JP2008128665A - Vibration test method, vibration test auxiliary device, and vibration test system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration test system capable of exciting simultaneously in each direction of xyz-axes of a test body only by a vibration test in one direction, and exciting to acquire desired accelerations in each direction of the xyz-axes of the test body, by using a uniaxial vibration testing device. <P>SOLUTION: This device is equipped with a test body mounting tool 30 on which the test body is mounted; a vibration stand mounting tool 20 formed to have a shape wherein a loading surface of the test body is tilted, and having a bolt mounting hole 21 for mounting a bolt on a vibration stand 12 and a bolt mounting hole 22 for mounting the test body mounting tool 30 on the loading surface so that each direction of the xyz-axes of the test body is in the tilted state as much as a prescribed angle respectively to each direction of the xyz-axes of the vibration stand 12; acceleration adjusting devices 41A, 41B for adjusting each acceleration in the yz-axis directions of the test body mounted on the vibration stand mounting tool 20 through the test body mounting tool 30; and an acceleration adjusting control device 40 for controlling the acceleration adjusting devices 41A, 41B. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to a vibration test method, a vibration test auxiliary device, and a vibration test system. More specifically, the present invention relates to a vibration test method, a vibration test auxiliary device, and a vibration test in which a certain vibration is applied to an electronic device or the like to examine its influence. About the system.

Conventionally, as one of the reliability evaluation test methods for electronic devices such as audio products, a vibration test device is used to check and verify the vibration resistance and durability performance of electronic devices by applying constant vibration to the electronic devices. Has been done.

In this vibration test, it is necessary to apply vibration to each direction of the XYZ axis of a device under test such as an electronic device. For example, vibration is performed using a uniaxial vibration test apparatus having a vibration function in one direction. When conducting the test, first, the vibration direction of the shaking table on which the device under test is installed, and the X axis (
For example, the test object is fixed on the vibration table so that the direction of the test object is the same as the X direction of the test object.
Excitation is performed in a predetermined condition in the axial direction. Next, the excitation direction of the vibration table and the Y-axis (left and right) direction of the DUT are matched, that is, the DUT is 90 ° in the horizontal direction. After rotating and re-attaching to the vibration table, excitation under a predetermined condition is performed in the Y-axis direction of the DUT. Further, the direction of the vibrator is adjusted so that the vibration direction by the vibrator is vertical, for example, so that the vibration direction of the shaking table and the Z-axis (vertical) direction of the DUT coincide. In other words, after reattaching the device under test on the vibration table, the device under test is vibrated under a predetermined condition in the Z-axis direction, and then the performance of the device under test is confirmed and verified.

In the conventional vibration test method using such a uniaxial vibration test apparatus, the vibration of the DUT in each direction of the XYZ axes is performed by changing the mounting position and orientation of the DUT and the vibrator. In addition, it takes a lot of time to attach / remove the device to / from the shaking table, and to perform vibration tests for several tens of hours per direction. There was a problem that test efficiency was bad.

Therefore, there are multi-axis vibration test devices such as a biaxial vibration test device with a vibration function in two directions and a triaxial vibration test device with a vibration function in three directions as well as a vibration function in one direction. Although it has been developed, the multi-axis vibration test equipment is very expensive compared to the uniaxial vibration test equipment, and the equipment becomes larger due to the increase in the direction of excitation, requiring a large installation space. There was a problem.

On the other hand, in Patent Document 1 below, an xyz axis of a device under test is used without changing the mounting position of the device under test in a single vibration test using a biaxial vibration test apparatus having a vibration function in two directions. However, the uniaxial vibration test apparatus is used to simultaneously excite the three directions of the xyz axis of the device under test so that a desired acceleration is obtained in each direction. No proposed technology is known.
Japanese Patent Laid-Open No. 4-332839

Means for solving the problems and their effects

The present invention has been made in view of the above-described problems, and using a vibration test apparatus having a vibration function in one direction, only the vibration test in one direction can be performed simultaneously in each direction of the xyz axis of the device under test. To provide a vibration test method, a vibration test auxiliary device, and a vibration test system that can be vibrated and can be vibrated so that a desired acceleration is obtained in each direction of the xyz axis of the device under test. It is an object.

