WO2011076909A1 - Appareil permettant d'isoler mécaniquement un objet placé au-dessus d'un autre - Google Patents

Appareil permettant d'isoler mécaniquement un objet placé au-dessus d'un autre Download PDF

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Publication number
WO2011076909A1
WO2011076909A1 PCT/EP2010/070607 EP2010070607W WO2011076909A1 WO 2011076909 A1 WO2011076909 A1 WO 2011076909A1 EP 2010070607 W EP2010070607 W EP 2010070607W WO 2011076909 A1 WO2011076909 A1 WO 2011076909A1
Authority
WO
WIPO (PCT)
Prior art keywords
spring
isam
damper
dampers
attached
Prior art date
Application number
PCT/EP2010/070607
Other languages
English (en)
Inventor
Edwin Leonardus Josephus Hogeman
Jos Christiaan De Kraker
Andreas Franciscus Joseph Weersink
Original Assignee
Thales Nederland B.V.
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 Thales Nederland B.V. filed Critical Thales Nederland B.V.
Publication of WO2011076909A1 publication Critical patent/WO2011076909A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B17/00—Vessels parts, details, or accessories, not otherwise provided for
    • B63B17/0081—Vibration isolation or damping elements or arrangements, e.g. elastic support of deck-houses

Definitions

  • the present invention relates to apparatus for mechanically isolating a first object above a second object.
  • the invention is particularly applicable to ships design.
  • Sensitive electronic equipments installed on board of a navy ship such as sensors, antennas, radars and other Radio-Frequency equipments (RF), require measures to cope with severe shocks and vibrations. However, it is a challenge not to compromise the performance of the primary RF functions of the electronic equipments.
  • RF Radio-Frequency equipment
  • a first solution is to harden the equipments on component level, as specified in military standards. However, this leads to unacceptable increasing of mass and volume, and prevents from using cost-effective Components Off The Shelves (COTS).
  • COTS Cost-effective Components Off The Shelves
  • the prior art teaches isolating from mechanical loads each equipment individually.
  • EP 1 424 507 discloses a coupling device consisting in a combination of rod-mechanisms and dampers to suspend a sensitive electronic equipment.
  • the patent discloses the use of such elementary coupling devices for locally isolating from mechanical loads each radar, each antenna and each optical sensor on a navy ship.
  • the present invention aims to provide an apparatus which may be used to overcome at least some of the technical problems described above.
  • the invention aims at a global uncoupling, so as to reduce dynamic loads in rotation induced by ship rotations and thus at improving sensors accuracy.
  • the invention proposes an integrated suspension solution based on combined spring-damper elements only and that has six degrees of freedom : three in translation and three in rotation.
  • the invention proposes an apparatus for mechanically isolating a first object above a second object.
  • the apparatus comprises a plurality of spring-dampers.
  • Each spring-damper is arranged so that one of its end is attached to the second object and its other end is attached to the first object and headed to a point which is substancially in the horizontal plane containing the centre of gravity of the first object, so as to minimise the rotation movements of the first object when the second object is driven into a rotation movement.
  • the second object may a Cabinet Module of a ship and the first object may be an Integrated Sensor Arrangement Module of a ship.
  • the top side of the second object may have four corners and the first object may have four side walls.
  • Each corner of the top side of the second object may have ends of two spring-dampers attached to, the other ends of these two spring-dampers being attached to two adjacent side walls of the first object.
  • an advantage provided by the present invention in any of its aspects is that it requires less provisions, thus reducing assembling and maintenance costs.
  • the invention enables having a fixed distance between radiator and radome, thus allowing optimum RF performance.
  • the invention provides the ability to minimise the required built- in space, which results in compact packaging arrangements with a minimal amount of mass.
  • the invention allows a flexible interface to the ship deck.
  • FIG. 1 schematically illustrates by a front section view an exemplary suspension layer according to the invention
