• 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:

    公开号:AT510243A2
    申请号:T0166211
    申请日:2011-11-10
    公开日:2012-02-15
    发明作者:
    申请人:Avl List Gmbh；
    IPC主号:
    专利说明:

    * t · · * ··· «· * # ·
    AV-3449 AT ** «* * * * * · ··· · · 1 * 1« «* * * * ··· * *
    Test rig arrangement and method for operating such a test rig arrangement
    The invention relates to a test rig arrangement for at least one test object, which comprises at least one actuator for acting on the test object, at least one sensor for detecting measured values, as well as a support structure for the test object, and a method for operating such a test bed arrangement, in which at least one Sensor measured values of at least the test object, preferably also the test rig arrangement and / or the environment are detected.
    When testing on a test bench, the real conditions should of course be reproduced as best as possible. In this regard, improved correlation between the ratios of engines, components or the like when used in, for example, a real vehicle and on the other hand, in a test rig arrangement provides more realistic test results and also avoids unexpected errors and disturbances in real operation. This also makes it possible to improve the design of the vehicle components for better performance and durability.
    The object of the present invention was therefore a test rig arrangement and a method for operating it, with which the above objects can be achieved.
    To achieve this object, the test rig arrangement according to the invention is characterized in that at least one element which is adjustable in at least one vibration-relevant property is interposed between at least one pair of elements of the test rig arrangement and / or of the test object which are capable of oscillating relative to one another. In this way, any desired vibration state between the test rig arrangement and the test object can be adjusted, for example in order to permanently shift resonance frequencies into a non-critical range.
    According to a particularly advantageous embodiment, the adjustable element is adaptively changeable in at least one vibration-relevant property by a control device. In such an active embodiment, the vibration state during operation can be changed, for example, to allow a basic design of the resonance regions and to keep the passage of resonance areas short. Furthermore, the possibility of specific vibration states, e.g. as in real driving conditions, to simulate the test bench.
    One possible embodiment with regard to the arrangement provides that the element is interposed between the test object and the test rig arrangement.
    AV-3449 AT
    According to another or additional embodiment, it can also be provided that the element serves to support at least one element of the test rig arrangement.
    A further embodiment is characterized in that the element is provided in at least one bearing arrangement of at least one part of the test rig arrangement and / or of the test object.
    Also an embodiment is expedient in which the element between the test specimen and at least one acting on the specimen actuator is interposed.
    It is advantageous if, according to an optional feature of the invention, the control device alters the oscillation-relevant property of the element as a function of at least one parameter of the specimen or test bench arrangement which is variable during operation.
    Advantageously, it is provided that in the control device a determined in normal operation course of the vibrations of the test piece or at least a portion of the test rig is stored in dependence on the at least one variable in operation parameter that at least one sensor is provided for the vibrations, and that Control circuit is provided, via which the vibration-relevant property of the element is changed such that the vibrations in response to the at least one parameter corresponds to the stored in the control device course of the vibrations. This means that any vibrations recorded in the real vehicle can also be traversed on the test bench.
    Alternatively, however, an embodiment could also be expedient in which a model for the course of the vibrations of the test piece or at least a part of the test rig arrangement as a function of the at least one parameter which can be changed during operation is known for test runs or other real sources in the control device is stored, that at least one sensor is provided for the vibrations, and that a control loop is provided, via which the vibration-relevant property of the element is changed such that the vibrations in dependence of the at least one parameter corresponding to the course according to the model, this model for the course of the vibrations preferably takes into account the mutual interactions in the context of a multi-body model.
    A first advantageous embodiment of an adjustable element according to the invention is characterized in that the element has at least one elastic element clamped between two bushes with adjustable pretension, preferably a metal mesh, in particular an all-metal cushion. Thus, as schwin- * * * * «* * ·· * ·« ·
    AV-3449 AT • · * * * * t «· * *« «ti« ··· · · i * t • 3 "" 4 * ············································································································································································································· low effort using the same element to adjust the desired state of vibration of the test bench sample assembly, in which the stiffness of the elastic element, with either progressive or degressive force-displacement curve, is changed by changing the bias voltage. This can be effected for example by pressing in another bearing sleeve with a different diameter. Metal moldings, in particular all-metal cushions, show as further advantages no signs of aging and thus no undesirable changes in stiffness and damping properties over time, as well as independence from temperature and exciter frequency.
