KR101510184B1 - Impact tester of car-door and computer-readable recording medium having impact testing program - Google Patents
Impact tester of car-door and computer-readable recording medium having impact testing program Download PDFInfo
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- KR101510184B1 KR101510184B1 KR20140002590A KR20140002590A KR101510184B1 KR 101510184 B1 KR101510184 B1 KR 101510184B1 KR 20140002590 A KR20140002590 A KR 20140002590A KR 20140002590 A KR20140002590 A KR 20140002590A KR 101510184 B1 KR101510184 B1 KR 101510184B1
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- impactor
- clamp
- electric signal
- impact force
- impact
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- 238000012360 testing method Methods 0.000 claims abstract description 42
- 230000001133 acceleration Effects 0.000 claims description 47
- 238000004088 simulation Methods 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 8
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 230000007547 defect Effects 0.000 claims description 2
- 230000002950 deficient Effects 0.000 claims description 2
- 230000003584 silencer Effects 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 description 13
- 239000010959 steel Substances 0.000 description 13
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 9
- 229910052782 aluminium Inorganic materials 0.000 description 9
- 239000002131 composite material Substances 0.000 description 9
- 238000003780 insertion Methods 0.000 description 8
- 230000037431 insertion Effects 0.000 description 8
- 230000002265 prevention Effects 0.000 description 5
- 238000000926 separation method Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
- G01M17/0078—Shock-testing of vehicles
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/08—Shock-testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
- G01N3/303—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight generated only by free-falling weight
-
- G01N2033/0083—
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0244—Tests performed "in situ" or after "in situ" use
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- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The present invention relates to a computer-readable recording medium in which a collision tester and a collision test control program are stored. More specifically, it is possible to perform a local collision test of a vehicle side door by freely dropping an impactor and to confirm test results at a glance A collision tester and a collision tester control program capable of displaying the collision tester control program and the collision tester control program.
Description
The present invention relates to a computer-readable recording medium in which a collision tester and a collision test control program are stored. More specifically, it is possible to perform a local collision test of a vehicle side door by freely dropping an impactor and to confirm test results at a glance A collision tester and a collision tester control program capable of displaying the collision tester control program and the collision tester control program.
In general, a collision tester of a vehicle is an experimental device for ensuring the safety of a passenger in the event of a vehicle collision, and a pile of a human shape is carried on the actual vehicle.
In addition, the collision test of the vehicle must be performed variously in the front, rear, side, and upper direction.
In order to solve these problems, a simulated crash tester has been developed. Korean Patent Laid-Open Publication No. 2009-0051570 (a vehicle simulated crash test apparatus) can change the speed of a simulated vehicle to perform a crash test, There is a disadvantage in that it can be performed only.
Korean Patent Laid-Open Publication No. 2006-0067640 (a simulated crash-tester of a vehicle) discloses a test apparatus capable of adjusting a collision angle at the time of a vehicle collision using a simulated vehicle and a plate under the simulated vehicle. However, There is a limitation that only the forward mock collision test can be performed.
Also, since the above-described techniques are not a crash test of an actual vehicle but a crash test of a simulated vehicle, there is a problem that they can be different from the crash test result of an actual vehicle.
The object of the present invention is to provide a computer-readable recording medium having a crash tester and a crash test control program capable of performing a local crash test of an actual vehicle door will be.
It is another object of the present invention to provide a collision tester capable of simultaneously testing impact force, deformation amount, and acceleration (vibration) of a vehicle door and outputting test results at a glance, And a recording medium.
The objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.
In order to achieve the above object, the present invention provides a winch crane capable of lifting a heavy object through a wire; An impactor clam connected to the wire and moving up and down; And an impactor detachably coupled to the impactor clamp and outputting an electric signal that falls freely in the impactor clamp and collides with a local portion of the inspected object to change an impact force.
In a preferred embodiment, the impactor comprises: a lower cover having an upper surface and a lower surface at a central portion thereof penetrating each other and having a hollow therein; A load cell cylinder inserted into the hollow interior of the lower cover, the lower end protruding from the lower surface of the lower cover and being thrown upward when collided with the subject; An upper cover which is defective to the lower cover and has a groove formed at a central portion thereof so that the load cell cylinder can bounce up; A load cell attached to an inner surface of the groove of the upper cover and outputting an electric signal according to a degree of impact when the load cell silencer hits and collides with the load cell; And a load cell plate for attaching the load cell to the inner surface of the groove of the upper cover.
