• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a device and a method for reducing a vibration of a particularly transparent plate (2), in particular a pane, in which measured data are recorded from the edge area (4) of the vibrating plate (2) and are dependent on these measured data (6, 6 ', 6 ", 6 '"), the plate (2) is loaded with a compensation oscillation over its edge region (4) such that an at least partial reduction of the oscillation of the plate (2) occurs. In order to create a particularly stable and efficient method, it is proposed that measurement data (6, 6 ', 6 ", 6"') be provided at points (8, 8 ', 8 ", 8"') of the edge region (4) with maximum curvature (MV, M2 ', M3') of vibration modes (M1, M2, M3) of the plate (2) recorded by linear combination of suitable measurement data (6, 6 ', 6 ", 6"') parameters (9 ', 10' , 1V) to at least two oscillation modes (M1, M2, M3) of the plate (2), in dependence on these parameters (9 ', 10', 1V) for each quadrant (15, 16, 17, 18) of the plate (2 ) Vibration components (15 ', 16', 17 ', 18') are calculated on the compensation oscillation and thus each respective quadrant (15, 16, 17, 18) of the plate (2) is loaded for the common formation of the compensation oscillation.
    公开号:AT511225A1
    申请号:T475/2011
    申请日:2011-04-04
    公开日:2012-10-15
    发明作者:
    申请人:Austrian Ct Of Competence In Mechatronics；
    IPC主号:
    专利说明:

    Fax number: +43 577678 4820 PA 4828 LINZ 04/04 / Ί1 19:39 S .: 4 ^ 21 * * »« · < >
    ♦ * · »41 • · * * · ·« • · · t · -1 - (00 078PAT) jel
    The invention relates to a device and a method for reducing a vibration of a particular transparent plate, in particular a disc, taken in the measurement data from the edge region of the vibrating plate and the plate is loaded on the edge region with a compensation vibration in response to these measurement data such that thus a At least partial reduction of the vibration of the plate occurs
    In order to reduce the noise load of an interior through its oscillating window pane, it is known from the prior art (EP 0 964 387 A2) to assume the oscillation to be compensated via sensors and use parameters (frequency, amplitude, phase, etc .) to win. These parameters are then used to calculate a compensation oscillation that is applied to the board via actuators. Through an interference of the two oscillations, a vibration reduction of the disc is achieved, wherein sensors and actuators are arranged in the edge region of the disc. A disadvantage of such a device and such a method are design and Verfahrensaulwand to control the Schwingungskompensati-on. Thus, for each actuator, a drive specific to its position must exist as well as a partial vibration of the compensation oscillation specific to its position must be calculated. In the case of a large number of sensors, this disadvantageously meant, inter alia, a high channel density for the control, high computing power for vibration compensation and, disadvantageously, also complex and time-consuming process sequences. By such devices and methods therefore usually inexpensive and robust solutions for Schwingungskompen-sation are not possible. 04/04/2011 19:42
    No .: R298 P.004 / 021
    Fax Sender: +43 577678 4828 PA 4828 LINZ 84/84/11 19:39 5/21 ·· * «·· · f» «
    • · * · Ψ S .: -2-
    In addition, a method for vibration compensation of beams is known from the prior art, in which a separation of the sensor signals into portions of the individual vibration modes is performed via a modal filtering. Such a method is also known by the technical term method of independent modal space control ("IMSC: Independent Modal Space Control"). This separation of components can be created by a linear combination of two sensor signals, but these sensor signals must be suitable for this, or the sensor signals or measurement data must be taken from suitable locations on the structure. For this purpose sensors are arranged distributed over the beam structure. Although this Modalraumregelung the advantage of the independence of the modes can be exploited with each other, however, the sensor arrangements can lead to Eigenwertverschiebungen, which may be disadvantageous in terms of vibration compensation.
    The invention is therefore based on the object to improve a method for vibration compensation of a particular transparent plate of the type described in such a way that on the one hand steadfast allows a comparatively high extinction of plate vibrations, on the other hand, however, a low process cost, which does not affect the plate, especially their field of vision requires.
    The invention solves this problem by measuring data taken at locations of the edge region with maximum curvature of vibration modes of the plate, determined by linear combination suitable measurement parameters to at least two vibration modes of the plate, depending on these parameters for each quadrant of the plate vibration components to the compensation oscillation are calculated and thus each relevant quadrant of the plate is charged to the common formation of the compensation oscillation.
