CN107387654A - A kind of rope draws the passive crystal oscillator vibration absorber of translation - Google Patents
A kind of rope draws the passive crystal oscillator vibration absorber of translation Download PDFInfo
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- CN107387654A CN107387654A CN201710571603.0A CN201710571603A CN107387654A CN 107387654 A CN107387654 A CN 107387654A CN 201710571603 A CN201710571603 A CN 201710571603A CN 107387654 A CN107387654 A CN 107387654A
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- rope
- translation
- crystal oscillator
- hauling rope
- governor motion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention discloses a kind of rope to draw the passive crystal oscillator vibration absorber of translation; including the circumferential seat as frame, the rope governor motion I being located on circumferential seat; and pass through hauling rope connecting strand governor motion I and protected vibration reduction platform; micro regulation is carried out to the rope length of hauling rope by rope governor motion I, so that protected vibration reduction platform is stable in the fixed frequency of needs.The present invention uses rope vibration damping, can effectively reduce the intrinsic frequency of vibration insulating system；By the different prestressing force and different topology form of rope, vibration damping on the orthogonal three translation directions in space can be realized；Because rope deformation has geometrical non-linearity, therefore the device has certain impact resistance again；Suo Yingli minor variations can cause the significant change of intrinsic frequency, it is therefore desirable to use high-precision rope governor motion, accurately realize the adjustable function of damping frequency.
Description
Technical field
The present invention relates to mechanical field of precision instruments, is related to vibration absorber, in particular to a kind of traction of rope of a kind of crystal oscillator
The passive crystal oscillator vibration absorber of translation.
Background technology
Frequency synthesizer in air environment needs crystal oscillator to provide reference signal for it, and there is high stability crystal oscillator phase to make an uproar
Outstanding advantages of sound is low, frequency stability of temperature is high, frequency accuracy is high, " heart " of system is referred to as in many fields,
Influence and govern the system even performance of spacecraft performance.But external environment has very big shadow to the service behaviour of crystal oscillator
Ring, being mainly manifested in the vibration of external environment and impact can make crystal oscillator output electric signal characteristic be deteriorated, phase noise increase, so as to
The requirement as high steady fundamental frequency signal can not be met.The design of crystal oscillator vibration insulating system, it should under conditions of bearing capacity is met
The intrinsic frequency of system is reduced to greatest extent, to be effectively isolated low-frequency vibration.But while reducing system frequency
The impact resistance of meeting attenuation systems；And foreign impacts can have a strong impact on the performance of air environment, or even cause equipment
Destroy.In addition, crystal oscillator also needs to meet the function in the orthogonal three translation directions vibration damping in space.Finally, as electronics is set
Standby complexity more and more higher, same electronic equipment often have multiple different working conditions, and the work under different operating modes
The frequency characteristic difference of suffered vibrational excitation when making is very big, therefore vibration absorber is also needed to the adjustable energy of damping frequency
Power.
Therefore needing vibration insulating system has nonlinear stiffness characteristics to take into account low frequency vibration damping, and shock resistance, space are mutually hung down
Four requirements of vibration damping and the adjustable grade of damping frequency on three straight translation directions：I.e. small amplitude motion when system stiffness it is low, energy
Enough low frequency vibration dampings；When amplitude is larger under percussion, system stiffness increased dramatically, being capable of shock resistance；Space is orthogonal
Vibration damping on three translation directions, realizes system vibration-damping function；Damping frequency is adjustable, crystal oscillator is can be suitably used for the work shape of complexity
Condition.
The crystal oscillator vibration absorber of current most of research institutions has following several limitations：First, most counting apparatus uses
Rubber, spring, steel wire rope and pad etc. are used as damping material, often higher using the vibration insulating system fundamental frequency of this damping material,
Low-frequency vibration can not be effectively isolated；Second, most vibration insulating systems are often according to a certain single-frequency or in a certain single degree of freedom
Vibration damping control is carried out on degree, its damping capacity does not have universality；3rd, many vibration absorber impact resistances are poor.