In order to achieve the above object, a vibration test method (1) according to the present invention uses a vibration test apparatus having a vibration function in one direction, and each direction of the xyz axis of the device under test is the xyz axis of the vibration table. A test object is placed on a vibration table via a jig so as to be inclined at a predetermined angle with respect to each direction, and a vibration under a predetermined condition is applied to the one direction.

According to the vibration test method (1), using a vibration test apparatus having a vibration function in one direction,
The test object is placed on the vibration table via a jig so that each direction of the xyz axis of the test object is inclined by a predetermined angle with respect to each direction of the xyz axis of the vibration table, and the one direction The vibration test apparatus can be simultaneously excited in each direction of the xyz axis of the device under test by applying vibration under a predetermined condition, even if the vibration test apparatus has only a vibration function in one direction. Without changing the mounting direction of the test body, it is possible to vibrate simultaneously in each direction of the xyz axis of the test body by only a vibration test in one direction. Therefore, the test time when using the uniaxial vibration test apparatus can be shortened to about one third of the conventional time, that is, the same as when using the triaxial vibration test apparatus, without incurring equipment costs. Test efficiency can be increased.

In addition, the vibration test auxiliary device (1) according to the present invention includes a test object mounting jig to which a test object is mounted, and a mounting surface of the test object to which the test object mounting jig is mounted. A first mounting portion that is formed in a shape inclined with respect to the opposing surface and has a vibration function in one direction, and is mounted on the test object mounting jig. Xyz of the DUT
A second mounting portion for mounting the device under test mounting jig on the mounting surface such that each direction of the shaft is inclined at a predetermined angle with respect to each direction of the xyz axis of the shaking table. Acceleration adjustment for adjusting a vibration table mounting jig and acceleration applied to at least one of the xyz axes of the DUT attached to the vibration table mounting jig via the DUT mounting jig And acceleration adjustment control means for controlling the acceleration adjustment means so as to satisfy predetermined acceleration conditions for each direction of the xyz axis of the device under test.

According to the vibration test auxiliary device (1), the test subject mounting surface of the vibration table mounting jig is formed in a shape inclined with respect to the surface facing the mounting surface, and the vibration table of the vibration test device is provided. A state in which each direction of the xyz axis of the first mounting portion for mounting to the test object and the test object mounted on the test object mounting jig is inclined by a predetermined angle with respect to each direction of the xyz axis of the vibration table Since the vibration table mounting jig is provided with a second mounting portion for mounting the test object mounting jig on the mounting surface so that the mounting is performed on the test body mounting jig Each direction of the xyz axis of the device under test can be attached to the vibration table in a state where each direction is inclined at a predetermined angle with respect to each direction of the xyz axis of the vibration table. For this reason, even in a vibration test apparatus having only a vibration function in one direction, each of the xyz axes of the test object can be obtained only by a vibration test in one direction without changing the mounting direction of the test object. The direction can be simultaneously excited, and the test time when using a uniaxial vibration test device can be reduced to about one third of the conventional time, that is, the same as when using a triaxial vibration test device. By using a vibration test apparatus having only a vibration function in one axis direction, it is possible to greatly increase test efficiency without incurring much new equipment cost.

In addition, since the acceleration adjustment means controlled by the acceleration adjustment control means is provided, even if the acceleration conditions applied to each direction of the xyz axis of the device under test are different, the acceleration conditions are The acceleration applied to each direction of the xyz axis can be adjusted (attenuated or amplified) so as to satisfy, and a vibration test satisfying different acceleration conditions for each direction can be realized by a vibration test in one direction, A highly accurate vibration test can be performed.

