CN109211583A - A kind of automobile power assembly active engine mount test-bed - Google Patents
A kind of automobile power assembly active engine mount test-bed Download PDFInfo
- Publication number
- CN109211583A CN109211583A CN201810928380.3A CN201810928380A CN109211583A CN 109211583 A CN109211583 A CN 109211583A CN 201810928380 A CN201810928380 A CN 201810928380A CN 109211583 A CN109211583 A CN 109211583A
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- Prior art keywords
- engine mount
- active engine
- gauge block
- parenchyma gauge
- guide post
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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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention discloses a kind of automobile power assembly active engine mount test-beds, including bottom plate and the guide post being fixed on four angles of bottom plate, four angles of parenchyma gauge block are in axial sliding connection with guide post respectively, parenchyma gauge block is horizontally disposed, parenchyma gauge block upper surface is provided with shock electric machine and vibrating sensing component, detachable eccentric massblock is provided on two output shafts of shock electric machine, the eccentric direction of eccentric massblock is identical, for fixing active engine mount between parenchyma gauge block and bottom plate, vibrating sensing component is used to detect the vibration parameters of parenchyma gauge block；Its advantage is that since the movement of the horizontal direction of parenchyma gauge block is constrained by guide post, so exciting force caused by shock electric machine is only able to drive parenchyma gauge block and component connected to it and moves up and down along guide post, to which active engine mount is only by the exciting force on vertical direction, to realize suspension one-way performance test, alleviate the weight of the test-bed, advantage simple with structure, easy to carry, at low cost.
Description
Technical field
The present invention relates to a kind of testing equipments of auto parts and components, more particularly, to a kind of automobile power assembly active engine mount
Test-bed.
Background technique
With the development of the automobile industry, requirement of the people for vehicle ride comfort is also higher and higher, and power assembly
Active engine mount is the part for improving vehicle NVH performance, carries the important function of vibration damping.Usual active engine mount is by total by power
At X, Y of generation and the exciting force in three directions of Z axis, and we are primarily upon the damping property of Z-direction in practical application, institute
It is mainly used for testing the effectiveness in vibration suppression of Z-direction with active engine mount test-bed.
Traditional power assembly active engine mount test-bed can be divided into two degrees of freedom active engine mount test-bed and based on power
Learn the active engine mount test-bed of test with analog machine (hereinafter referred to as MTS equipment).Two degrees of freedom active engine mount test-bed
Upper layer and lower layer mass block, exciting source and detection system are generally comprised, exciting source setting is being improved quality on block, improve quality block and lower matter
The space for installing damping assembly (active engine mount, passive suspension) is provided between gauge block, lower mass block is mounted on elastic group
On part, lower mass block is connect with detection system.Exciting source includes alternating current generator and gear-box, and the output end of alternating current generator passes through connection
Axis device is connected with one end of gear-box, and the setting of the other end of gear-box is provided with one on each output shaft there are two output shaft
Eccentric massblock, two eccentric massblocks are equal in magnitude and are arranged symmetrically, and when test, speed change and reversing mechanism in gear-box make two
Root exports rotational axis direction on the contrary, at this point, the reverse rotation of two mass block constant speed makes testing stand with the exciting force in offset by the level of direction
Only generate the excitation of Z-direction.It is passed after damping assembly vibration isolation it can be seen that this test-bed generates excitation by exciting source
Lower mass block is passed, tests vibration parameters of the lower mass block before active engine mount control and after control eventually by detection system,
To obtain the damping property of the Z-direction of active engine mount.Although the active engine mount test-bed of this structure is able to achieve actively
The damping property of Z-direction is suspended, but the structure has the following deficiencies: 1, since the Static stiffness of active engine mount is higher, for drop
The quality of the intrinsic frequency of low system, improve quality block and lower mass block is very big, the lower layer in certain active engine mount test-beds
Nearly 300 kilograms of the quality of mass block so that entire test-bed seems abnormal heavy, be unfavorable for test-bed it is mobile while
Also increase processing and manufacturing cost；2, since such structure uses gear-box, make the quality of entire test-bed and at high cost；3,
It to be put into matched passive suspension simultaneously in testing to support, keep overall volume big, weight is big, and test result calculations are more
It is complicated.
