmentée de la position déployée P2 à la position stockée P1, si cela s'avérait nécessaire, par exemple pour une opération de validation, en réalisant les opérations précitées dans l'ordre inverse (d, c, b, a), avec chaque opération (rotation, translation) mise en œuvre en sens inverse.Of course, the device 5 can also bring the segmented structure from the deployed position P2 to the stored position P1, if this turns out to be necessary, for example for a validation operation, by performing the aforementioned operations in the reverse order (d , c, b, a), with each operation (rotation, translation) carried out in reverse.

Par ailleurs, la structure segmentée 1 peut comporter des moyens non représentés pour permettre un positionnement final précis entre un panneau secondaire 3, 4 et le panneau principal 2 dans la situation des figures 8 et 9, ainsi que des moyens pour verrouiller les panneaux dans la position complètement déployée de la structure segmentée 1 de la figure 9.Furthermore, the segmented structure 1 may include means, not shown, to allow precise final positioning between a secondary panel 3, 4 and the main panel 2 in the situation of figures 8 and 9 , as well as means for locking the panels in the fully deployed position of the segmented structure 1 of the figure 9 .

Claims (14)

  1. A segmented structure of a satellite antenna reflector, said segmented structure (1) comprising:
    - at least two panels (2, 3, 4), a first panel so-called main panel and comprising a front face (2A) and a rear face (2B), and a second panel (3, 4) so-called secondary panel and also comprising a front face (3A, 4A) and a rear face (3B, 4B); and
    - at least one extension device (5) connected to the rear faces of the said main panel and secondary panel, and being configured to bring said secondary panel (3, 4) into one or the other of the two following positions relative to said main panel (2):
    • a storage position (P1), in which said secondary panel (3, 4) is positioned at least in part above said main panel (2) on the main panel rear face (2B), the secondary panel front face (3, 4) being oriented in the same direction as the main panel front face (2A); and
    • an extended position (P2), in which said secondary panel (3, 4) is positioned next to and against said main panel (2) to form a continuous assembly at least on the front faces of said panels,
    said extension device (5) comprising:
    • a translation system (6) configured to translate said secondary panel (3, 4) relative to said main panel (2) and connected to said secondary panel by an external end (6A); and
    • a rotation system (8) connected to an internal end (6B) of said translation system (6), and to the main panel rear face (2B),
    characterized in that:
    - said rotation system (6) is configured to rotate said translation system (6) and the secondary panel (3, 4) relative to said main panel (2) around an axis (α) located at the side of the rear face of the main panel (2) ; and
    - said translation system (6) comprising:
    • an assembly (7) of two articulated arms (9A, 9B), each of said articulated arms (9A, 9B) comprising an external segment (10) pivotally connected to an internal segment (11), the external segment (10) of each of said arms (9A, 9B) being pivotally connected to the secondary panel rear face (3B), the external segments being at a greater distance from the center of the segmented structure then the internal segments in an extended position of this of this structure ; and
    • an auxiliary rotation system (14, 15) connected to an internal end of each of the internal segments (11) of the articulated arms (9A, 9B) and configured to cause a rotation in the region of each of said internal ends in a synchronized manner and in opposite directions to open out or fold away said assembly (7) of articulated arms.
  2. The segmented structure according to claim 1, characterized in that, for each of said articulated arms (9A, 9B), the external connection of the external segment (10) to the secondary panel rear face (3B) is equipped with a flexible joint (29).
  3. The segmented structure according to claim 1 or 2, characterized in that said auxiliary rotation system (14) comprises two motors (17, 18), one of which is connected to the internal end of the internal segment (11) of a first (19B) of said arms and is configured to rotate said internal segment, and the other (18) of which is connected to the internal end of the internal segment (11) of the second of said arms (9A) and is configured to rotate said internal segment, said motors (17, 18) being synchronized and controlled to bring about rotations in opposite directions.
  4. The segmented structure according to claim 1 or 2, characterized in that said auxiliary rotation system (15) comprises a single motor (20) that is connected both to:
    - the internal end of the internal segment (11) of a first (9B) of said arms by a first connection (22A) for transmitting rotations which is configured to rotate said internal segment; and
    - the internal end of the internal segment (11) of the second (9A) of said arms by a second connection for transmitting rotations which is configured to rotate said internal segment;
    said first and second connections for transmitting rotations being driven by said single motor to transmit rotations in opposite directions at the same speed.
  5. The segmented structure according to claim 4, characterized in that said motor (20) is a gear motor reducer having two outputs opposite each other, each output being provided with a pulley (21A, 21B) configured to transmit a rotation.
  6. The segmented structure according to any one of claims 1 to 5, characterized in that said rotation system (8) comprises two coaxial motors (25, 26) synchronised and controlled to bring about rotations in the same direction.
  7. The segmented structure according to any one of claims 1 to 5, characterized in that said rotation system (8) comprises a transmission spindle (27) that interconnects the internal ends of the two arms (9A, 9B) of the translation system (6), and a motor (28) configured to rotate said transmission spindle (27).
  8. The segmented structure according to any one of the preceding claims characterized in that it comprises :
    - a central main panel (2);
    - two secondary panels (3, 4) arranged on either side of said central main panel (2) when in the extended position in such a way as to be parabolic; and
    two extension devices (5) connected to each of said secondary panels (3, 4) respectively.
  9. A satellite antenna reflector comprising a segmented structure (1) according to claim 1.
  10. A satellite comprising at least one segmented structure (1) according to any one of claims 1 to 8.
  11. A method for extending a segmented structure (1) according to any one of claims 1 to 8, characerized in that said method comprises, during the extension from the storage position (P1) into the extended position (P2), the steps of:
    a) performing a rotation from the storage position in a first rotation direction (A1) by means of said rotation system (8) in such a way as to move said translation system (6), provided at the external end thereof with the secondary panel (3), away from the rear face (2B) of the main panel (2);
    b) performing a translational movement in a first translation direction (B1) by means of said translation system (6) in such a way as to bring said system into an opened out position;
    c) performing a rotation in a direction (A2) counter to said first rotation direction (A1) by means of said rotation system (8) in such a way as to bring the secondary panels and the main panel substantially into a common general plane; and
    d) performing a translational movement in a direction (B2) counter to said first translation direction (B1) by means of said translation system (6) in such a way as to bring the secondary panel (3) into contact with the main panel (2) in a position that is the extended position (P2).
  12. The method according to claim 11, characterized in that the opened out position of the translation system (6) corresponds to a maximum extension of said translation system (6).
  13. The method according to claim 12, characterized in that, at step d), the auxiliary rotation system (14, 15) of the translation system (6) performs a rotation in the same direction as in step b).
  14. The method according to claim 11 or 12, characterized in that, at step d), the auxiliary rotation system (14, 15) of the translation system (6) performs a rotation in the direction counter to that in step b).
EP14784266.0A 2013-09-26 2014-09-11 Segmented structure in particular for antenna reflectors of satellites Active EP3050158B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1302234A FR3011133B1 (en) 2013-09-26 2013-09-26 SEGMENTED STRUCTURE, ESPECIALLY FOR SATELLITE ANTENNA REFLECTUR
PCT/FR2014/000206 WO2015044535A1 (en) 2013-09-26 2014-09-11 Segmented structure, especially for a satellite antenna reflector