To avoid the limitation of above traditional design scheme, there is provided a kind of new vibration absorber --- rope draws translation quilt
Dynamic crystal oscillator vibration absorber turns into current this area technical problem urgently to be resolved hurrily.
The content of the invention
To solve drawbacks described above present in prior art, it is an object of the invention to provide a kind of traction translation of rope is passive
Crystal oscillator vibration absorber, low frequency vibration damping, shock resistance can be realized, vibration damping and damping frequency are adjustable on the translation direction of three, space
Function.
The present invention is realized by following technical proposals.
A kind of rope draws the passive crystal oscillator vibration absorber of translation, including circumferential seat as frame, is located on circumferential seat
Rope governor motion I, and by hauling rope connecting strand governor motion I and protected vibration reduction platform, pass through rope governor motion I
Micro regulation is carried out to the rope length of hauling rope, so that protected vibration reduction platform is stable in the fixed frequency of needs.
Further, the circumferential seat is rectangular frame structure, including is made up of eight supporting table connection support bars
Rectangular frame, each supporting table is cube structure, positioned at the vertex position of circumferential seat framework, affixed 3 ropes in its surface
Governor motion I and 3 support bars；Rope governor motion I is fixed in three planes where supporting table outermost summit.
Further, four rope governor motions I being diagonally distributed are set on each face of rectangular frame, and each rope is adjusted
It is connected in section mechanism I by hauling rope on each face of vibration reduction platform.
Further, support bar is L-type rod member, positioned at circumferential seat crest line position.
Further, the vibration reduction platform is shaped as square, orthopyramid, regular prism or spheroid；Vibration reduction platform is drawn
For cable stretching in the center of circumferential seat, it is cavity structure that it is internal, and for installing crystal oscillator, connection the is connected with its surface
The drag hook of two hauling ropes；The symmetrical tensioning of hauling rope is between each the monomer rope governor motion I and vibration reduction platform of circumferential seat.
Further, the hauling rope is six groups of identical Cable Structures, and every group of hauling rope is by the first hauling rope, the second hauling rope
Formed with grommet；First hauling rope one end is connected on the drag hook of rope governor motion I, and the other end is connected to the summit of grommet；The
Two hauling rope one end are connected to grommet summit, and the other end is connected on the drag hook on vibration reduction platform surface, at the same the first hauling rope and
The extended line of second hauling rope meets at same point, and the central axis for crossing the first hauling rope of the point passes through vibration reduction platform barycenter.
Further, the grommet is the enclosed construction that flexible cable is formed, and connects the first hauling rope and the second hauling rope, and opened
The shape of polygon is pulled into, it is located at the center on circumferential seat surface, and because the reason for the first traction cable stretching is slightly below
The surface of circumferential seat.
Further, the first hauling rope and the first hauling rope to the equal in magnitude with joint efforts, in opposite direction of grommet active force and
On same straight line so that grommet is in poised state, has the shape determined and position, sets traction in the x, y, and z directions
Rope, realize three translation direction vibration dampings of vibration reduction platform.
Further, the rope governor motion I includes being located at the mounting seat on supporting table surface, and is located in mounting seat mutually flat
Capable leading screw and two guide rails, sliding table are applied on leading screw and guide rail；Main scale is provided with the pedestal below mounting seat；
Indexing rotary table and brake are respectively equipped with the outside of mounting seat, secondary ruler is provided with indexing rotary table；At the top of sliding table
Provided with device for measuring force, the hook for connecting the first hauling rope is provided with the outside of device for measuring force.
Further, when brake is opened, rotated by leading screw, the damping frequency of vibration reduction platform is adjusted；Work as system
When dynamic device is closed, leading screw is locked, and the damping frequency of vibration reduction platform keeps constant in external environment.
The present invention uses rope vibration damping, can effectively reduce the intrinsic frequency of vibration insulating system；In advance should by the difference of rope
Power and different topology form, vibration damping on the orthogonal three translation directions in space can be realized；Because rope deformation has geometry
It is non-linear, therefore the device has certain impact resistance again；Suo Yingli minor variations can cause the obvious of intrinsic frequency
Change, it is therefore desirable to use high-precision rope governor motion, accurately realize the adjustable function of damping frequency.