Moreover, the vibration test system (1) according to the present invention can be installed with the vibration test auxiliary device (1), a vibration unit having a vibration function in one direction, and a vibration table mounting jig of the vibration test auxiliary device. And a vibration test apparatus having a vibration control means for controlling a vibration function of the vibration exciter.

According to the vibration test system (1), even a vibration test apparatus having only a vibration function in one direction can be used only in a vibration test in one direction without changing the mounting direction of the test object. It is possible to vibrate simultaneously in each direction of the xyz axis of the device under test. Therefore, the test time when using the uniaxial vibration test apparatus can be shortened to about one third of the conventional time, that is, the same as when using the triaxial vibration test apparatus, and only the vibration function in one direction can be achieved. By using the vibration testing apparatus equipped with the above, it is possible to construct a system that can greatly increase the test efficiency without incurring much new equipment cost.

Further, even when acceleration conditions applied to each direction of the xyz axis of the device under test are different, the acceleration applied to each direction of the xyz axis is adjusted (attenuated, so as to satisfy the acceleration condition).
Vibration test that satisfies different acceleration conditions in each direction can be realized by vibration test in one direction, and a system capable of performing a vibration test with high accuracy can be obtained.

Embodiments of a vibration test method, a vibration test auxiliary device, and a vibration test system according to the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram illustrating a main part of a vibration test system according to an embodiment. In this embodiment, the case where the in-vehicle audio device is the device under test 1 will be described, but the present invention can also be applied to other electronic devices.

The vibration test system includes a vibration exciter 11 having a vibration function in one direction, a vibration table 12 that vibrates in the horizontal direction by the vibration exciter 11, and a vibration control device 13 that controls driving of the vibration exciter 11. A vibration test apparatus 10, a vibration table mounting jig 20 fixed to the upper surface of the vibration table 12,
A DUT attachment jig 30 fixed to the upper surface of the vibration table attachment jig 20, and a DUT attachment jig 30
The acceleration adjusting devices 41A and 41B arranged in the above and the acceleration adjusting control device 40 for controlling the driving of the acceleration adjusting devices 41A and 41B. The vibration test apparatus 10 may be a general uniaxial vibration test apparatus capable of performing a sine wave vibration test (including a frequency sweep test) that applies a vibration due to a sine wave to the device under test 1.

The vibration control device 13 includes a microcomputer (not shown) including a CPU, a RAM, and a ROM, and drives the vibrator 11 based on a control program (software) stored in the ROM. The operation, that is, the vibration frequency, acceleration, amplitude and the like of the vibration table 12 connected to the vibrator 11 are controlled.

In addition, a personal computer (hereinafter referred to as a PC) 50 can be connected to the vibration control device 13, and various data and the like can be input to the vibration control device 13 via the PC 50, Various data detected by the control device 13 is monitored on the PC 50 (
(Not shown) can be displayed.

In addition, the arrow V in the figure indicates the excitation direction of the vibration table 12, and xyz in the figure indicates the xyz axis of the vibration table 12. Here, the vibration direction of the vibration table 12 vibrates. The direction of the table 12 is the x-axis direction, and the direction perpendicular to the x-axis direction in the horizontal plane is the y-axis direction of the table 12.
A direction perpendicular to the upper surface of the vibrating table 12 is a z-axis direction of the vibration table 12. Also, x'y'z 'in the figure is
The xyz axis of the device under test 1 is shown. Here, the front-rear direction of the device under test 1 is the x of the device under test 1.
The following description will be made on the assumption that the “axis direction”, the left-right direction of the DUT 1 is the y′-axis direction of the DUT 1, and the vertical direction of the DUT 1 is the z′-axis direction of the DUT 1.

Further, the vibration table 12 is provided with an acceleration sensor 54 that detects acceleration applied to the vibration table 12 in the x-axis (vibration) direction, and the acceleration sensor 54 is connected to the vibration control device 13.