According to a preferred embodiment of the present invention, the impact clamp includes a cover insert groove into which a top end of the upper cover can be inserted, a rod defect groove penetrating toward the cover insertion groove at a predetermined side portion thereof, And an actuator having a rod that can linearly move by hydraulic or pneumatic pressure, wherein the actuator is attached to a side surface of the clamp body, and is attached to a position where the rod can move forward or backward into the rod engagement groove A load engaging groove is formed in a predetermined upper portion of the upper cover so that the upper cover is coupled to the clamp body by being hooked on the advanced rod when the upper end of the upper cover is inserted into the cover insertion groove, The impactor is detached from the impactor clamp and drops freely when the rod is reversed.
In a preferred embodiment, the apparatus further comprises a clamping jig for connecting the wire and the impactor clamp to each other.
In a preferred embodiment, the apparatus further comprises a body fixing frame for fixing the subject to the floor, the body fixing frame comprising: a lower frame placed on the lower floor of the impactor; a plurality A frame including a column frame and an upper frame interconnecting the upper portions of the column frame; A body fixing jig connected to the lower frame and capable of fixing the body to be inspected; And an impactor separation prevention wire that connects the frame and the impactor to each other and prevents the impactor from bouncing to the outside of the frame after colliding with the inspected object.
In a preferred embodiment, the first acceleration sensor is attached to a certain portion of the impactor clamp and senses the acceleration when the impactor is separated from the impactor clamp and outputs an electric signal. And a second acceleration sensor attached to a certain portion of the fixture frame for sensing an acceleration when the impactor impacts the subject and outputting an electric signal.
In a preferred embodiment, the apparatus further includes a strain gauge attached to the subject to output an electrical signal according to a degree of deformation of the subject.
In a preferred embodiment, the operation of the winch crane and the actuator is controlled by connecting the winch crane, the actuator, the impactor, the acceleration sensors, and the strain gauge to control an operation of the winch crane and the actuator, and a controller for converting the electric signal inputted from the strain gauge into a deformation amount or displaying the input time of the electric signal input from the acceleration sensors by time zone.
The collision tester control program may cause the controller to operate the winch crane so that the collision tester can be operated in accordance with the collision tester control program. Winch crane control means for controlling the height of the impactor; An impactor position display means for simulating the height of the impactor and outputting it to a screen; An impact force display means for receiving an electric signal from the impactor and converting the impact into an impact force, and displaying the magnitude of the electric signal input from the impactor or the impact force; And strain amount display means for receiving an electrical signal from the strain gauges and converting the strain into an amount of strain and displaying a magnitude of the electrical signal inputted from the strain gages or a converted strain amount. And further provides a computer-readable recording medium on which the collision test control program is stored.
In a preferred embodiment, the collision tester control program comprises: input signal simulation means for simulating an electric signal input from the impactor, the strain gauge or the acceleration sensors over time and displaying the waveform as a waveform; An impact force simulation means for simulating the impact force converted by the impact force display means according to the passage of time and displaying the impact force waveform as an impact force waveform; Deformation amount simulation means for simulating the deformation amount converted by the deformation amount display means over time and displaying the deformation amount waveform in a deformation amount waveform; And acceleration simulation means for simulating a signal inputted from the acceleration sensor according to the passage of time and displaying the acceleration waveform as an acceleration waveform.
The present invention has the following excellent effects.
First, according to the computer-readable recording medium in which the collision tester and the collision test control program of the present invention are stored, a local collision test of an actual vehicle door can be performed. Therefore, the collision test can be performed at a very low cost There is an effect that a collision test can be performed.
Further, according to the computer-readable recording medium in which the collision tester and the collision test control program of the present invention are stored, it is possible to perform position control and drop control of the impactor through a simple operation, simultaneously measure impact force, deformation amount and acceleration of the vehicle door It can be displayed on the screen, so you can see the test results at a glance.