    According to an alternative embodiment, however, it may also be provided that the element is constructed using an electro-or magnetorheological fluid.
    A further alternative embodiment provides that the element comprises a hydraulic system with variable cross section and / or internal pressure.
    When operating such a test rig arrangement as described in the preceding paragraphs is provided according to the invention for solving the object, that the oscillations between at least one pair of mutually oscillatory elements of the test rig and / or the DUT are influenced by at least one adjustable element.
    An advantageous continuation of this basic invention idea is characterized in that at least one of the vibration-relevant properties of the element is adaptively changed, possibly also during a test run.
    According to a further embodiment variant, it is provided that at least one vibration-relevant property of the element is changed as a function of at least one parameter of the test stand arrangement and / or of the test object which is variable during operation.
    Thus, for example, the vibrations between at least one pair of mutually oscillatory elements of the test rig and / of the test specimen can be determined, and at least one vibration-relevant property of the element is changed such that the vibrations in dependence of the at least one parameter follow a predefined course.
    An equally possible alternative according to the invention is characterized in that the vibrations between at least one pair of mutually oscillatory elements of the test rig and / of the test specimen are determined, and that at least one vibration relevant property of the element is changed such that the vibrations in dependence of at least one Parameter corresponds to a predetermined course by a model, the model for the course of the vibrations preferably takes into account the mutual interactions in the context of a multi-body model.
    In order to avoid resonance problems of the test rig arrangement, an embodiment of the invention is provided in which at least one vibration-relevant property of the element is changed such that the critical frequency of the test rig, including the test object, lies outside the current frequency range at any time.
    Advantageously, the change of the vibration-relevant property of the element takes place faster than any change in the frequency of the vibrations of the specimen and / or the test rig arrangement,
    In the following description, the invention will be explained in more detail by means of examples, which refer to the accompanying drawings.
    FIG. 2 a is a side view and FIG. 2 b is a sectional view of a bearing arrangement according to the invention, FIGS. 3 a and 3 b are a side view and a sectional view of a further embodiment of a bearing arrangement and FIG Fig. 4 is a diagram showing a representation of three vibration profiles achievable with a different set bearing arrangement.
    On a test rig arrangement as shown in Fig. 1, a motor 1 is mounted as a test object. The measures provided for acting on the test specimen actuator as well as sensors for detecting measured values of the test specimen 1, possibly also of its environment and the test rig itself, is not shown for clarity and is not relevant to the invention. The test rig arrangement shown has a support structure 2 for the test specimen 1, which in the example shown comprises a bearing arrangement comprising four bearings 3.
    At least one bearing arrangement 3 of the test object 1, shown in detail in FIGS. 2 a to 3 b, has at least one element 4, which can be adjusted by a control device in at least one vibration-relevant characteristic, preferably even an adaptively changeable one. Other or complementary possibilities for installing such adjustable elements 4 would be quite generally all pairs of mutually oscillatory elements of the test rig and / or the test piece 1, such as between the test piece 1 and test stand arrangement, in particular the support structure 2, further in the storage of at least one element of Test rig arrangement itself or between the test specimen 1 and at least one acting on the specimen 1 actuator. So that ♦♦ · · «······· ··
    It is possible to determine the oscillations between at least one pair of mutually oscillatable elements of the test rig arrangement and / or of the test object 1 by means of at least one of the elements which can be adjusted in at least one oscillation-relevant property or which can also be changed adaptively 4 to influence. An example of the possible type of influencing is shown in FIG. 4, in which three different vibration characteristics over the rotational speed of a test object 1 are plotted due to different rigidity and / or damping of at least one element 4.
    A first possibility for influencing the vibration properties within the test rig arrangement with or without test specimen 1 is a one-time adjustment of the rigidity and / or damping properties of the element 4. Particularly advantageous, however, is the automatic adjustment or change or adaptive change of at least one vibration-relevant property of the element 4 at the beginning or during the test run by signals from a control device.