  • - figure 2 schematically illustrates the same exemplary suspension layer according to the invention.
  • like reference signs are assigned to like items.
  • FIG 1 schematically illustrates by a front section view an exemplary suspension layer 23 according to the invention.
  • S AM contains antennas and radar electronics/optics that are not represented on Figure 1 .
  • a Cabinet Module 22 (CM) of a height H C M is supported by the deck 24 of a navy ship.
  • the CM 22 contains all back-end electronics 25, 26, 27, 28 and 29 of the antennas and radar electronics/optics contained in ISAM 21 .
  • the ISAM 21 is suspended above the CM 22 by the single suspension layer 23 of a height HSL according to the invention.
  • the suspension layer 23 comprises a typical constellation composed of spring-dampers, depicted configuration shows eight spring-dampers 1 , 2, 3, 4, 5, 6, 7 and 8.
  • spring-dampers 1 and 2 can be viewed on Figure 1 , as it is a front view.
  • spring-dampers 3, 4, 5, 6, 7 and 8 can be viewed on Figure 2.
  • the interface between the ISAM 21 and the CM 22 has fixed dimensions Fl (Fixed Interface), while the footprint of the CM 22 on the deck 24 has variable dimensions FP (Flexible Footprint).
  • Figure 2 schematically illustrates by a top view, a front view and a side view the same exemplary suspension layer 23 according to the invention. These views represent the arrangement of the eight spring- dampers 1 , 2, 3, 4, 5, 6, 7 and 8 in order to suspend the ISAM 21 above the CM 22. To understand the arrangement of the spring-dampers 1 , 2, 3, 4, 5, 6, 7 and 8, the three views must be considered at a same time.
  • the bottom side of the ISAM 21 is depicted as a squared shaped, as well as the top side of the CM 22. Shape can vary depending on the design constraints.
  • the first end of the spring-damper 1 is attached to a first corner of the top side of the CM 22.
  • the second end of the spring-damper 1 is headed to a point VSC 1 (Virtual Spring Centre).
  • the point VSC 1 is located at the intersection of the vertical symmetry axis of a first side wall of the ISAM 21 , said first side wall being adjacent to the first corner to which the first end of the spring-damper 1 is attached, with the horizontal plane PCOG which contains the centre of gravity COG of the ISAM 21 .
  • the first end of the spring-damper 8 is attached to the same first corner of the top side of the CM 22 as the spring-damper 1 .
  • the second end of the spring-damper 8 is headed to a point VSC 8.
  • the point VSC 8 is located at the intersection of the vertical symmetry axis of a fourth side wall of the ISAM 21 , said fourth side wall being the other side wall of the ISAM 21 adjacent to the first corner to which the first end of the spring-damper 1 and the first end of the spring- damper 8 are headed, with the horizontal plane P COG which contains the centre of gravity COG of the ISAM 21 .
  • the first end of the spring-damper 2 is attached to a second corner of the top side of the CM 22, the first side wall containing VSC 1 being also adjacent to this second corner.
  • the second end of the spring-damper 2 is headed to a point VSC 2, which is at the same location as the point VSC 1 .
  • the first end of the spring-damper 3 is attached to the same second corner of the top side of the CM 22 as the spring-damper 2.
  • the second end of the spring-damper 3 is headed to a point VSC 3.
  • the point VSC 3 is located at the intersection of the vertical symmetry axis of a second side wall of the ISAM 21 adjacent to the second corner to which the first end of the spring- damper 3 and the first end of the spring-damper 2 are headed, with the horizontal plane P C OG which contains the centre of gravity COG of the ISAM 21 .
  • the first end of the spring-damper 4 is attached to a third corner of the top side of the CM 22, the second side wall containing VSC 3 being also adjacent to this third corner.
  • the second end of the spring-damper 4 is headed to a point VSC 4, which is at the same location as the point VSC 3.
  • the first end of the spring-damper 5 is attached to the same third corner of the top side of the CM 22 as the spring-damper 4.
  • the second end of the spring-damper 5 is headed to a point VSC 5.
  • the point VSC 5 is located at the intersection of the vertical symmetry axis of a third side wall of the ISAM 21 adjacent to the third corner to which the first end of the spring-damper 5 and the first end of the spring-damper 4 are headed, with the horizontal plane PCOG which contains the centre of gravity COG of the ISAM 21 .