    If measured data are taken at points of the edge area with maximum curvature of vibration modes of the plate and by linear combination to 04/04/2011 19:43
    No .: R298 P.005 / 021 ♦ 43 57767B 4020 04/04/11 19:39 S .: 6/21
    Pfi 4020 LINZ * * * * 9999 9 * 999 9 * • 99 · · «« * · · · · * * * * * · »·
    If appropriate measurement data are determined for at least two vibration modes of the disk, then the independent mode space control method can also be applied to disks which are sensitive to eigenvalue shifts due to the sensor masses. In addition, this method can also be used with transparent panels, for example panes, glass panes, windshields, etc., because no sensors or actuators have to be provided in the field of vision. As a function of these parameters, it is then possible to calculate vibration components on the compensation oscillation, with only one oscillation component being calculated for each quadrant of the plate for further method simplification. With these vibration components, each relevant quadrant of the plate can then be loaded in order to jointly form the compensation oscillation. With the help of the vibration components for the quadrants of the plate, inter alia, a comparatively high process simplification can be made possible, whereby with considerable robustness rapid vibration damping can be possible. The invention can therefore stand out from the prior art, despite reduced Verfahrensaulwand by a faster and more stable vibration damping, with no optical impairment of the transparency of the plate must be taken into account for this purpose.
    If the quadrants are loaded several times in parallel with the same vibration component, then the method for vibration compensation can be improved, because a more even total load of the quadrants can thus be exploited on account of several points of the plate loaded in parallel.
    The method can be improved if no vibration components are applied to the plate at the points for taking measurement data. Adverse effects of overlays can thus be avoided, which also the stability of the process can be improved.
    If measured data are recorded between two quadrants and their linear combination includes parameters for at least the first three oscillation modes. 04/04/2011 19:43
    No .: R298 P.006 / 021
    Fax sender: +43 S7767B 4B20 PA 4020 LINZ S.: 7221 04204211 19:39 -4- which calculates the plate, in particular the modes with a high proportion of a plate oscillation can be reduced. With a comparatively low process complexity, a particularly robust and efficient vibration compensation can thus be made possible.
    If the amplitudes are determined with the aid of the linear combination, vibration compensation of these modes can be made possible in a quick and simple manner. The dynamics as well as the stability of the method can thus be increased, in particular if in this case the first three vibration modes are taken into account.
    It is a further object of the invention to improve a device for vibration compensation of the type described in a structurally simple manner such that not only a comparatively high efficiency in the vibration compensation is possible, but also a high control dynamics can be achieved.
    The invention achieves the stated object by providing sensors in the edge region at points with maximum curvature of vibration modes, and in that the control device has at least two modal filters connected to the sensors for separating the measurement data into fractions of individual vibration modes of the plate, as well as for each filter Having a connected thereto or with each filter controller for generating controlled variables as a function of the separated portions of the measured data and each associated with at least one actuator of a quadrant switching stages for joining the controlled variables to vibration components of the compensation vibration in dependence of the quadrant-wise control of the actuators.
    If sensors are provided in the peripheral area at locations with maximum curvature of vibration modes, then it can be easily made possible a quick and maximum vibration compensation, if the measurement data of the sensors are used for an independent Modalraumregelung. For this 04/04/2011 19:44
    No .: R298 P. 007/021 «43 577678 402Θ PA 4020 LINZ s. : 8/21 04/04/11 19:39 4 «« I · · 4 · ♦ «* *« -5
    Purpose, the controller sowoht at least two modal filters connected to the sensors for the separation of the measured data in shares of individual vibration modes of the plate, as well as for each filter an associated controller for generating controlled variables as a function of the separated portions of the measured data. In order to create a constructive simplicity in the control of the actuators, it is further proposed to provide switching stages connected to at least one actuator of a quadrant for joining the controlled variables to oscillatory components on the compensation oscillation as a function of the quadrant-wise actuation of the actuators. In contrast to the prior art, therefore, a sufficient compensation vibration can be generated with a comparatively low number of control variables or also on vibration components, which can lead to a comparatively high efficiency in the compensation of mode oscillations or the vibration of the plate. In addition, with the help of the quadrant-wise view or the quadrant-wise application of force to the plate, a fast and thus highly dynamic compensation of the plate vibrations possible, so that the device despite constructive simplicity can have a comparatively high efficiency and high stability.