    In order to achieve the optimum setting at any time and for every situation, the at least one vibration-relevant property of the elements 4 is changed as a function of at least one parameter of the test object 1 or of the test rig arrangement that is variable during operation. For this purpose, in the control device, a course of the vibrations of the test piece 1 or at least part of the test rig arrangement, for example the support structure 2 for the test piece 1, determined in normal operation, is advantageously stored as a function of the at least one variable parameter during operation. Furthermore, a sensor for the vibrations is provided, either anyway contained in the sensor system of the test rig or separately installed only for the adjustment of the elements 4, in particular in the range of the test piece 1 or its support structure 2, and a control loop, via which the vibration-relevant property of Elements 4 is changed such that the vibrations in response to the at least one parameter corresponds to the stored in the control device course of the vibrations.
    If the exact course of the vibrations for the specific structure could not be determined in advance from real experiments, a model for the course of the vibrations of the test piece 1 or at least part of the test rig arrangement can be stored in the control device as a function of the at least one variable parameter during operation be, over an identical control loop as just described, the elements 4 are adapted such that the vibrations in dependence on the at least one parameter corresponding to the course according to the model. This model may advantageously take into account the mutual interactions in the context of a multi-body model. ♦ · · 4 · ** ·· «·· 4 4
    AV-3449 AT »444 * ·» 4 4 * 4 »4 · 4 4 4 4 * · ♦ 4 444» • 6 ·· # 44 »« * mm
    In order to avoid resonance problems of the test rig, the vibration-relevant property of the element 4 can be changed such that the critical frequency of the test rig, preferably the support structure 2 for the test specimen 1 including the specimen 1 itself, outside the range of the respective current frequency of the vibrations lies. Advantageously, it is provided that the vibration-relevant property of the element 4 are changed during a change in the frequency of the vibrations within a smaller period of time relative to this change. For example, When commissioning a machine in which the machine must be started from a subcritical to a supercritical speed range, to keep the dangerous dwell time in the critical range as short as possible, the controllable-variable rigidity is to set the critical speed currently present in the system in that it is above a nominally critical speed in the subcritical rotational speed range, and that, starting at a rotational speed above the nominally critical rotational speed, the currently occurring critical rotational speed is shifted below the nominally critical rotational speed, the transition from one critical speed to another rapidly occurring, quasi abruptly - at least faster than the usual residence time of the machine in the critical speed range would be.
    In other words, a high critical frequency is to be set at low excitation frequencies, and at high excitation frequencies, a low critical frequency is to be set, with a rapid, possibly sudden transition from one critical frequency to another.
    The respectively set critical frequency can possibly. be continuously adapted to the current excitation frequencies to produce the desired optimum system properties at each operating point.
    The bearing assembly 3 according to the invention shown in Fig. 2a and 2b comprises a suspension 5 of the test piece 1, which is connected to another of the mutually oscillatory parts of the structure, here the base 6. Micht necessarily be provided between the suspension 5 and base 6 of the support structure 2 interposed arrangement of the screw connection 7 with the damper 8, which has the advantage of being able to adjust the radial stiffness of the bearing assembly 3 directionally.
    In the bearing assembly 3, the adaptively variable element 4 is mounted on an axis 9, which, for example, a first socket 10 with mounting flange for the DUT 1, a second socket 11 screwed therein, for example, and at least one interposed between the bushes 10, 11 and the axis elastic element 12 is made. For this element 12, a metal mesh is advantageously selected, in particular a ring made of an all-metal cushion or a plurality of such cushion segments, which together form a ring surrounding the inner bushing 11.
    By dimensioning the elastic element 12 and the bushings 10, 11, in particular by their diameter and relative dimensions, the preload in the elastic element 12 and thus a desired stiffness and / or damping in the element 4 can be easily and quickly adjusted. In addition to the influence of the diameter of the bushes 10,11 on the bias of the element 12, this is also determined by the force exerted by the bushes 10, 11 due to their screwing in the axial direction of the element 12. Due to the total of all components present bias, in conjunction with the progressive or degressive force-displacement curve of the elastic element, the stiffness and / or damping is set.