  • the first end of the spring-damper 6 is attached to a fourth corner of the top side of the CM 22, the third side wall containing VSC 5 being also adjacent to this fourth corner.
  • the second end of the spring-damper 6 is headed to a point VSC 6, which is at the same location as the point VSC 5.
  • the first end of the spring-damper 7 is attached to the same fourth corner of the top side of the CM 22 as the spring-damper 6.
  • the second end of the spring-damper 7 is headed to a point VSC 7, which is at the same location as the point VSC 8.
  • the suspension layer 23 allows not only for translation movements of the ISAM 21 along any axis, but it also allows for rotation movements of the ISAM 21 around any axis. Moreover, because the virtual spring centres VSC 1 to VSC 4 are in the same plane P C OG as the centre of gravity COG, the rotation movements of the suspended ISAM 21 are minimised.
  • the suspension layer 23 provides a globally optimised solution minimising volume and mass of the ISAM 21 . Indeed, no free space is required inside the suspended ISAM 21 for individual suspensions between the sensors. Antenna and radar systems can be simply hard mounted within the suspended ISAM 21 , thus reducing the volume and mass of each piece of equipment and allowing a low centre of gravity of the suspended ISAM 21 . This is especially important for ship's top side design, as it allows for maximizing installation height and therefore performances for each radar and sensor system.
  • the suspended ISAM 21 can be fully implemented by use of cost- effective COTS, which can be simply integrated based on hard mounted techniques.
  • the mast opening can be mechanically closed using the antenna structure. This allows for a higher integration level where structural parts of sensors are integrated with the structure of the suspended ISAM 1 . This provides a higher structural integrity to the mast in terms of strength and stiffness.
  • the mass of the suspended ISAM 1 is dynamically uncoupled from the ship's super structure. This reduces the dynamic design constraints to ship's superstructure in terms of stiffness, strength and fatigue.
  • the single suspension layer 23 provides natural uncoupling between the ISAM 21 and the CM 22. This allows for different thermal expansions of the ISAM 21 and the CM 22, as well as for the use of different materials for building the ISAM 21 and the CM 22. Moreover, the design of the suspension layer 23 can be globally optimised so as to provide a standard solution for most of the ships. However, depending on specific requirements on a ship, the design of the suspension layer 23 may be tailored while keeping the same equipment interfaces. Indeed, the suspension layer 23 enables keeping stable interfaces to the ISAM 21 , while offering freedom to design interfaces to the CM 22. Thus, even in case of later modifications of the CM 22, modifications of the suspension layer 23 may be limited to a few components.
  • the natural uncoupling between the ISAM 21 and the CM 22 provided by the suspension layer 23 may be regarded as a natural separation between an integrated mast, which comprises sensor equipments, and a standard cabinet module. This allows for easy and flexible adaptation of an integrated mast to various ship classes and sizes, while maintaining a stable configuration of the ISAM 21 . All back-end electronics may be packaged in the standard cabinet module, so as to keep the overall centre of gravity as low as possible and thus provide roll stability and good sea keeping ability.
  • the use of the single suspension layer 23 instead of multiple local suspensions inside the ISAM 21 provides a single combined suspended structure for both the ship structure and the antenna structure. This is a more reliable design, that is to say with a lower failure rate and lower repair times, as it requires less components. The redundancy can be ensured with minimised amount of provisions. For example, all equipments above the suspension layer 23 have the benefit of the hard mounting without the need for flexible EMI sealings and attitude measurement devices.
  • the invention allows uncoupling the ISAM 21 from the dynamic loads from the ships deck 24.
  • the invention allows uncoupling the material selection for the ISAM 21 and the CM22.
  • the invention allows uncoupling the dimensioning of the ISAM21 and the CM22.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Details Of Aerials (AREA)