FIG. 2 is a perspective view schematically showing a vibration table attachment jig 20 attached to the upper surface of the vibration table 12. In addition, the arrow V in the figure indicates the excitation direction of the vibration table 12.
The vibration table mounting jig 20 has an upper surface (surface to be tested) mounted at a predetermined angle (ε °) with respect to the bottom surface.
It is configured as a plate-shaped jig having a substantially rectangular shape in plan view formed in an inclined shape, and bolt mounting holes 2 for inserting bolts and fixing them to the upper surface of the vibration table 12 at positions near the upper four corners.
1 (first attachment portion) is formed.

A plurality of bolt mounting holes 22 (second mounting portions) for fixing the DUT 30 with bolts are formed on the upper surface at predetermined angular intervals on the circumference of a predetermined radius. Has been. With this bolt mounting hole 22, the mounting angle of the DUT 30 (angle formed in the horizontal plane between the x-axis direction of the vibration table 20 and the x′-axis direction of the DUT 1) is 0 ° to 45 ° (45 That is, the direction of the x′y′z ′ axis of the DUT 1 attached to the DUT attachment jig 30 is The DUT 30 can be attached so as to be inclined at a predetermined angle with respect to each direction of the xyz axis.

Further, the vibration table mounting jig 20 having different inclination angles (ε °) (for example, ε ° = 15 °, 30 °, 40 °, 45 °, etc.) may be prepared. In this embodiment,
Although the case where the bolt mounting holes 21 and 22 for fixing with bolts are employed as the first and second mounting portions has been described, in other embodiments, a configuration in which fixing is performed by other fixing members other than bolts is also possible. Can be applied.

FIG. 3 is a perspective view schematically showing the DUT attachment jig 30 attached to the upper surface (the DUT mounting surface) of the vibration table attachment jig 20. A body attachment jig 30 includes a main body 31 formed in a generally U shape when viewed from the front, and L-shaped fixing members 35A and 35B for fixing the DUT 1 to the main body 31. It is comprised including.

The main body 31 includes a substantially rectangular plate-like lower plate portion 32 and a lower plate portion 32.
A side wall portion 33 erected from a predetermined position on the upper surface (position closer to one side surface) and an upper plate portion 34 extending in the horizontal direction from the upper portion of the side wall portion 33 are integrally formed, and the lower plate portion The device under test 1 is disposed between the upper plate portion 34 and the upper plate portion 34, and fixing members 35A and 35B are provided.
The device under test 1 is fixed to the lower plate portion 32 via the.

Bolt mounting holes 36 for fixing to the vibration table mounting jig 20 with bolts are formed at positions near the four corners of the lower plate portion 32, and fixing members 35A are formed at predetermined positions on the lower plate portion 32.
, 35B are formed with bolt mounting holes 37 for fixing with bolts. Further, the fixing members 35A and 35B have bolt mounting holes 38 for fixing to the lower plate portion 32 with bolts.
And a bolt mounting hole 39 for fixing the device under test with a bolt.

An acceleration adjusting device 41A is disposed on the side wall 33 of the main body 31, and an acceleration adjusting device 41B is disposed on the upper plate portion 34. The acceleration adjusting devices 41 </ b> A and 41 </ b> B include the side wall portion 33.
And a buffer member 42 made of rubber, a spring member, or the like provided on the inner surface of the upper plate portion 34, and an acceleration attenuation mechanism 43 that attenuates the acceleration of the DUT 1 acting on the buffer member 42. Has been. As the acceleration attenuation mechanism 43, for example, a mechanism that can control the movement of a piston or the like by hydraulic pressure (or air pressure) or the like and adjust the damping force by the buffer member 42 can be adopted. The operation is controlled based on a control signal from the acceleration adjustment control device 40. Note that an acceleration amplification mechanism (for example, a small vibration mechanism) for increasing the acceleration of the device under test 1 acting on the buffer member 42 may be further provided.