    Increased force introduction into the plate can be made possible if in each quadrant of the plate an actuator group of parallel and distributed actuators is provided. In addition, it can be used to create a more uniform force input than with a punctual load on the plate.
    In particular, the influences of the decisive eigenmodes of the plate can be detected and compensated for if at least one sensor is provided in each case between two quadrants. In addition, so that the risk of feedback between sensors and actuators can be significantly reduced, which can increase the stability of the device, especially when the sensors are provided on the opposite side of the plate actuators. 04/04/2011 19:44
    No .: R298 P.008 / 021 ♦ 43 S77678 4020 04/04/11 19:39 S .: 9/21
    PA 402Θ LINZ '1 M ···· · Ott .. * • 4 · * · t, · · · · ·. , , ...
    • 1 * * · · t t »I * · · ··· ·· .. ........... -6 -
    If the control device has three modal filters connected to the sensors for vibration compensation of the first three vibration modes of the plate, then it has surprisingly been found that those modes can be reduced which have a decisive influence on a plate vibration. A particularly high efficiency in the vibration compensation can be achieved.
    In order to achieve a damping control of the plate oscillation via the amplitude of oscillation modes, it may be provided that the modal filters have adders and / or subtractors connected to the sensors. Among other things, the parameters of the amplitude can be used to enable a fast and stable device for vibration compensation via, for example, simple downstream proportional elements.
    Particular circumstances can be created when a method for independent Modalraumregelung for vibration compensation of a vibrating plate taking into account both a measurement data recording in the edge region of the plate for the Modalraumregelung, as well as a quadrant wise action on the plate generated depending on the Modalraumregelung vibration components used to jointly form a compensation oscillation becomes.
    For example, the subject matter of the invention is illustrated in the drawings with reference to an exemplary embodiment. Show it
    1 is a plan view of a device for reducing a vibration of a plate,
    2 shows a control device of the device according to FIG. 1 and FIGS. 3 to 5 representations for vibration compensation of different vibration modes of the device according to FIG. 1.
    The Ausführungsbeispiet shown, for example, according to Fig. 1 shows a device 1 for vibration compensation with a plate 2, the front ends 04/04/2011 19:45
    No .: R298 P.009 / 021
    Fax sender: «43 577678 4028 PA 4020 LINZ S.: 10/21 04/04/11 19:39 * · · ·« IM · »* · · * *« «· * * -7- For example, above a not shown Clamping is stored in a frame. Other mounting means are conceivable, as well as a fixed clamping over a bar or a particular soft seal. The plate 2 is capable of oscillating, which among other things also allows undesirable vibrations. In order to reduce these vibrations, actuators 3, 3 ', 3 ", 3"' are provided on the plate 2 in the edge region 4, in order not to reduce the transparency of the plate 2 or a central weight load to avoid the plate 2. The vibration of the plate 2 to be compensated is detected by sensors 5, 5 ', 5 ", 5' " measured, whereby measurement data 6, 6 ', 6 ", 6"' are recorded by this measurement. The sensors 5, 5 5 ", 5 '" are also provided for reasons above on the plate 2 in the edge region 4, preferably on the the actuators 3, 3 ', 3 ", 3' " opposite plate side, which can be seen in the dash-dotted lines of the sensors 5, 5 5 ", 5 '" in the figures. By means of a control device 7, these measurement data 6, 6 ', 6 ", 6'" of the sensors 5, 5 ', 5 ", 5'" are now processed and the actuators 3, 3 3 ", 3 '" in dependence on these Measurement data 6, 6 ', 6 ", 6"' controlled such that these 3, 3 ', 3 ", 3"' on the plate 2 can apply a compensation vibration to reduce the vibration of the plate 2 and the plate 2 in this regard , If a plurality of actuators 3, 3 3 ", 3 '" used, then this can disadvantageously in the controller 7 lead to a high design