Based on the active engine mount test-bed of MTS equipment by the way that active engine mount to be fixed in MTS equipment, by MTS equipment
It motivates end to generate displacement excitation, and can guarantee only to generate unidirectional displacement excitation, furthermore the included displacement sensing of MTS equipment
Device and force snesor are also convenient for the acquisition of active engine mount performance parameter, have the advantages that test is accurate.But the shortcomings that testing stand
It is required MTS equipment for external import, price is prohibitively expensive, and fancy price makes medium-sized and small enterprises and colleges and universities be difficult to hold
By, and MTS equipment belongs to precision equipment, care and maintenance higher cost, operation is extremely complex, and special technical staff is needed to grasp
Make, furthermore active engine mount embodies the effectiveness in vibration suppression of system only by data in the testing stand, not intuitively.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of structures it is simple, light-weight, easy to carry, at low cost and grasp
Make convenient automobile power assembly active engine mount test-bed.
The technical scheme of the invention to solve the technical problem is: a kind of automobile power assembly active engine mount test
Rack, including rack and parenchyma gauge block, the rack include bottom plate and are fixed on four angles of the bottom plate
Guide post, the bottom plate fixed by fixation kit, four angles of the parenchyma gauge block pass through respectively slide assemblies with
The guide post is in axial sliding connection, and the parenchyma gauge block is horizontally disposed, and the upper surface of the parenchyma gauge block is provided with
Shock electric machine and vibrating sensing component, the shock electric machine are double output shaft electric machines, two output shafts of the shock electric machine
On be provided with detachable eccentric massblock, the eccentric direction of the eccentric massblock is identical, the parenchyma gauge block with
For fixing active engine mount between the bottom plate, the vibrating sensing component is used to detect the vibration of the parenchyma gauge block
Parameter.
The slide assemblies include linear bearing and connecting plate, and the linear bearing is set in the guide post
On, the pedestal of the linear bearing is fixedly connected with the lower end of the connecting plate, the upper end of the connecting plate with it is described
Parenchyma gauge block be fixedly connected.Linear bearing and guide post share 4 pairs, are evenly arranged on four angles of parenchyma gauge block, linear bearing
It can only move up and down along guide post, shock electric machine can generate the exciting force of plane, can be analyzed to horizontal direction and vertical direction
Exciting force, since the movement of parenchyma gauge block horizontal direction is constrained by guide post, thus the power of horizontal direction by guide post, sliding
Component counteracts, the component edge that exciting force caused by shock electric machine is only able to drive parenchyma gauge block and connect with parenchyma gauge block
The axis direction of guide post moves up and down, so that active engine mount is only by the exciting force on vertical direction, to realize the unidirectional (side Z
To) performance test.
The upper end of the guide post is horizontally disposed stiffener assembly, and the stiffener assembly includes waling stripe and L-type
Connector, for the connector shaft to the jack to match with the guide post is provided with, the connector includes two
A orthogonal linking arm is provided with the mounting hole for being inserted into the waling stripe on the linking arm, described
Connector is set in the guide post and is fixed by the jack, and the both ends of the waling stripe are inserted into respectively
The corresponding mounting hole is fixed.4 guide post upper ends are linked together by the connector and waling stripe of L-type to improve
The rigidity of guide post in the horizontal direction keeps test-bed stability of the invention good.
It further include control system, the vibrating sensing component is an acceleration transducer, the acceleration transducer
It is connect with the control system, the control system is connect with active engine mount.Acceleration transducer is for recording principal mass
The Vibration Condition of block, and control system is fed back to using collected acceleration signal as error signal, control system receives
Corresponding electric current is inputted to change the dynamic characteristic of active engine mount to the electromagnetic actuator in active engine mount after feedback signal, thus
Achieve the purpose that reduce the vibration of parenchyma gauge block.