In addition, acceleration sensors 51, 52, and 53 are installed at predetermined positions of the DUT 1 or the main body 31 in order to detect acceleration applied to each direction of the X'y'z 'axis of the DUT 1. It has become. In addition, the arrow described in the acceleration sensors 51, 52, and 53 indicates the acceleration detection direction.

The acceleration adjustment control device 40 includes a microcomputer (not shown) including a CPU, a RAM, and a ROM. Based on a control program (software) stored in the ROM, the acceleration adjustment control devices 41A and 41B ( The operation of the acceleration damping mechanism 43 is controlled.

The acceleration adjustment control device 40 can be connected to a personal computer (PC) 50, and various data and the like are input to the acceleration adjustment control device 40 via the PC 50, and the acceleration adjustment control device. Various data detected at 40 can be displayed on a monitor (not shown) of the PC 50.

Further, the vibration control device 13 and the acceleration adjustment control device 40 are connected so as to be able to perform data communication, and can exchange various data necessary for control (vibration frequency control status, etc.). .

Next, a vibration test method using the vibration test system according to the embodiment will be described. First, before conducting a vibration test, a preliminary experiment for determining test conditions is performed. In the preliminary experiment, a test condition for performing a vibration test satisfying a vibration test condition required for evaluating the durability of the DUT 1 in one vibration test in one direction is determined.

Before conducting the preliminary experiment, the vibration test conditions required for evaluating the durability of the DUT 1, the vibration table mounting jig 20, the DUT attachment jig 30, and the DUT 1 are prepared. FIG. 4 is a table for explaining an outline of vibration test conditions required for evaluating the durability of the DUT.

The vibration test condition table of FIG. 4 includes a range of vibration frequencies required for durability evaluation of the DUT 1 and each direction of the x′y′z ′ axis of the DUT 1 in the vibration frequency range. The relationship with the acceleration applied to is shown. In this case, the range of vibration frequencies to be swept is ab,
It is divided into three ranges of b to c and c to d (Hz), and for each range of vibration frequency,
The required values of acceleration (m / s ² ) applied in the x′-axis (front / rear) direction, y′-axis (left / right) direction, and z′-axis (up / down) direction of the device under test are respectively defined. Usually, the required value of acceleration applied to each direction of the DUT differs depending on the range of the vibration frequency, and the required value of acceleration in each direction of the vibration frequency and the direction depends on the type of the DUT 1 and the usage environment. It is set in consideration of the durability performance required for the device under test 1. Here, the description will be made assuming that the required acceleration value applied to the DUT in the x′-axis (front-rear) direction is larger than the required acceleration value applied in the y′-axis (left-right) direction and z′-axis (vertical) direction. .

Next, the vibration table mounting jig 20 is fixed to the upper surface of the vibration table 12 with bolts in the direction shown in FIG. Then, the DUT 1 is fixed to the DUT mounting jig 30 with bolts, and the DUT 30 having the DUT 1 fixed thereto is bolted to the upper surface (inclined surface) of the vibration table mounting jig 20. Secure with.
At this time, the angle formed by the horizontal plane between the x′-axis (front-rear) direction of the DUT 1 and the x-axis (vibration) direction of the vibration table 12 is first fixed so as to be the first mounting angle. . In the preliminary experiment, the following acceleration measurement experiments are sequentially performed at first to nth mounting angles (for example, angles set to 15 °, 30 °, 40 °, 45 °, etc.).

Next, the acceleration in each direction of the x′y′z ′ axis of the device under test 1 fixed in a state of being tilted to the vibration table 12 via the vibration table mounting jig 20 and the device under test mounting jig 30 can be detected. As described above, the acceleration sensors 51, 52, and 53 are installed at predetermined positions of the DUT 30 and the DUT 1, respectively, and the acceleration so that the acceleration in the X-axis (vibration) direction of the vibration table 12 can be detected. Sensor 5
4 is installed on the vibration table 12. The acceleration sensor 54 is connected to the vibration control device 13,
The acceleration sensors 51, 52, 53 are connected to the acceleration adjustment control device 40.