effort as well as a complex calculation method, which not only reduces the stability, but also the dynamics for vibration reduction can be. For this reason, the invention proposes an independent Modalraumregelung (IMSC) taking into account, on the one hand edge-mounted sensors 5, 5 ', 5 ", 5'" and on the other hand, a quarterly control of the actuators 3, 3 '(3 ", 3'" For this purpose, the sensors 5, 5 ', 5 ", 5'" in the edge region 4 at the points 8, 8 ', 8 ", 8"' with maximum curvature M1 'and / or, M2' and / or M3 'provided by at least two vibration modes M1 and / or M2 and / or M3t, etc., which can be taken in particular in connection with Figures 3, 4 and 5. In general, it is mentioned that quite close to these points M1' and and / or 'M2' and / or M3 'is conceivable, whereby furthermore not at all these locations with maximum curvature M1' and / or M2 'and / or M3' of P.010 / 021 04/04/2011 19:45 no .: R298: 11 ^ 21
    Fax Sender: * 43 S77678 4020 PA 4028 LIMZ 04/04 / H 19.39 S * * * * * ♦ * * # # «« · · * · · · · a * * * · * * «« < »« «, * * · · * · · *» «Ψ» < * «♦♦ *» < -8th-
    Vibration modes M1 and / or M2 and / or M3 sensors 5, 5 ', 5 ", 5' " must be provided in order to create an independent Modalraumregelung (IMSC), as can be recognized, for example, the same sensor placement despite different eigenmodes Ml, M2 and M3 according to Figures 3, 4 and 5, according to Flg. 2 of the device 1 is now connected to the sensors 5, 5 ', 5 ", 5" * and processes the measurement data 8, 6 6 ", 6'". For this purpose, 5, 5 ', 5 ", 5'" connected to modal filters 9, 10, 11, the measurement data 6, 6 ', 6 ", 6'" in shares 9 ', 10', 11 'single By using 3 modal filters 9, 10, 11, vibration compensation of the first three vibration modes Mt, M2, M3 of the disk 2 can be made possible. These portions 9 ', 10', 11 'of the modal filter 9, 10, 11 are now each a controller 12, 13,14 supplied, each having a controlled variable 12', 13 ', 14' for damping these shares 9 ', 10th ', 11' generate. In order to be able to supply a respective vibration component 15 ', 17', 18 'and 19' to each of the squares 15, 16, 17 and 18 of the plate 2, switching stages 19, 20, 21, 22 are provided which control variables 12 ', 13 ', 14' connect in the correct polarity. The switching stages 19, 20, 21, 22 therefore add the controlled variables 12 ', 13', 14 'to oscillation components 15', 16 ', 17' and 18 'to the compensation oscillation as a function of the quadrant-wise actuation of the actuators 3, 3', 3 ", 3" 'together.
    The controller 7 also has inverter 23 and ADC (analog-to-digital converter) 24 and DAG (digital-to-analog converter) 25, wherein the regulator 12, 13, 14 are designed as a P-controller for simplicity. High- and / or low-pass filters may accompany these regulators 12, 13, 14 in order to sharpen the components 9 ', 10', 11 'to the oppositely controlled modes M1, M2, M3, these filters not being shown for the sake of simplicity.
    In general it is mentioned that according to the figures three modes M1, M2, M3 are subjected to a modal regulation, but it is quite within the scope of the invention to treat fewer or more modes with it. In particular, for example, sensors 5 and 5 alone could " to the independent Modairaumregelung 04/04/2011 19:45
    No .: R298 P.011 / 021
    Fax Sender: +43 S77678 4020 PA 4020 LINZ 04/04/11 19:39 S .: 12/21 * »·· *« · 0 fit «| t * * i · · · | · * ·· * * «I ··» · * · »f * *« · * »| Of the modes M1 and M2 or alone the sensors 5 'and 5 "' are used for the independent modal space control of the modes M1 and M3.
    A more uniform application of force to the plate 2 for purposes of improved vibration reduction results when in each quadrant 15,16,17 and 18 of the plate 2, an actuator group 26, 27, 28 and 29 of parallel and distributed actuators arranged 3, 3 ', 3 ", 3" 'is provided. The actuators of the respective actuator groups are arranged distributed on the edge of the plate 2, so that they extend, for example, around the corners of the plate 2. The number of actuators 3, 3 3 ", 3 " ' is freely selectable and can be determined, for example, by the force magnitude to be generated.