1 is a view showing a collision tester according to an embodiment of the present invention;
2 is a front view of an impactor of a collision tester according to an embodiment of the present invention;
3 is a side view of an impactor of a crash tester according to an embodiment of the present invention,
4 is an impactor top view of the impact tester according to one embodiment of the present invention,
5 is an impactor top view of a crash tester according to an embodiment of the present invention,
FIG. 6 is an exploded view of an impactor of a collision tester according to an embodiment of the present invention,
FIG. 7 is a diagram showing the function of the collision test control program according to an embodiment of the present invention;
8 to 9 are photographs of a collision tester installation according to an embodiment of the present invention,
FIG. 10 is a graph showing a simulation result of a load cell output signal of a collision tester according to an embodiment of the present invention,
11 is a graph showing waveforms of a load cell output signal of an impact tester according to an embodiment of the present invention,
12 is a view for explaining an attachment position of a strain gauge of a collision tester according to an embodiment of the present invention,
13 to 15 are waveforms simulating an output signal of a strain gauge of a collision tester according to an embodiment of the present invention,
16 to 18 are waveforms simulating the output signal of the strain gauge of the collision tester according to an embodiment of the present invention as a deformation amount,
19 to 21 are waveforms simulating the output signal of the acceleration sensor of the collision tester according to an embodiment of the present invention.
Although the terms used in the present invention have been selected as general terms that are widely used at present, there are some terms selected arbitrarily by the applicant in a specific case. In this case, the meaning described or used in the detailed description part of the invention The meaning must be grasped.
Hereinafter, the technical structure of the present invention will be described in detail with reference to preferred embodiments shown in the accompanying drawings.
However, the present invention is not limited to the embodiments described herein but may be embodied in other forms. Like reference numerals designate like elements throughout the specification.
Referring to FIG. 1, a
In addition, the
Further, the
The
Although not shown, a crane support (not shown) may be provided at the upper end of the
The
The
In addition, the
A more detailed description will be given in the description of Figs. 2 to 6.
The
The
For example, the
In addition, the
The impactor
In addition, the impactor
Hereinafter, the configurations of the
2 to 6, the
The
A load
The
When the
In addition, the
The
The
The
The
The
In addition, the
The
The
That is, the
In the present invention, the
In other words, the
The
That is, the
The
That is, the
In addition, the present invention may include a first acceleration sensor attached to a certain portion of the
In addition, the first acceleration sensor and the second acceleration sensor can measure the acceleration in the X, Y, and Z axis directions and measure the separation time of the
That is, the acceleration sensors can measure the time taken for the
In addition, the present invention may further include a strain gauge attached to a certain portion of the
The present invention further includes a
The controller may control the operation of the
Also, the controller may be a personal computer, a combination of hardware specially designed for the present invention, or a mobile smart device such as a smart phone or a tablet PC.
In addition, the controller is operated by the collision test control program of the present invention.
Also, the collision test control program may be embedded in the controller to function the controller, and may be stored in a storage device such as an HDD, a CD, a USB storage, an SD card, etc. and read by the controller to function the controller have.
In addition, the crash test control program may be provided to the controller in a form of being downloaded from a server system storing the crash test control program.
For example, the server system may include a storage for storing the collision test control program, a data transmission / reception device capable of transmitting / receiving data through a communication network, and a central processing unit capable of transmitting the collision test control program through the data transmission / .
Referring to FIG. 7, the collision
The crane control means 210 controls the height of the impactor by operating the
The impact position display means 220 simulates how far the
The impact force display means 230 receives an electrical signal from the
However, the impact force display means 230 may display the electric signal input from the
The
However, the deformation amount display means 240 may display an electric signal inputted from the strain gages in units of voltage or current.
Also, the input
In addition, the input
In addition, the impact
Also, the deformation
In addition, the
Therefore, the user can check at a glance the change in the impact force, the change in the amount of deformation, and the collision time with the passage of time.