Publications (2)

Publication Number Publication Date
EP3050158A1 EP3050158A1 (en) 2016-08-03
EP3050158B1 true EP3050158B1 (en) 2021-03-31

Family

ID=50097731

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14784266.0A Active EP3050158B1 (en) 2013-09-26 2014-09-11 Segmented structure in particular for antenna reflectors of satellites

Country Status (5)

Country Link
US (1) US10135151B2 (en)
EP (1) EP3050158B1 (en)
CA (1) CA2923480A1 (en)
FR (1) FR3011133B1 (en)
WO (1) WO2015044535A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10957986B2 (en) * 2017-08-04 2021-03-23 Space Systems/Loral, Llc Reconfigurable spacecraft with a hold-down assembly for a rigid reflector
FR3098105B1 (en) 2019-07-02 2023-05-19 Safran Coating Dressing with improved fluid distribution.

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59126305A (en) * 1983-01-10 1984-07-20 Nippon Telegr & Teleph Corp <Ntt> Expansion type antenna reflector
JPS6027203A (en) * 1983-07-26 1985-02-12 Nippon Telegr & Teleph Corp <Ntt> Expanding device for antenna
JP4060955B2 (en) * 1998-07-30 2008-03-12 東洋ガラス株式会社 Product conveyor
US6191757B1 (en) * 1999-04-08 2001-02-20 Hughes Electronics Corporation System for compact stowage of segmented dish reflectors
JP4791656B2 (en) * 2001-07-03 2011-10-12 オーチス エレベータ カンパニー Floor height variable double deck elevator

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
US20160226135A1 (en) 2016-08-04
CA2923480A1 (en) 2015-04-02
FR3011133B1 (en) 2018-03-02
US10135151B2 (en) 2018-11-20
WO2015044535A1 (en) 2015-04-02
FR3011133A1 (en) 2015-03-27
EP3050158A1 (en) 2016-08-03

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