The upper end of the eccentric massblock is provided with the through-hole to match with the output shaft, the eccentric mass
The bolt hole being connected with the through-hole is provided on the side wall of block, the eccentric massblock is arranged by the through-hole
On the output shaft, the eccentric massblock by bolt is screwed into the bolt hole, and to withstand the output shaft solid
It is fixed.Eccentric massblock is Demountable, the size of the adjustable exciting force of eccentric massblock by replacing different quality,
Simultaneously by changing the revolving speed of shock electric machine, the range for the exciting force that can be generated is 0-343N, the test model with analog
Enclose big advantage.
The shock electric machine be it is single-phase asynchronous electronic, a stepless time adjustment is provided on the power supply line of the shock electric machine
Device, the electrodeless speed regulator have multiple gears, and the shock electric machine uses 220V standard household AC electrical, the exciting electricity
The maximum speed of machine is 3000r/min, and the frequency range for the exciting force that the shock electric machine can be generated is 0-50Hz.Exciting
Motor uses the standard household AC electrical of 220V, and low to being required with electric condition, use is more convenient；It is electrodeless that it is provided with one on the power line
Governor, the frequency of adjustable exciting force, convenient for the working performance under test active engine mount different operating frequency band.
The upper branch arm for fixed suspension support arm, the upper branch arm packet are provided on the lower surface of the parenchyma gauge block
It includes attachment base and the link block extended downwardly on the attachment base is set, the attachment base is fixedly connected on the master
On the bottom surface of mass block, the link block is used to be fixedly connected with suspension support arm.
Gap between the lower surface of the attachment base and the top surface for suspending shell is not less than 10mm.To guarantee in upper branch
It will not collide with active engine mount when arm is by exciting force from shock electric machine.
It is provided with suspension mounting base on the bottom plate, is provided on the upper surface of the suspension mounting base upward
Boss, the inclination mounting surface to match with suspension pedestal is provided on the upper surface of the boss.It is in active engine mount
Vertical state.
The fixation kit includes fastening bolt.
Compared with the prior art, the advantages of the present invention are as follows disclose a kind of automobile power assembly active engine mount testing stand
Frame, is respectively arranged with eccentric massblock on two output shafts of the shock electric machine of this test-bed, two eccentric massblocks it is inclined
Heart direction is identical, and output shaft drives eccentric massblock rotating Vortex, so that shock electric machine only generates the exciting force of plane, without producing
Raw torque, the exciting force for simulated engine；The exciting force that shock electric machine generates plane can be analyzed to horizontal direction and vertical
The power in direction, since parenchyma gauge block is slidably arranged in guide post by slide assemblies, parenchyma gauge block can only be done along guide post
Lower movement, it can be seen that the movement of the horizontal direction of parenchyma gauge block is constrained by guide post, so the power of horizontal direction by guide post,
Slide assemblies counteract, at this point, the power of the only vertical direction of exciting force caused by shock electric machine is effective, i.e. the excitation of Z-direction
Effectively, the power of vertical direction drives parenchyma gauge block and the component connecting with parenchyma gauge block to transport up and down along the axis direction of guide post
It is dynamic, so that the unidirectional stress condition of active engine mount Z axis in power assembly is simulated, by vibrating sensing component detection to parenchyma gauge block
Vibration parameters feed back to control system, by after accordingly calculating it can be seen that effectiveness in vibration suppression of the active engine mount after controlling；This
Invention has the advantage that
1, traditional lower mass block, gear-box is omitted, can be used for directly detecting the performance of active engine mount to be detected, without additional
Increase other matched passive suspensions, has the advantages that structure is simple, weight substantially reduces, is easy to carry, is at low cost；
2, eccentric massblock be Demountable, by replace different quality the adjustable exciting force of eccentric massblock it is big
It is small, while the revolving speed by changing shock electric machine, the range for the exciting force that can be generated are 0-343N, the trial stretch of analog
Greatly；
3, since the present invention is served only for one-way performance test, directly active engine mount to be detected is tested for the property, is operated
Simply, convenient, active engine mount can visual simulation for the effectiveness in vibration suppression of system.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the present invention with active engine mount cooperation；
Fig. 2 is structural schematic diagram of the invention；
Fig. 3 is the structural schematic diagram that shock electric machine of the invention is connect with eccentric massblock；
Fig. 4 is the structural schematic diagram of connector of the invention；
Fig. 5 is the structural schematic diagram of eccentric massblock of the invention；
Fig. 6 is the cross-sectional view of eccentric massblock of the invention；
Fig. 7 is the structural schematic diagram of upper branch arm of the invention；
Fig. 8 is the structural schematic diagram of suspension mounting base of the invention；
Fig. 9 is the structure diagram that the present invention is connect with control system.