    With active execution of the element 4, a basic adjustment of the rigidity and damping is made by the factors mentioned above, wherein an adaptive change of at least one vibration-relevant property of the element 4 by variable during the test run influences on the element 12 is possible. Thus, for example, by a variable during the test run screw between the two sockets 10, 11, a change in the bias of the elastic member 12 is possible. As shown in Fig. 3a and 3b, the screw between the sockets 10, 11, for example, by a drive assembly 15, 16, 17 are automatically adjusted during the test run. To this end, the drive arrangement may comprise an electric motor 15, which acts on an external toothing 17 of the bushing 11 via a shaft with a toothed wheel 15 and thus alters the forces acting on the elastic element 12 by the screw connection. However, a force determining the prestress between the bushes 10, 11 could also be applied, for example, hydraulically, magnetically, electrically, piezoelectrically, or the like.
    The basic principle is actually based on the application of radial forces to the element 12 and the resulting variable stiffness of this element 12. The arrangement shown in Fig. 2b is a possible variant, applied by the formed as a pressure flange bushing 11 axial forces on wedge-shaped ring clamping elements which deflect the axial force in the radial direction and act on the element 12. Other possible arrangements would be e.g. the application of a hydraulic pressure between the sleeve 10 and element 12th
    Finally, by one each in the screw connection 7 or in a separate receptacle 13, which is also secured with a damper in the suspension 5, mounted and adjustable by servo motor or hydraulic drive during the test run pin 14 an axial bias of the element 8 become.
    Instead of the elastic element 12, the adaptively variable elements 4 may be constructed using an electro- or magnetorheological fluid, or at best may also include a hydraulic system of variable cross section and / or internal pressure for varying the stiffness and damping.
    In a simple embodiment, the adaptively variable elements 4 have a linear characteristic. On the other hand, however, the progressivity or degressivity of the characteristic curve can also be exploited in a targeted manner in order to change the rigidity via the prestressing of the elements 12.
    权利要求:
    Claims (19)
    [1]
    1. Test rig arrangement for at least one test specimen (1), which comprises at least one actuator for acting on the specimen, at least one sensor for detecting measured values, and a support structure (2) for the specimen (1), characterized in that at least an adjustable in at least one vibration relevant property element (4) between at least one pair of mutually oscillatory elements of the test rig and / of the test specimen (1) is interposed.
    [2]
    2. test stand arrangement according to claim 1, characterized in that the adjustable element (4) is adaptively changeable in at least one vibration-relevant property by a control device.
    [3]
    3. test stand arrangement according to one of claims 1 or 2, characterized in that the element (4) between the test piece (1) and test rig arrangement is interposed.
    [4]
    4. test stand arrangement according to one of claims 1 or 2, characterized in that the element (4) for supporting at least one element of the test rig arrangement is used.
    [5]
    5. test stand arrangement according to one of claims 1 or 2, characterized in that the element (4) in at least one bearing assembly (3) is provided at least a portion of the test rig and / or the test piece (1).
    [6]
    6. test stand arrangement according to one of claims 1 or 2, characterized in that the element (4) between the test specimen (1) and at least one on the test specimen (1) acting actuator is interposed.
    [7]
    7. test stand arrangement according to one of claims 1 to 6, characterized in that the control device changes the vibration-relevant property of the element (4) in dependence on at least one variable in operation parameters of the test piece (1) or the test rig arrangement. • AV-3449 AT
    [8]
    8. test stand arrangement according to claim 7, characterized in that in the control device a determined in normal operation course of the vibrations of the test piece (1) or at least a portion of the test rig is stored in dependence on the at least one variable in operation parameter that at least one sensor for the vibration is provided, and that a control loop is provided, via which the vibration-relevant property of the element (4) is changed such that the vibrations in dependence on the at least one parameter corresponds to the stored in the control device course of the vibrations.
    [9]
    9. test stand arrangement according to claim 7, characterized in that in the control device a model for the course of the vibrations of the test piece (1) or at least a part of the test rig in dependence on the at least one variable in operation parameter is stored, that at least one sensor for the vibration is provided, and that a control loop is provided, via which the vibration-resistant property of the element (4) is changed such that the vibrations in dependence on the at least one parameter corresponding to the course according to the model, this model for the course of the vibrations preferably considers the mutual interactions in the context of a multi-body model.
    [10]
    10. A test rig arrangement according to one of claims 1 to 9, characterized in that the element (4) has at least one clamped between two sockets (10, 11) with adjustable bias elastic element (12), preferably a metal mesh, in particular an all-metal pad.