    High stability in the control results when between each two quadrants 15 and 16 or 16 and 17 or 17 and 18 or 18 and 15, a sensor 5, 5 ', 5 ", 5"' is arranged, as this particular of Fig. 1 can be removed. In addition, at least vibrations of three modes M1, M2, M3 can be compensated for. The sensors 5, 5 ', 5 ", 5'" are structurally simple on the actuators 3, 3 ', 3 ", 3'". opposite plate side of the plate. 2
    The modal filters 9, 10, 11 comprise adders 30 and / or subtracters 31, in order thereby to reduce the amplitude 32, 33, 34 of the oscillation of the individual modes M1. To determine M2 and M3. By such a signal combination, however, the amplitude 32, 33, 34 must be adjusted to an averaged value, on the basis of which the proportional terms 35 (reduction to 1/4 of the determined amplitude level) and 36 (reduction to 1/2 of the determined amplitude level) are provided as can be seen in FIG. 2. 04/04/2011 19:46
    No .: R298 P.012 / 021
    权利要求:
    Claims (11)
    [1]
    Fax Sender: +43 577678 4020 PA 4020 LINZ S .: 13/21 04/04/11 19:39 Fax Sender: +43 577678 4020 PA 4020 LINZ S: 13/21 04/04/11 19:39 * ·· * * · (00 078PAT)] el 00 I «li« if 0 * * · t «0 I · f« * «* · * * t« t < • • * * * · a • · · · «9 m Patent Attorney Dipl.-lng. Friedrich Jell Hittmairstraße 11, A-4020 Linz Claims: 1. A method for reducing a vibration of a particular transparent plate (2), in particular a disc, recorded in the measurement data from the edge region (4) of the vibrating plate (2) and in dependence of these measurement data (6, 6 ', 6 ", 6" 1) the plate (2) is loaded with a compensation oscillation over its edge region (4) such that an at least partial reduction of the oscillation of the plate (2) occurs, characterized in that Measurement data (6, 6 6 ", 6 '") at locations (8, 8', 8 ", 8 '") of the edge region (4) with maximum curvature (MV, M2 M3') of vibration modes (M1 , M2, M3) of the plate (2), by linear combination of suitable measurement data (6, 6 ', 6 ", 6"'), parameters (9 ', 10 1V) for at least two vibration modes (M1, M2, M3) of the plate (2) determines, as a function of these parameters (9 *, 10 *. 11 '), for each quadrant (15, 16, 17.1 8) of the rat (2) oscillation components (15 ', 16', 17 ', 18') are calculated on the compensation oscillation, and thus each quadrant (15, 16, 17, 18) of the plate (2) for common formation of the compensation oscillation is charged.
    [2]
    2. The method according to claim 1, characterized in that the quadrants (15, 16, 17, 18) with the same vibration component (15 ', 16', 17 ', 18') are loaded several times in parallel.
    [3]
    3. The method according to claim 1 or 2, characterized in that at the points (8, 8 ', 8 ", 8'") for receiving measurement data (6, 6 ', 6 ", 6'") no vibration components ( 15 ', 16', 17 ', 18') are placed on the plate (2).
    [4]
    4. The method according to claim 1, 2 or 3, characterized in that in each case between the two quadrants (15 and 16, 16 and 17, 17 and 18, 18 and 15) 04/04/2011 19:46 No: R298 P .013 / 021 Fax sender: * 43 S77678 4020 PA 4020 LI HZ 04/04/11 19:39 S .: 14/21 - 2 - Measurement data (6, 6 6 ", 6" ') recorded and their linear combination parameters (9 10 ', 11') to at least the first three modes of vibration (M1, M2, M3) of the plate (2) are calculated,
    [5]
    5. The method according to any one of claims 1 to 4, characterized in that with the aid of the linear combination, the amplitudes (32, 33, 34) of the particular first three vibration modes (M1, M2, M3) are determined.