8 to 9 are photographs in which a collision tester is installed for an experiment according to an embodiment of the present invention. The height of a drop of the
A load cell having a rated capacity of 2,000 [kg], a rated output of 2.0 [mV / V] and a resistance between input and output of 700 ± 10 [Ohms] was used as the
10 is a graph simulating electric signals outputted from the
11 shows that the electric signal output from the
Therefore, it can be seen that the aluminum profile beam door has improved strength characteristics by 23.4% compared with the steel beam door, and the composite beam door has a 34.8% strength characteristic as compared with the steel beam door.
12 is a view for explaining attachment positions of strain gauges attached to the
In addition, the outer side of the
13 to 15 show the electric signals of the strain gauge measured at four points S1, S2, S3 and S4 on the inner side of the
As shown in Table 1, the output of the strain gauge was the minimum value of the steel beam door, and the aluminum profile beam door was the maximum value of the intermediate value composite beam door.
The composite energy beam door and the aluminum profile beam door are absorbed by the impact force and the deformation energy is large. In the steel beam door, the impact energy is relatively small and the deformation energy is small .
Fig. 16 is a result of strain measurement of the outer two points (a, b) in the steel beam door, Fig. 17 is the strain measurement result of the outer two points (a, b) in the composite beam door, (A, b) in the profile beam door (the result of converting the electrical signal of the strain gauge into a deformation amount).
As can be seen from Figs. 16 to 18, it was confirmed that the strain rate was sequentially increased from the steel beam door to the aluminum profile beam door and the composite beam door.
19 is a result of simulating the output of the second acceleration sensor when the
Acc_x is acceleration in the x axis, Acc_y is acceleration in the y axis, Acc_z is acceleration in the z axis, and Acc_i is acceleration vector sum in the xyz axis.
As can be seen from FIGS. 19 to 21, it is possible to accurately analyze the time of collision with the inspected
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, Various changes and modifications will be possible.
100: Collision Tester 110: Winch Crane
111: Wire 120: Impactor clamp
121: Clamp body 122: Actuator
130: Impactor 131: Lower cover
132: load cell cylinder 133: upper cover
134: load cell 135: load cell plate
140: object fixed frame 141: frame
142: object fixing jig 143: impactor separation prevention wire
150: Clamp fixing jig
Claims (10)
An impactor clam connected to the wire and moving up and down; And
And an impactor which is detachably coupled to the impactor clamp and drops an impact from the impactor clamp and collides with a local portion of the inspected object to output an electric signal that changes according to an impact force,
The impactor:
A lower cover having an upper surface and a lower surface at a central portion thereof penetrating each other and having a hollow therein;
A load cell cylinder inserted into the hollow interior of the lower cover, the lower end protruding from the lower surface of the lower cover and being thrown upward when collided with the subject;
An upper cover which is defective to the lower cover and has a groove formed at a central portion thereof so that the load cell cylinder can bounce up;
A load cell attached to an inner surface of the groove of the upper cover and outputting an electric signal according to a degree of impact when the load cell silencer hits and collides with the load cell; And
And a load cell plate for attaching the load cell to an inner surface of the groove of the upper cover.
The impact clamp
A cover inserting groove into which the upper end of the upper cover can be inserted is formed at a lower surface, a rod defect groove penetrating toward the cover inserting groove is formed at a side surface of the clamp body, And
And an actuator having a rod that can linearly move by hydraulic pressure or pneumatic pressure,
Wherein the actuator is attached to a side surface of the clamp body, the rod being attached to a position where the rod can advance or retract into the rod engagement groove,
A load engaging groove is formed at a predetermined upper end portion of the upper cover so as to be engaged with the advancing rod when the upper end of the upper cover is inserted into the cover inserting groove to couple the upper cover to the clamp body,
Wherein the impactor is detached from the impactor clamp and falls freely when the load is reversed.
Further comprising a clamp fixture (jig) for connecting the wire and the impactor clamp to each other.
Further comprising a body fixing frame for fixing the subject to the floor,
The subject fixed frame:
A frame including a lower frame placed on a lower floor of the impactor, a plurality of column frames erected on the lower frame, and an upper frame interconnecting the upper portions of the column frames;
A body fixing jig connected to the lower frame and capable of fixing the body to be inspected; And
And an impactor departure preventing wire that connects the frame and the impactor to each other and prevents the impactor from being blown out of the frame after colliding with the inspected object.