The present invention has following advantage：
1. prestressing force, cross-sectional area and topological form that crystal oscillator vibration insulating system can be by changing hauling rope etc. change whole
The frequency characteristic of individual vibration insulating system, realize vibration damping on the orthogonal three translation directions of low frequency vibration damping and space.
2. rope deformation has geometrical non-linearity, shock loading can be effective against.
3. rope governor motion can realize the length regulation of high-precision rope, stress when dynamometer can intuitively show cable stretching is thin
Microvariations, realize the accurate regulation of vibration absorber frequency characteristic.
4. the mechanism of the present apparatus is symmetrical, it is simple in construction, take up space it is small, in light weight, be easy to practical, be worthy to be popularized.
Brief description of the drawings
Fig. 1 (a) and Fig. 1 (b) is the passive crystal oscillator vibration absorber shaft side figure of rope traction translation and top view respectively；
Fig. 2 is the rope traction passive crystal oscillator vibration absorber rope connected mode schematic diagram of translation；
Fig. 3 (a) and Fig. 3 (b) is the passive crystal oscillator vibration absorber rope governor motion shaft side figure of rope traction translation and vertical view respectively
Figure；
Fig. 4 is the rope traction passive crystal oscillator vibration absorber mounting seat schematic diagram of translation；
Fig. 5 is the rope traction passive crystal oscillator vibration absorber vibration reduction platform schematic diagram of translation；
In figure：1. the first hauling rope, 2. second hauling ropes, 3. grommets, 4. supporting tables, 5. support bars, I, rope governor motions,
6. mounting seat, 601. leading screw through holes, 602. guide rail through holes, 7. leading screws, 8. feed screw nuts, 9. guide rails, 10. sliding tables, 11.
Device for measuring force, 12. indexing rotary tables, 13. brakes, 14. secondary rulers, 15. main scales, 16. vibration reduction platforms.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
The structure of the present invention is explained in detail below in conjunction with the accompanying drawings.
As shown in Fig. 1 (a) and Fig. 1 (b), a kind of rope draws the passive crystal oscillator vibration absorber of translation, including the week as frame
Side bearing, the rope governor motion I being located on circumferential seat, and the protected vibration reduction platform 16 connected by hauling rope, lead to
Cross rope governor motion I and micro regulation is carried out to the rope length of hauling rope, needed so that protected vibration reduction platform 16 is stable
Fixed frequency on.
As shown in Fig. 1 (a) and Fig. 1 (b), circumferential seat is rectangular frame structure, including is connected by eight supporting tables 4
The rectangular frame that support bar 5 is formed, each supporting table 4 is cube structure, positioned at the vertex position of circumferential seat framework, its table
The affixed 3 rope governor motions I in face and 3 support bars 5；Rope governor motion I is fixed in three where the outermost summit of supporting table 4
Plane, four rope governor motions I being diagonally distributed are set on each face of cuboid framework, on each rope governor motion I
It is connected to by hauling rope on each face of vibration reduction platform 16.Support bar 5 is L-type rod member, positioned at circumferential seat crest line position.
Vibration reduction platform 16 is by traction cable stretching in the center of circumferential seat, and it is cavity structure that it is internal, for installing
Crystal oscillator；Hauling rope is six groups of identical Cable Structures, each monomer rope governor motion I and vibration reduction platform of the symmetrical tensioning in circumferential seat
Between 16.