Next, based on the vibration frequency specified in the vibration test condition table shown in FIG.
2 is started, and the detected value of the acceleration (acceleration sensor 51) in the x′-axis direction of the DUT 1 at the first mounting angle is the acceleration request value (vibration frequency) defined in the vibration test condition table. The operation of the shaking table 12 by the vibrator 11 is controlled so that A1 (m / s ² ) in a to b (Hz), A2 in b to c (Hz), and A3 in c to d (Hz). The detected value of the acceleration (acceleration sensors 52 and 53) applied in each direction of the y′z ′ axis of the DUT 1 at that time, and the detection of the acceleration (acceleration sensor 54) applied in the x-axis (vibration) direction of the vibration table 12 Record the value.

When the recording of the acceleration detection value at the first mounting angle is completed, the mounting position of the test object mounting jig 30 is changed so as to be the second mounting angle, and the acceleration detection value is the same as described above. Record
The same test is repeated until the detected acceleration value at the nth mounting angle is recorded.

Thereafter, the detected value data of the acceleration in the y′z′-axis direction of the DUT 1 at the first to nth mounting angles (average value data when performed multiple times) and the DUT in the vibration test condition table 1 y'z
Compare the required acceleration value in the "axis direction" and determine the mounting angle condition that minimizes the difference between the y'z 'axial direction acceleration value of the DUT 1 and the detected acceleration data. 1 mounting angle conditions (conditions for mounting the DUT 30 and the vibration table mounting jig 20 to the vibration table 12) are determined.

If there is a shaking table mounting jig 20 with a different inclination angle, the shaking table mounting jig 20 is further replaced, and the same experiment as described above is repeated, and the y'z 'axis direction of the DUT 1 is measured. A mounting angle condition that minimizes the difference between the acceleration request value and the acceleration detection value data may be determined.

Next, a vibration test performed after the preliminary experiment will be described. In the vibration test, first, the vibration table mounting jig 2 is attached to the vibration table 12 so as to satisfy the mounting angle condition of the DUT 1 determined in the preliminary experiment.
0, a DUT 30 to which the DUT 1 is fixed is attached to the vibration table Attaching jig 20, and each direction of the x'y'z 'axis of the DUT 1 is the xyz of the vibration table 12. The device under test 1 is installed on the vibration table 12 via jigs (vibration table mounting jig 20 and device under test mounting jig 30) so as to be inclined at a predetermined angle with respect to each direction of the shaft. .

Further, the acceleration adjustment control device 40 includes the vibration table 1 under the determined mounting angle condition of the device under test 1.
2, the detected value data of acceleration in each direction of the x′y′z ′ axis of the device under test 1, and vibration test condition table data (vibration frequency of the vibration table 12, x ′ of the device under test 1) Data necessary for acceleration adjustment, such as y′z′-axis direction acceleration demand value), is input in advance. On the other hand, the vibration control device 13 includes x of the vibration table 12 when it is vibrated under the determined mounting angle condition of the DUT 1.
Detection value of acceleration in the axial direction (this value is used as a control value), data of vibration test condition table (vibration frequency of vibration table 12, acceleration request in each direction of x'y'z 'axis of DUT 1 value)
Input data necessary for vibration control.

After the vibration test is ready, the vibration test is started by turning on the power of the vibrator 11, the vibration control device 13, and the acceleration adjustment control device 40. In the vibration test, the frequency is changed (sweep) at a constant change rate between the vibration frequencies specified in the vibration test condition table, and the sweep test is repeated in a predetermined time period for a predetermined number of times. In the horizontal direction).

Next, the processing operation performed by the vibration control device 13 in the vibration test system according to the embodiment will be described based on the flowchart shown in FIG. This processing operation is executed after the vibration test is started.

First, in step S1, reading of excitation conditions, that is, information on the control range of the vibration frequency, the sweep time, and the control value of the acceleration in the x-axis direction of the shaking table 12, is read. In the next step S2, the excitation conditions are read. Based on the above, control is performed to drive the vibrator 11 to start the vibration of the shaking table 12 in the horizontal direction, and then the process proceeds to step S3.