A first acceleration sensor attached to a certain portion of the impactor clamp and sensing an acceleration when the impactor is separated from the impactor clamp and outputting an electric signal; And
Further comprising a second acceleration sensor attached to a certain portion of the fixture frame for sensing an acceleration when the impactor impacts the subject and outputting an electric signal.
Further comprising a strain gauge attached to the subject to output an electrical signal according to a degree of deformation of the subject.
And controlling the operation of the winch crane and the actuator, or converting an electric signal inputted from the impactor into an impact force, connected to the winch crane, the actuator, the impactor, the acceleration sensors and the strain gauge, Further comprising a controller for displaying an electric signal input from the strain gauge in terms of a deformation amount or displaying the input time of the electric signal inputted from the acceleration sensors by time zone.
Wherein the collision tester control program comprises:
A winch crane control means for controlling the height of the impactor by operating the winch crane;
An impactor position display means for simulating the height of the impactor and outputting it to a screen;
An impact force display means for receiving an electric signal from the impactor and converting the impact into an impact force, and displaying the magnitude of the electric signal input from the impactor or the impact force; And
And strain amount display means for receiving an electrical signal from the strain gauges and converting the strain into an amount of strain and displaying a magnitude of the electrical signal inputted from the strain gages or a converted strain amount, A computer-readable recording medium on which a test control program is stored.
Wherein the collision tester control program comprises:
An input signal simulation means for simulating an electric signal inputted from the impactor, the strain gauge or the acceleration sensors according to the passage of time, and displaying the electric signal as a waveform;
An impact force simulation means for simulating the impact force converted by the impact force display means according to the passage of time and displaying the impact force waveform as an impact force waveform;
Deformation amount simulation means for simulating the deformation amount converted by the deformation amount display means over time and displaying the deformation amount waveform in a deformation amount waveform; And
Wherein the collision test control program further comprises: acceleration simulation means for simulating a signal inputted from the acceleration sensor according to the passage of time and displaying the acceleration waveform as an acceleration waveform; .
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KR20140002590A KR101510184B1 (en) | 2014-01-08 | 2014-01-08 | Impact tester of car-door and computer-readable recording medium having impact testing program |
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KR20140002590A KR101510184B1 (en) | 2014-01-08 | 2014-01-08 | Impact tester of car-door and computer-readable recording medium having impact testing program |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108507745A (en) * | 2018-04-04 | 2018-09-07 | 扬州市晨辉机械有限公司 | A kind of drop test device and its working method |
CN111044245A (en) * | 2019-11-29 | 2020-04-21 | 东风延锋汽车饰件系统有限公司 | Side collision verification device for broken parts of automobile door interior trim panel |
KR20210137822A (en) * | 2020-05-11 | 2021-11-18 | 국방과학연구소 | Three-stage hydraulic speed generator operating in dual mode for shock test and driving method thereof |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10151003A (en) * | 1996-11-22 | 1998-06-09 | Midori Anzen Co Ltd | Device and method for testing impact for shoes |
-
2014
- 2014-01-08 KR KR20140002590A patent/KR101510184B1/en active IP Right Grant
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10151003A (en) * | 1996-11-22 | 1998-06-09 | Midori Anzen Co Ltd | Device and method for testing impact for shoes |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108507745A (en) * | 2018-04-04 | 2018-09-07 | 扬州市晨辉机械有限公司 | A kind of drop test device and its working method |
CN108507745B (en) * | 2018-04-04 | 2024-01-19 | 扬州市晨辉机械有限公司 | Drop test device and working method thereof |
CN111044245A (en) * | 2019-11-29 | 2020-04-21 | 东风延锋汽车饰件系统有限公司 | Side collision verification device for broken parts of automobile door interior trim panel |
KR20210137822A (en) * | 2020-05-11 | 2021-11-18 | 국방과학연구소 | Three-stage hydraulic speed generator operating in dual mode for shock test and driving method thereof |
KR102334229B1 (en) | 2020-05-11 | 2021-12-03 | 국방과학연구소 | Three-stage hydraulic speed generator operating in dual mode for shock test and driving method thereof |
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