As shown in Fig. 1 (a) and Fig. 1 (b) and Fig. 2, hauling rope is six groups of identical Cable Structures, and every group of hauling rope is led by first
Straw line 1, the second hauling rope 2 and grommet 3 form.First hauling rope 1 is made up of more flexible cables, and every flexible cable one end is connected to rope tune
On the drag hook for saving mechanism I, the other end is connected to the summit of grommet 3, with grommet 3 for the radial distribution of core.Second hauling rope 2 by
More flexible cable compositions, every flexible cable one end are connected to the summit of grommet 3, and the other end is connected on the drag hook on the surface of vibration reduction platform 16,
Simultaneously the flexible cable extended line of the first hauling rope 1 and the second hauling rope 2 meet at same point (if each flexible cable is parallel to each other, the point position
In unlimited distance), and the central axis for crossing the first hauling rope 1 of the point passes through the barycenter of vibration reduction platform 16.Grommet 3 is formed for flexible cable
Enclosed construction, connect the first hauling rope 1 and the second hauling rope 2, and the shape by tensioning into polygon, it is located at circumferential seat
The center on surface, and because the reason for the first 1 tensioning of hauling rope is slightly below the surface of circumferential seat.Wherein, the first hauling rope 1
With the first hauling rope 2 to the equal in magnitude with joint efforts, in opposite direction of the active force of grommet 3 and on the same line so that at grommet 3
In poised state, there is the shape determined and position.By adjusting the topological structure of grommet 3, vibration insulating system frequency characteristic is realized
Optimization.
Wherein, hauling rope is flexible tension structure, and only after prestressing force is applied, structure just has rigidity and determination
Shape, by the tensioning of vibration reduction platform 16 to the position of design.Pass through the form finding analysis based on FInite Element, it may be determined that vibration absorber exists
Prestress value and the geometry adaptable with prestressing force condition under very low intrinsic frequency.Will be mutually perpendicular in space
Three directions are set to X, Y and Z-direction, set hauling rope on direction of principal axis in the x, y, and z directions, because flexible cable stress can only be along certainly
The direction of body, you can in X, Y of vibration reduction platform 16 and Z-direction applying power, to realize that 16 3 translation directions of vibration reduction platform subtract
Shake.
As shown in Fig. 3 (a) and Fig. 3 (b), rope governor motion I includes being located at two mounting seats 6 on the surface of supporting table 4, is propping up
The support surface of platform 4 is fixedly connected along the direction of the first hauling rope 1；As shown in figure 4, leading screw 7 is arranged on the leading screw of the top position of mounting seat 6
In through hole 601, two guide rails 9 are symmetrically fixed in the guide rail through hole 602 of the lower position of mounting seat 6, and installation direction all phases
It is mutually parallel.Sliding table 10 is provided with through hole, the through hole of top the position correspondence with the installation leading screw 7 of mounting seat 6 and guide rail 9
It is fixedly connected with feed screw nut 8, the through hole of lower section coordinates with two guide rails 9.The convert rotational motion of leading screw 7 can be by the mechanism
The linear motion of sliding table 10；Device for measuring force 11 is fixedly connected with the upper surface of sliding table 10, by being filled positioned at dynamometry
The hook for putting 11 outsides connects the first hauling rope 1；By carrying out high-precision trace regulation to hauling rope, the hauling rope of regulation is pre-
Stress variation can be shown by device for measuring force 11；Indexing rotary table 12 is arranged on the outside of mounting seat 6, and is fixedly connected with leading screw 7,
I.e. rotation indexing rotary table 12 can drive leading screw 7 to be mounted opposite seat 6 and rotate, and realize micro prestressing force regulation；Brake 13 is fixed
The opposite side of mounting seat 6 is connected to, and coordinates with leading screw 7 and installs, realizes the locking of rope governor motion；I.e. when brake 13 is opened
When, leading screw 7 is free to rotate, and the damping frequency of vibration absorber is adjusted, and when brake 13 is closed, leading screw 7 is locked,
The damping frequency of device keeps constant in external environment.
Illustrate how indexing rotary table realizes the long accurate adjustment of rope below：
As shown in Fig. 3 (a) and Fig. 3 (b), n (n=20-80) individual decile is along the circumferential direction carved with indexing rotary table 12
Movable mark, a fixed scale is carved with the top of mounting seat 6 of installation indexing rotary table 12, as secondary ruler 14；In supporting table 4
Straight line is carved with along the axis direction of leading screw 7, its side is a ruler for having millimeter scale, and opposite side carves each millimeter
Degree is evenly divided into m (m=1/h) individual scale according to leading screw pitch h again, as main scale 15.Indexing rotary table 12 rotates a circle, sliding
Dynamic workbench 10 that is to say minimum one on main scale 15 just along a rotation axis side pitch h forward or backward distance
Individual graduation range.And indexing rotary table 12 rotates a scale of secondary ruler 14, sliding table 10 is just along before rotation axis direction
Enter or retreat h/n distance.During reading, millimeter is read from main scale 15, then reads remainder from secondary ruler 14, then
Two parts reading is added, and obtains measured value.