In step S3, the detected value of the acceleration in the x-axis direction of the vibration table 12 is taken from the acceleration sensor 54, and in the subsequent step S4, the difference between the detected value of the acceleration in the x-axis direction of the vibration table 12 and the control value is reduced. Then, the vibration control of the shaking table 12 is performed, and then the process proceeds to step S5.

In step S5, based on the count value of the sweep time, it is determined whether or not the switching timing of the vibration frequency range has been reached. If it is determined that the switching timing of the vibration frequency range has been reached, the process returns to step S1 and the next excitation is performed. The conditions are read and the process is repeated. On the other hand, if it is determined that it is not the switching timing of the vibration frequency range, the process proceeds to step S6.

In step S6, it is determined whether or not the vibration test in all the specified vibration frequency ranges is completed. If it is determined that the vibration test is not yet completed, the process returns to step S3 and repeats the process. Proceeding to step S7, a process for stopping the drive of the vibrator 11 is performed, and then the process is terminated.

Next, the processing operation performed by the acceleration adjustment control device 40 in the vibration test system according to the embodiment will be described based on the flowchart shown in FIG. This processing operation is executed after the vibration test is started.

First, in step S11, information related to the excitation condition currently controlled is acquired from the vibration control device 13, and in the next step S12, y′z ′ of the DUT 1 corresponding to the currently controlled vibration frequency range. The acceleration request value in the axial direction is read out and set to the control value (adjustment target value) of the acceleration of the DUT 1 in the y′z ′ axis direction, and then the process proceeds to step S13.

In step S13, detected acceleration values in the x'y'z 'axis directions of the DUT 1 are acquired from the acceleration sensors 51, 52, 53. In the next step S14, the y'z' axis of the DUT 1 is acquired. Based on the difference between the detected value of the acceleration in each direction and the control value, the acceleration adjustment (attenuation) amount in each direction of the y′z ′ axis is obtained, and then the process proceeds to step S15.

In step S15, the acceleration adjustment devices 41A and 41B are controlled based on the obtained acceleration adjustment amount in each direction of the y′z ′ axis, and the acceleration in each direction of the y′z ′ axis of the DUT 1 is controlled. A process of attenuating so as to approach the value is performed, and then the process proceeds to step S16. In the acceleration adjustment devices 41A and 41B, the acceleration adjustment mechanism 43 is driven so as to attenuate the acceleration in each direction of the y′z ′ axis of the device under test 1 in response to the control signal from the acceleration adjustment control device 40. It has come to be.

In step S16, it is determined whether or not information related to the next excitation condition has been acquired from the vibration control device 13. If it is determined that information related to the next excitation condition has been acquired, step S12 is performed.
Return to and repeat the process.

On the other hand, if it is determined in step S16 that the information regarding the next excitation condition has not been acquired, the process proceeds to step S17, where it is determined whether or not the vibration test in all the specified vibration frequency ranges has been completed. If not, the process returns to step S13 and repeats the process. If it is determined that the process has been completed, the process ends.

According to the vibration test system according to the above embodiment, the upper surface (surface to be tested) of the vibration table mounting jig 20 is formed in a shape inclined with respect to the bottom surface (surface opposite to the mounting surface), and vibration Each direction of the bolt mounting hole 21 for mounting on the vibration table 12 of the test apparatus 10 and the x′y′z ′ axis of the device under test 1 mounted on the device under test mounting jig 30 is the xyz axis of the vibration table 12. The vibration table mounting jig 20 is provided with bolt mounting holes 22 for mounting the DUT 30 on the upper surface so as to be inclined at a predetermined angle with respect to the respective directions. The vibrating table 12 is in a state where each direction of the x′y′z ′ axis of the device under test 1 attached to the test piece mounting jig 30 is inclined at a predetermined angle with respect to each direction of the xyz axis of the vibrating table 12. Can be attached to.