    [6]
    6. Apparatus for reducing a vibration of an at least partially clamped and in particular at least partially transparent plate (2), in particular a disc with over at least in the edge region (4) of the plate (4) provided actuators (3, 3 ', 3 ", 3 '"), In particular piezo elements, with sensors (5, 5', 5", 5 '") provided in the edge region (4) of the plate (2) for taking measurement data (6, 6', 6", 6 '"). ) to the plate oscillation and to a control device (7) connected to the sensors (5, 5 ', 5 ", 5"') and actuators (3, 3 ', 3 ", 3"') for generating one of the recorded measurement data ( 6, 6 6 ", 6" ') dependent compensation vibration for reducing the vibration of the plate, characterized in that sensors (5, 5', 5 ", 5" ') in the edge region (4) at points with maximum curvature (M1 ', M2', M3 ') of vibration modes (M1, M2, M3) are provided, and that the control device (7) is both least s two modal filters (9, 10, 11) connected to the sensors (5, 5 ', 5 ", 5'") for separating the measured data (6, 6 6 ", 6" ') into components (9', 10 ', 11') of individual vibration modes (Ml, M2, M3) of the plate (2), as well as for each filter (9, 10, 11) an associated controller (12, 13, 14) for generating controlled variables (12 ', 13', 14 ') depending on the separated portions (9', 10 ', 11') of the measured data (6, 6 6 ", 6 '") and each with at least one actuator (3, 3', 3 ", 3 '") of a quadrant (15, 16, 17, 18) connected switching stages (19, 20, 21, 22) for joining the control variables (12', 13 ', 14') to vibration components (15 ', 16 ', 1T, 18') at the compensation oscillation in dependence of the quadrant-wise actuation of the actuators (6, 6 ', 6 ", 6'"). 04/04/2011 19:47 No .: R298 P.014 / 021 +43 577678 4020 PA 4020 LINZ S: 15/21 04/04/11 19:39 »0« * 9 · «·« * ·· + ·· 9 * ·· · I ψ »-3-
    [7]
    7. The device according to claim 6, characterized in that in each quadrant (15, 16, 17, 18) of the plate (2) an actuator group (26, 27, 28, 29) of parallel shaded and distributed actuators arranged (3, 3 ', 3 ", 3'") is provided.
    [8]
    8. Apparatus according to claim 6 or 7, characterized in that in each case between two quadrants (15 and 16, 16 and 17, 17 and 18, 18 and 15) at least one sensor (5, 5 ', 5 ", 5' " ), in particular on the actuators (3, 3 ', 3 ", 3"') opposite plate side, is provided.
    [9]
    9. Apparatus according to claim 6, 7 or 8, characterized in that the control device (7) has three connected to the sensors (5, 5 ', 5 ", 5" *) modal filter (9, 10, 11) for vibration compensation of first three vibration modes (M1, M2, M3) of the plate (2).
    [10]
    10. Device according to one of claims 6 to 9, characterized in that the modal filter (9, 10, 11) with the sensors (5, 5 ', 5 ", 5"') connected adders (30) and / or subtractors (31).
    [11]
    11. Use of a method for independent Modalraumregelung for vibration compensation of a vibrating plate (2) taking into account both a measurement data recording in the edge region (4) of the plate (2) for the Modalraumregelung as well as a quadranteweise admission of the plate (2) generated depending on the Modalraumregelung Vibration components (15% 16 ', 17', 16 ') for the common formation of a compensation oscillation. 04/04/2011 19:47 No R298 P.015 / 021
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    引用文献:
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    US10959035B2|2018-08-02|2021-03-23|Bongiovi Acoustics Llc|System, method, and apparatus for generating and digitally processing a head related audio transfer function|
    法律状态:
    2013-04-15| HA| Change or addition of new inventor|Inventor name: NADER MANFRED DIPL.ING. DR., Effective date: 20130222 Inventor name: GERSTMAYR JOHANNES PRIV.-DOZ. DIPL.ING. DR., AT Effective date: 20130222 Inventor name: BERGER WOLFGANG DIPL.ING., BA Effective date: 20130222 |
    2017-12-15| MM01| Lapse because of not paying annual fees|Effective date: 20170404 |
    优先权:
    申请号 | 申请日 | 专利标题
    ATA475/2011A|AT511225B1|2011-04-04|2011-04-04|DEVICE AND METHOD FOR REDUCING A VIBRATION OF AN IN PARTICULAR TRANSPARENT PLATE|ATA475/2011A| AT511225B1|2011-04-04|2011-04-04|DEVICE AND METHOD FOR REDUCING A VIBRATION OF AN IN PARTICULAR TRANSPARENT PLATE|
    EP12163205.3A| EP2509069A3|2011-04-04|2012-04-04|Device and method for reducing a vibration of a board, in particular a transparent board|
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