As shown in figure 5, the shape of vibration reduction platform 16 can be square, orthopyramid, regular prism or spheroid, vibration damping is connected to
The second hauling rope 2 on platform 16 is mutually perpendicular to two-by-two, and its tensioning is protected in the center of circumferential seat.It is internal for sky
Cavity configuration, for installing crystal oscillator, the drag hook of the second hauling rope 2 of connection is connected with its surface.
Illustrate vibration absorber is how to realize frequency regulation function below：
Hauling rope is flexible tension structure, and the size of prestress value has a great impact to its intrinsic frequency, by limited
First method analysis understands that, when prestress value is smaller, vibration insulating system can just obtain very low intrinsic frequency, i.e., to system frequency
Regulation need rope governor motion I that there is high-precision trace regulation.When prestressing force is adjusted, the braking of rope governor motion I is opened
Device 13, indexing rotary table 12 is rotated, micro regulation, the device for measuring force being connected with the first hauling rope 1 are carried out to the rope length of hauling rope
The specific change of stress when cable stretching can be shown on 11, after Stress relief to the prestress value obtained by analysis, open system
Dynamic device 13 locks rope governor motion I, the stable fixed frequency in needs of vibration absorber.
The invention is not limited in above-described embodiment, on the basis of technical scheme disclosed by the invention, the skill of this area
Art personnel are according to disclosed technology contents, it is not necessary to which performing creative labour can makes one to some of which technical characteristic
A little to replace and deform, these are replaced and deformation is within the scope of the present invention.
Claims (10)
1. a kind of rope draws the passive crystal oscillator vibration absorber of translation, it is characterised in that including the circumferential seat as frame, is located at week
Rope governor motion I on the bearing of side, and by hauling rope connecting strand governor motion I and protected vibration reduction platform (16), lead to
Cross rope governor motion I and micro regulation is carried out to the rope length of hauling rope, needed so that protected vibration reduction platform (16) is stable
In the fixed frequency wanted.
2. rope according to claim 1 draws the passive crystal oscillator vibration absorber of translation, it is characterised in that the circumferential seat is
Rectangular frame structure, including the rectangular frame being made up of eight supporting table (4) connection support bars (5), each supporting table (4)
For cube structure, positioned at the vertex position of circumferential seat framework, its surface affixed (3) individual rope governor motion I and (3) root support
Bar (5)；Rope governor motion I is fixed in three planes where supporting table (4) outermost summit.
3. rope according to claim 2 draws the passive crystal oscillator vibration absorber of translation, it is characterised in that in rectangular frame
Four rope governor motions I being diagonally distributed are set on each face, vibration damping is connected to by hauling rope on each rope governor motion I
On each face of platform (16).
4. rope according to claim 2 draws the passive crystal oscillator vibration absorber of translation, it is characterised in that support bar (5) is L-type
Rod member, positioned at circumferential seat crest line position.
5. rope according to claim 1 draws the passive crystal oscillator vibration absorber of translation, it is characterised in that the vibration reduction platform
(16) be shaped as square, orthopyramid, regular prism or spheroid；Vibration reduction platform (16) is by traction cable stretching in circumferential seat
Heart position, it is cavity structure that it is internal, and for installing crystal oscillator, the drag hook of the second hauling rope of connection (2) is connected with its surface；Lead
The symmetrical tensioning of straw line is between each the monomer rope governor motion I and vibration reduction platform (16) of circumferential seat.