Abstract

L'invention concerne un appareil permettant d'isoler mécaniquement un premier objet placé au-dessus d'un second objet. L'appareil comprend une pluralité d'amortisseurs à ressort (1, 2, 3, 4, 5, 6, 7, 8). Chaque amortisseur à ressort est agencé de telle manière qu'une de ses extrémités est fixée au second objet (22) et que son autre extrémité est fixée au premier objet (21) et orientée vers un point (VSC) qui est sensiblement dans le plan horizontal contenant le centre de gravité du premier objet, de manière à minimiser les mouvements de rotation du premier objet lorsque le second objet est entraîné dans un mouvement de rotation. Application : conception de bateaux.
PCT/EP2010/070607 2009-12-24 2010-12-22 Appareil permettant d'isoler mécaniquement un objet placé au-dessus d'un autre WO2011076909A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP09180757.8 2009-12-24
EP09180757 2009-12-24

Publications (1)

Publication Number Publication Date
WO2011076909A1 true WO2011076909A1 (fr) 2011-06-30

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ID=43657176

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2010/070607 WO2011076909A1 (fr) 2009-12-24 2010-12-22 Appareil permettant d'isoler mécaniquement un objet placé au-dessus d'un autre

Country Status (1)

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WO (1) WO2011076909A1 (fr)

Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB553793A (en) * 1941-11-29 1943-06-07 Metalastik Ltd Improvements relating to resilient mountings for instruments and machines
GB665079A (en) * 1949-02-21 1952-01-16 Lord Mfg Co Improvements in resilient mounting systems
GB696881A (en) * 1947-02-21 1953-09-09 Mb Mfg Company Inc Improvements relating to the suspension of vibratory bodies
GB1339693A (en) * 1971-05-03 1973-12-05 Schenck Gmbh Carl Two-mass vibratory system
US4153227A (en) * 1975-11-28 1979-05-08 Gamaunt Roger L Fluid self-centering vibration and shock mount
FR2536485A1 (fr) * 1982-11-22 1984-05-25 Girodin Tech Suspension antivibratoire
FR2545443A1 (fr) * 1983-05-03 1984-11-09 Europ Agence Spatiale Dispositif de fixation flexible d'une charge utile sur une surface de support, notamment d'un instrument de haute precision sur un engin spatial
US4848757A (en) * 1988-01-25 1989-07-18 The Charles Stark Draper Laboratory, Inc. Remote center compliance device with fully or partially coil-bound springs
US6022005A (en) * 1996-09-27 2000-02-08 Trw Inc. Semi-active vibration isolator and fine positioning mount
DE10026643C1 (de) * 2000-05-29 2001-10-25 Zeiss Carl Dämpfungseinheit für Präzisionsmaschinen
EP1424507A2 (fr) 2002-11-29 2004-06-02 Thales Nederland B.V. Dispositifs d'accouplement élémentaires et complexes, et leurs utilisations
US20060102825A1 (en) * 2004-11-12 2006-05-18 Harless Richard I Flexure elastomer antenna isolation system
US20070109205A1 (en) * 2005-11-17 2007-05-17 The Boeing Company Antenna vibration isolation mounting system
WO2009029361A1 (fr) * 2007-08-28 2009-03-05 Raytheon Company Procédé et système pour commander le roulis d'un objet
EP2120285A1 (fr) * 2008-05-16 2009-11-18 Hsin-Chi Su Appareil de stabilisation d'antenne

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB553793A (en) * 1941-11-29 1943-06-07 Metalastik Ltd Improvements relating to resilient mountings for instruments and machines
GB696881A (en) * 1947-02-21 1953-09-09 Mb Mfg Company Inc Improvements relating to the suspension of vibratory bodies
GB665079A (en) * 1949-02-21 1952-01-16 Lord Mfg Co Improvements in resilient mounting systems
GB1339693A (en) * 1971-05-03 1973-12-05 Schenck Gmbh Carl Two-mass vibratory system
US4153227A (en) * 1975-11-28 1979-05-08 Gamaunt Roger L Fluid self-centering vibration and shock mount
FR2536485A1 (fr) * 1982-11-22 1984-05-25 Girodin Tech Suspension antivibratoire
FR2545443A1 (fr) * 1983-05-03 1984-11-09 Europ Agence Spatiale Dispositif de fixation flexible d'une charge utile sur une surface de support, notamment d'un instrument de haute precision sur un engin spatial
US4848757A (en) * 1988-01-25 1989-07-18 The Charles Stark Draper Laboratory, Inc. Remote center compliance device with fully or partially coil-bound springs
US6022005A (en) * 1996-09-27 2000-02-08 Trw Inc. Semi-active vibration isolator and fine positioning mount
DE10026643C1 (de) * 2000-05-29 2001-10-25 Zeiss Carl Dämpfungseinheit für Präzisionsmaschinen
EP1424507A2 (fr) 2002-11-29 2004-06-02 Thales Nederland B.V. Dispositifs d'accouplement élémentaires et complexes, et leurs utilisations
US20060102825A1 (en) * 2004-11-12 2006-05-18 Harless Richard I Flexure elastomer antenna isolation system
US20070109205A1 (en) * 2005-11-17 2007-05-17 The Boeing Company Antenna vibration isolation mounting system
WO2009029361A1 (fr) * 2007-08-28 2009-03-05 Raytheon Company Procédé et système pour commander le roulis d'un objet
EP2120285A1 (fr) * 2008-05-16 2009-11-18 Hsin-Chi Su Appareil de stabilisation d'antenne

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