    [11]
    11. Test rig arrangement according to one of claims l to 9, characterized in that the element (4) is constructed using an electro-or magnetorheological fluid.
    [12]
    12. Test rig arrangement according to one of claims 1 to 9, characterized in that the element (4) comprises a hydraulic system with variable cross section and / or internal pressure.
    [13]
    13. A method for operating a test rig arrangement according to one of claims 1 to 12, in which at least one sensor records measured values of at least the test object (1), preferably also the test rig arrangement and / or the surroundings. "··· AV-3449 AT ·······" t * "ltt * ··" • · «I Ψ m * · t * I · Μ * · · are characterized in that the oscillations between at least one Pair of mutually oscillatory elements of the test rig assembly and / of the DUT (1) by means of at least one adjustable element (4) can be influenced.
    [14]
    14. The method according to claim 13, characterized in that at least one of the vibration-relevant properties of the element (4) is adaptively changed, possibly also during a test run.
    [15]
    15. The method according to claim 14, characterized in that at least one vibration-relevant property of the element (4) is changed as a function of at least one variable in operation parameter of the test rig and / of the test specimen (1).
    [16]
    16. The method according to claim 14 or 15, characterized in that the vibrations between at least one pair of mutually oscillatory elements of the test rig and / of the test specimen (1) are determined, and that at least one vibration-relevant property of the element (4) is changed in such a way in that the vibrations follow a predefined course as a function of the at least one parameter.
    [17]
    17. The method according to claim 14 or 15, characterized in that the vibrations between at least one pair of mutually oscillatory elements of the test rig and / of the test specimen (1) are determined, and that at least one vibration-relevant property of the element (4) is changed in such a way in that the vibrations as a function of the at least one parameter correspond to a course given by a model, the model for the course of the vibrations preferably taking into account the mutual interactions in the context of a multi-body model.
    [18]
    18. The method according to claim 14, characterized in that at least one vibration-relevant property of the element (4) is changed such that the critical frequency of the test rig including test specimen (1) at any time outside the current frequency range
    [19]
    19. The method according to claim 18, characterized in that the change of the vibration-relevant property of the element (4) is faster than any

    AV-3449 AT the frequency of the vibrations of the test piece (1) and / or the test rig arrangement.
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    同族专利:
    公开号 | 公开日
    AT510243B1|2012-09-15|
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    EP2776807A1|2014-09-17|
    WO2013068202A1|2013-05-16|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    JP2617715B2|1987-04-17|1997-06-04|株式会社ブリヂストン|Damping coefficient control device for vibration isolator|
    DE69229747T2|1991-02-06|1999-12-02|Honda Motor Co Ltd|Vibration system for motor vehicles|
    US6304829B1|1999-02-22|2001-10-16|Ford Global Technologies, Inc.|Method and system for dynamic testing of a vehicle exhaust system in a rigid frame test fixture|
    DE102009000088B4|2009-01-08|2011-07-07|Ford Global Technologies, LLC, Mich.|Arrangement and method for reducing vibrations of an internal combustion engine|CN105222974B|2014-06-06|2018-03-09|上海新力动力设备研究所|Engine vertical vibration test tool mounting platform|
    DE102016101838A1|2016-02-03|2017-08-03|Knorr-Bremse Systeme für Schienenfahrzeuge GmbH|Device and method for force measurement for a brake force test stand|
    DE102016206146A1|2016-04-13|2017-10-19|Bayerische Motoren Werke Aktiengesellschaft|Testing vehicle parts|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA1662/2011A|AT510243B1|2011-11-10|2011-11-10|TEST STAND ASSEMBLY AND METHOD FOR OPERATING SUCH TEST STAND ASSEMBLY|ATA1662/2011A| AT510243B1|2011-11-10|2011-11-10|TEST STAND ASSEMBLY AND METHOD FOR OPERATING SUCH TEST STAND ASSEMBLY|
    EP12780692.5A| EP2776807B1|2011-11-10|2012-10-15|Test bench arrangement and method for operating such a test bench arrangement|
    PCT/EP2012/070365| WO2013068202A1|2011-11-10|2012-10-15|Test bench arrangement and method for operating such a test bench arrangement|
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