Specific embodiment
The present invention will be described in further detail below with reference to the embodiments of the drawings.
Embodiment one: as shown in Figure 1-Figure 3, a kind of automobile power assembly active engine mount test-bed, including rack 1 and master
Mass block 2, rack 1 include bottom plate 11 and guide post 12, and bottom plate 11 is fixed by fixation kit (not shown), guide post
12 are fixed on four angles of bottom plate 11 by shaft stool 13, four angles of parenchyma gauge block 2 pass through respectively slide assemblies 3 with
Guide post 12 is in axial sliding connection, and parenchyma gauge block 2 is horizontally disposed, and the upper surface of parenchyma gauge block 2 is provided with shock electric machine 4 and vibration
Sensory package, shock electric machine 4 are double output shaft electric machines, are provided with detachable bias on two output shafts 41 of shock electric machine 4
The eccentric direction of mass block 5, eccentric massblock 5 is identical, for fixing active engine mount 6 between parenchyma gauge block 2 and bottom plate 11, vibrates
Sensory package is used to detect the vibration parameters of parenchyma gauge block 2.
Embodiment two: a kind of automobile power assembly active engine mount test-bed, including rack 1 and parenchyma gauge block 2, machine rack
1 includes bottom plate 11 and guide post 12, and bottom plate 11 is fixed by fixation kit (not shown), and guide post 12 passes through shaft stool
13 are fixed on four angles of bottom plate 11, and four angles of parenchyma gauge block 2 pass through slide assemblies 3 respectively and guide post 12 is axial
It is slidably connected, parenchyma gauge block 2 is horizontally disposed, and the upper surface of parenchyma gauge block 2 is provided with shock electric machine 4 and vibrating sensing component, swashs
The motor 4 that shakes is double output shaft electric machines, is provided with detachable eccentric massblock 5 on two output shafts 41 of shock electric machine 4, eccentric
The eccentric direction of mass block 5 is identical, and for fixing active engine mount 6 between parenchyma gauge block 2 and bottom plate 11, vibrating sensing component is used
In the vibration parameters of detection parenchyma gauge block 2.
In this particular embodiment, slide assemblies 3 include linear bearing 31 and connecting plate 32, and linear bearing 31, which is set in, leads
To on column 12, the pedestal of linear bearing 31 is fixedly connected with the lower end of connecting plate 32, and the upper end of connecting plate 32 and parenchyma gauge block 2 are solid
Fixed connection.
In this particular embodiment, the upper end of guide post 12 is horizontally disposed stiffener assembly 7, and stiffener assembly 7 includes level
Connecting rod 71 and the connector of L-type 72, connector 72 is axial to be provided with the jack 721 to match with guide post 12, and connector 72 wraps
Two orthogonal linking arms 722 are included, the mounting hole 723 for being inserted into waling stripe 71 is provided on linking arm 722, even
Fitting 72 is set in guide post 12 and is fixed by jack 721, and corresponding mounting hole is inserted at the both ends of waling stripe 71 respectively
723 is fixed.
In this particular embodiment, the upper end of eccentric massblock 5 is provided with the through-hole 51 to match with output shaft 41, eccentric
The bolt hole 52 being connected with through-hole 51 is provided on the side wall of mass block 5, eccentric massblock 5 is set in output by through-hole 51
On axis 41, eccentric massblock 5 is screwed into bolt hole 52 by bolt and withstands the fixation of output shaft 41.
In this particular embodiment, shock electric machine 4 is single-phase asynchronous electronic, is provided with one on the power supply line of shock electric machine 4
Electrodeless speed regulator 42, electrodeless speed regulator 42 have multiple speed regulation stalls, and shock electric machine 4 uses 220V standard household AC electrical, swash
The maximum speed of vibration motor 4 is 3000r/min, and the frequency range for the exciting force that shock electric machine 4 can be generated is 0- 50Hz.