For this reason, even if it is the vibration test apparatus 10 provided only with the vibration function to one direction, to-be-tested object 1
Without changing the mounting direction of the vibrator or the direction of vibration of the vibrator 11, it is possible to vibrate simultaneously in each direction of the x′y′z ′ axis of the DUT 1 only by a vibration test in one direction. The test time when the uniaxial vibration test apparatus 10 is used can be shortened to about one third of the conventional case, that is, the same as when the triaxial vibration test apparatus is used, and only the vibration function in one direction is provided. By using the vibration test apparatus 10 provided, it is possible to construct a system that can greatly increase the test efficiency without incurring much new equipment cost.

Further, even if the acceleration condition applied to each direction of the x′y′z ′ axis of the DUT 1 is different, it is added to each direction of the x′y′z ′ axis so as to satisfy the acceleration condition. Acceleration can be adjusted (attenuated or amplified), and vibration tests that satisfy different acceleration conditions in each direction can be realized by vibration tests in only one direction, and highly accurate vibration tests can be performed. It can be a system that can.
The configuration of the vibration test system can be applied not only to the vibration test of the DUT 1 but also to a drop impact test.

1 is a schematic configuration diagram of a vibration test system according to an embodiment of the present invention. It is the perspective view which showed typically the vibration stand attachment jig used with the vibration test system which concerns on embodiment. It is the perspective view which showed typically the to-be-tested object mounting jig used with the vibration test system which concerns on embodiment. It is a table for demonstrating the vibration test conditions of the to-be-tested body performed with the vibration test system which concerns on embodiment. It is the flowchart which showed the processing operation which the vibration control apparatus in the vibration test system which concerns on embodiment performs. It is the flowchart which showed the processing operation which the acceleration adjustment control apparatus in the vibration test system which concerns on embodiment performs.

Explanation of symbols

1 DUT
DESCRIPTION OF SYMBOLS 10 Vibration test apparatus 11 Exciter 12 Shaking table 13 Vibration control apparatus 20 Vibration table mounting jig 30 Test object mounting jig 40 Acceleration adjustment control apparatus 41A, 41B Acceleration adjustment apparatus

Claims (4)

Using a vibration testing device with a vibration function in one direction,
The test object is placed on the vibration table via a jig so that each direction of the xyz axis of the test object is inclined by a predetermined angle with respect to each direction of the xyz axis of the vibration table,
A vibration test method comprising applying a predetermined condition of vibration to the one direction. The acceleration of at least one of the xyz axes of the device under test is adjusted at the time of vibration so as to satisfy a predetermined acceleration condition for each direction of the xyz axis of the device under test. The vibration test method according to 1. A DUT mounting jig to which the DUT is attached;
A vibration table of a vibration test apparatus having a mounting surface of a test object to which the test object mounting jig is mounted formed in a shape inclined with respect to a surface facing the mounting surface and having a vibration function in one direction A state in which each direction of the xyz axis of the first mounting portion for mounting to the test object and the test object mounted on the test object mounting jig is inclined by a predetermined angle with respect to each direction of the xyz axis of the vibration table A vibration table mounting jig having a second mounting portion for mounting the DUT mounting jig to the mounting surface so that
Xy of the DUT attached to the shaking table attachment jig via the DUT attachment jig
acceleration adjusting means for adjusting acceleration applied in at least one of the z-axis directions;
A vibration test auxiliary device comprising: an acceleration adjustment control means for controlling the acceleration adjustment means so as to satisfy a predetermined acceleration condition for each direction of the xyz axis of the device under test. A vibration test auxiliary device according to claim 3,
A vibration unit having a vibration function in one direction, a vibration table on which a vibration table mounting jig of the vibration test auxiliary device can be installed, and a vibration test apparatus having a vibration control means for controlling the vibration function of the vibration unit; A vibration test system comprising:

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