6. rope according to claim 1 draws the passive crystal oscillator vibration absorber of translation, it is characterised in that the hauling rope is six
Group identical Cable Structure, every group of hauling rope are made up of the first hauling rope (1), the second hauling rope (2) and grommet (3)；First traction
Rope (1) one end is connected on the drag hook of rope governor motion I, and the other end is connected to the summit of grommet (3)；Second hauling rope (2) one
End be connected to grommet (3) summit, the other end is connected on the drag hook on vibration reduction platform (16) surface, at the same the first hauling rope (1) and
The extended line of second hauling rope (2) meets at same point, and the central axis for crossing the first hauling rope (1) of the point passes through vibration reduction platform
(16) barycenter.
7. rope according to claim 6 draws the passive crystal oscillator vibration absorber of translation, it is characterised in that first hauling rope
(1) it is made up of with the first hauling rope (2) more flexible cables, grommet (3) is the enclosed construction that flexible cable is formed, and connects the first hauling rope
(1) and the second hauling rope (2), and the shape by tensioning into polygon, it is located at the center on circumferential seat surface, slightly below
The surface of circumferential seat.
8. rope according to claim 7 draws the passive crystal oscillator vibration absorber of translation, it is characterised in that the first hauling rope (1)
With the first hauling rope (2) to the equal in magnitude with joint efforts, in opposite direction of grommet (3) active force and on the same line so that grommet
(3) poised state is in, there is the shape determined and position, hauling rope is set in the x, y, and z directions, realizes vibration reduction platform three
Individual translation direction vibration damping.
9. rope according to claim 1 draws the passive crystal oscillator vibration absorber of translation, it is characterised in that the rope governor motion
I includes being located at the mounting seat (6) on supporting table (4) surface, and is located at the leading screw (7) being parallel to each other in mounting seat (6) and two are led
Rail (9), sliding table (10) are applied on leading screw (7) and guide rail (9)；Main scale is provided with the pedestal below mounting seat (6)
(15)；Indexing rotary table (12) and brake (13) are respectively equipped with the outside of mounting seat (6), secondary ruler is provided with indexing rotary table (12)
(14)；It is provided with device for measuring force (11) at the top of sliding table (10), the connection first that is provided with the outside of device for measuring force (11) is led
The hook of straw line (1).
10. rope according to claim 9 draws the passive crystal oscillator vibration absorber of translation, it is characterised in that when brake (13)
During opening, rotated by leading screw (7), the damping frequency of vibration reduction platform (16) is adjusted；When brake (13) is closed, silk
Thick stick (7) is locked, and the damping frequency of vibration reduction platform (16) keeps constant in external environment.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710571603.0A CN107387654B (en) | 2017-07-13 | 2017-07-13 | A kind of passive crystal oscillator vibration absorber of rope traction translation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710571603.0A CN107387654B (en) | 2017-07-13 | 2017-07-13 | A kind of passive crystal oscillator vibration absorber of rope traction translation |
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| CN107387654A true CN107387654A (en) | 2017-11-24 |
| CN107387654B CN107387654B (en) | 2019-03-29 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109973576A (en) * | 2019-04-30 | 2019-07-05 | 北京无线电测量研究所 | A kind of bilayer low frequency crystal oscillator isolation mounting |
| CN112332796A (en) * | 2020-11-12 | 2021-02-05 | 中国电子科技集团公司第二十六研究所 | Vibration damper of airborne crystal oscillator |
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| US5944296A (en) * | 1996-05-29 | 1999-08-31 | Rieck; Thomas | Supporting foot for electroacoustic apparatus |
| EP2221501A2 (en) * | 2009-02-24 | 2010-08-25 | Howaldtswerke-Deutsche Werft GmbH | Shock damper |
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| CN109973576A (en) * | 2019-04-30 | 2019-07-05 | 北京无线电测量研究所 | A kind of bilayer low frequency crystal oscillator isolation mounting |
| CN109973576B (en) * | 2019-04-30 | 2021-01-05 | 北京无线电测量研究所 | Double-layer low-frequency crystal oscillator vibration isolation device |
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| CN112332796B (en) * | 2020-11-12 | 2024-02-20 | 中国电子科技集团公司第二十六研究所 | Vibration damper of airborne crystal oscillator |
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| Publication number | Publication date |
|---|---|
| CN107387654B (en) | 2019-03-29 |
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