In this particular embodiment, fixation kit (not shown) includes fastening bolt (not shown).
Embodiment three: other structures are identical as embodiment two, the difference is that, as shown in fig. 7, parenchyma gauge block 2
The upper branch arm 8 for fixed suspension support arm 61 is provided on lower surface, upper branch arm 8 includes attachment base 81 and is arranged in attachment base 81
On the link block 82 that extends downwardly, attachment base 81 is fixedly connected on the bottom surface of parenchyma gauge block 2, and link block 82 is used for and suspension branch
Arm 61 is fixedly connected.There are five 811,5 bolt (not shown) of the first fixation hole to pass through first for setting on attachment base 81
Upper branch arm 8 and parenchyma gauge block 2 are rigidly connected by fixation hole 811, and there are two the second fixation hole 821, suspensions for setting on link block 82
Support arm 71 passes through the second fixation hole 821 by bolt (not shown) and is rigidly connected with link block 82.
In this particular embodiment, the gap between the lower surface of attachment base 81 and the top surface for suspending shell 62 is not less than
10mm。
In this particular embodiment, it is provided with suspension mounting base 9 on bottom plate 11, suspends and is arranged on the upper surface of mounting base 9
There is upward boss 91, the inclination mounting surface 911 to match with suspension pedestal 63 is provided on the upper surface of boss 91.
In this particular embodiment, the intrinsic frequency of system is according to formulaIt is calculated, wherein ω indicates system
The intrinsic frequency of system, k indicate that the Static stiffness of active engine mount 6, m are indicated by shock electric machine 4, parenchyma gauge block 2, connecting plate 32, straight line
The gross mass for the system of bearing 31, upper branch arm 8 constituted.
Example IV, other structures are identical as embodiment three, the difference is that, as shown in figure 9, the test-bed is also
Including control system 14, vibrating sensing component is an acceleration transducer 10, and acceleration transducer 10 and control system 13 connect
It connects, control system 14 is connect with active engine mount 6.Acceleration transducer 10 is used to record the Vibration Condition of parenchyma gauge block 2, and will adopt
The acceleration signal collected feeds back to control system 14 as error signal, and control system 14 receives after feedback signal to actively
Electromagnetic actuator (not shown) in suspension 6 inputs corresponding electric current to change the dynamic characteristic of active engine mount 6, to reach
To the purpose for reducing the vibration of parenchyma gauge block 2.Wherein, control system 14 is existing structure, including charge amplifier 141, power supply
142, electronic control unit 143 and computer 144.
In this particular embodiment, control is fed back to by the Vibration Condition that acceleration transducer 10 acquires parenchyma gauge block 2
System 14, the control system 14 of active engine mount 6 reduce the vibration of parenchyma gauge block 2 by the dynamic characteristic of control active engine mount 6,
To form a closed-loop system, the control algolithm by changing control system 14 can be outstanding with the active of test application algorithms of different
Set 6 effectiveness in vibration suppression.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, the range for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (10)
1. a kind of automobile power assembly active engine mount test-bed, it is characterised in that including rack and parenchyma gauge block, the machine
Frame includes the guide post on bottom plate and four angles for being fixed at the bottom plate, and the bottom plate is solid by fixation kit
Fixed, four angles of the parenchyma gauge block pass through slide assemblies respectively and are in axial sliding connection with the guide post, the master
Mass block is horizontally disposed, and the upper surface of the parenchyma gauge block is provided with shock electric machine and vibrating sensing component, the exciting
Motor is double output shaft electric machines, is provided with detachable eccentric massblock on two output shafts of the shock electric machine, described
Eccentric massblock eccentric direction it is identical, for fixing active engine mount between the parenchyma gauge block and the bottom plate, institute
The vibrating sensing component stated is used to detect the vibration parameters of the parenchyma gauge block.
2. a kind of automobile power assembly active engine mount test-bed according to claim 1, it is characterised in that the cunning
Dynamic component includes linear bearing and connecting plate, and the linear bearing is set in the guide post, the linear bearing
Pedestal be fixedly connected with the lower end of the connecting plate, the upper end of the connecting plate and parenchyma gauge block is fixed connects
It connects.
3. a kind of automobile power assembly active engine mount test-bed according to claim 1, it is characterised in that described leads
There is stiffener assembly to the upper end of column is horizontally disposed, the stiffener assembly includes the connector of waling stripe and L-type, the company
Fitting is axially provided with the jack to match with the guide post, and the connector includes two orthogonal connections
Arm, the mounting hole for being inserted into the waling stripe is provided on the linking arm, and the connector passes through described
Jack is set in the guide post and fixes, and the corresponding mounting hole is inserted at the both ends of the waling stripe respectively
It is fixed.
4. a kind of automobile power assembly active engine mount test-bed according to claim 1, it is characterised in that further include control
System processed, the vibrating sensing component are an acceleration transducer, the acceleration transducer and the control system
Connection, the control system are connect with active engine mount.
5. a kind of automobile power assembly active engine mount test-bed according to claim 2, it is characterised in that described is inclined
The upper end of heart mass block is provided with the through-hole to match with the output shaft, is provided on the side wall of the eccentric massblock
The bolt hole being connected with the through-hole, the eccentric massblock are set in the output shaft by the through-hole
On, the eccentric massblock, which by bolt is screwed into the bolt hole, to be withstood the output shaft and fixes.
6. a kind of automobile power assembly active engine mount test-bed according to claim 1, it is characterised in that described swashs
Shake motor be it is single-phase asynchronous electronic, an electrodeless speed regulator, the electrodeless tune are provided on the power supply line of the shock electric machine
Fast device has multiple speed regulation stalls, and the shock electric machine uses 220V standard household AC electrical, and the shock electric machine is most
High revolving speed is 3000r/min, and the frequency range for the exciting force that the shock electric machine can be generated is 0-50Hz.
7. a kind of automobile power assembly active engine mount test-bed according to claim 1, it is characterised in that the master
The upper branch arm for fixed suspension support arm is provided on the lower surface of mass block, the upper branch arm includes that attachment base and setting exist
The link block extended downwardly on the attachment base, the attachment base are fixedly connected on the bottom surface of the parenchyma gauge block,
The link block is used to be fixedly connected with suspension support arm.
8. a kind of automobile power assembly active engine mount test-bed according to claim 7, it is characterised in that the company
Gap between the lower surface of joint chair and the top surface for suspending shell is not less than 10mm.
9. a kind of automobile power assembly active engine mount test-bed according to claim 1, it is characterised in that the bottom
It is provided with suspension mounting base on plate, upward boss is provided on the upper surface of the suspension mounting base, described is convex
The inclination mounting surface to match with suspension pedestal is provided on the upper surface of platform.
10. a kind of automobile power assembly active engine mount test-bed according to claim 1, it is characterised in that described consolidates
Determining component includes fastening bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810928380.3A CN109211583A (en) | 2018-08-15 | 2018-08-15 | A kind of automobile power assembly active engine mount test-bed |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810928380.3A CN109211583A (en) | 2018-08-15 | 2018-08-15 | A kind of automobile power assembly active engine mount test-bed |
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| CN109211583A true CN109211583A (en) | 2019-01-15 |
Family
ID=64988056
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| CN201810928380.3A Pending CN109211583A (en) | 2018-08-15 | 2018-08-15 | A kind of automobile power assembly active engine mount test-bed |
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| CN109916641A (en) * | 2019-03-29 | 2019-06-21 | 华南理工大学 | A kind of active engine mount performance testing device |
| CN110146263A (en) * | 2019-05-14 | 2019-08-20 | 江阴圣世杰机械制造有限公司 | Cab of heavy truck suspension system assembly quality detection device and detection method |
| CN110849613A (en) * | 2019-03-29 | 2020-02-28 | 华南理工大学 | Dynamic characteristic testing device and system for voice coil actuator |
| CN113252265A (en) * | 2021-04-28 | 2021-08-13 | 南京航空航天大学 | Vibration damping and isolating visual general test bed |
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Application publication date: 20190115 |