CN116398581A - Crystal oscillator vibration damper for sounding rocket data transmission transmitter - Google Patents
Crystal oscillator vibration damper for sounding rocket data transmission transmitter Download PDFInfo
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- CN116398581A CN116398581A CN202310320319.1A CN202310320319A CN116398581A CN 116398581 A CN116398581 A CN 116398581A CN 202310320319 A CN202310320319 A CN 202310320319A CN 116398581 A CN116398581 A CN 116398581A
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- vibration
- data transmission
- crystal oscillator
- crystal
- transmission transmitter
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- 239000013078 crystal Substances 0.000 title claims abstract description 81
- 230000005540 biological transmission Effects 0.000 title claims abstract description 44
- 238000013016 damping Methods 0.000 claims abstract description 25
- 238000002955 isolation Methods 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 9
- 229910000838 Al alloy Inorganic materials 0.000 claims description 6
- 239000004816 latex Substances 0.000 claims description 6
- 229920000126 latex Polymers 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 3
- 230000009467 reduction Effects 0.000 description 13
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000003466 welding Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- 238000002156 mixing Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000011009 performance qualification Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Images
Classifications
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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
- F16F15/04—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 using elastic means
- F16F15/08—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 using elastic means with rubber springs ; with springs made of rubber and metal
- F16F15/085—Use of both rubber and metal springs
Abstract
The invention discloses a crystal vibration damping device for a sounding rocket data transmission transmitter, which is characterized by combining the vibration damping combined design ideas of vibration isolation and passive vibration resistance, comprising a crystal vibration damping shell structure with a vibration isolation mounting platform, wherein the vibration damping shell structure is an independent box body, the geometric shape of the inner cavity of the box body is hexahedron, and the box body is tightly matched with the appearance of a crystal vibration component of the sounding rocket data transmission transmitter and is provided with a gap with a set distance; the crystal oscillator component is connected with the circuit board in a matching way. The invention greatly improves the vibration resistance of the crystal oscillator of the sounding rocket data transmission transmitter, thereby ensuring the phase noise index and reliable operation of the data transmission transmitter under the condition of strong vibration.
Description
Technical Field
The invention belongs to the technical field of spacecraft communication, and relates to a crystal oscillator vibration damper for a sounding rocket data transmission transmitter.
Background
Crystal oscillators (crystal oscillators for short) are of great importance in aerospace vehicle systems, are known as the "heart" of the system, and are widely used in various subsystems, such as data transmission, navigation, relay terminals, measurement and control subsystems and the like. The crystal oscillator frequency provides clocks and local oscillation signals for various single machines through frequency multiplication, frequency division, frequency mixing, frequency synthesis and the like, so that the advantages and disadvantages of the crystal oscillator output signals directly determine the single machines, namely the performance of the whole star, and the importance of the crystal oscillator output signals is self-evident. The sounding rocket is required to experience severe environments from test to launching flight, and can generate severe vibration, meanwhile, the crystal oscillator is very sensitive to the vibration, and frequency drift and phase noise can be generated when the crystal oscillator is subjected to the vibration, so that the quality of an output signal of the crystal oscillator is affected. When the rocket is launched and flown, the data transmission transmitter needs to perform data transmission in real time in the whole process, so that high requirements are placed on the vibration resistance of equipment, and the reliable operation of the data transmission transmitter can be ensured only when a certain vibration resistance is achieved. The vibration resistance of the data transmission transmitter depends on the vibration resistance of the crystal oscillator, so that vibration resistance measures must be taken on the crystal oscillator to reduce the influence of the vibration on the crystal oscillator performance.
In the conventional vibration damping technology, the crystal oscillator is directly welded on the circuit board, and the crystal oscillator welded on the circuit board is reinforced and damped by adopting a mode of dispensing or pouring glue. A disadvantage of this conventional approach is that there is no adequate buffer between the circuit board and the crystal oscillator, and the vibration of the circuit board is directly transmitted to the crystal oscillator device. This presents a certain risk of uncontrollable potential. Test results show that reliable operation of the sounding rocket data transmission transmitter cannot be guaranteed by adopting a conventional vibration reduction technology.
For equipment installed on a sonde rocket platform, X, Y, Z three axis performance qualification random vibration test conditions total root mean square value was approximately 20GRMS. In the rocket flight process, the data transmission transmitter needs to perform data transmission in real time in the whole process. Under the working condition, high requirements are put forward on the vibration resistance of the data transmission transmitter element, if special vibration reduction measures are not adopted, the electric performance cannot meet the working requirements, and the crystal oscillator element with weak vibration resistance can be damaged. Patent CN103338020 a discloses a crystal oscillator vibration damper, which comprises a box body, a pressing plate and a plurality of damper pads, wherein the damper pads are made of silicone rubber materials. However, the vibration damping pad is pressed between the crystal oscillator and the box body and is fixed by welding spots of the crystal oscillator, so that the requirement on welding spots is high, and the vibration condition is severe in the process of the sounding rocket flying, so that the sounding rocket is easy to fall off. Patent CN 206790456U discloses a vibration-resistant low noise crystal oscillator comprising a housing, a base, an oscillating plate assembly, steel wires, flexible wires, copper tubes and pins. However, the vibration absorber only adopts a steel wire suspension mode to absorb vibration of an oscillator component in the crystal oscillator, has limited vibration absorption effect, is not suitable for a sounding rocket device, and is not beneficial to the fixation of the crystal oscillator. Patent CN 207184453U discloses a miniaturized anti-vibration structure, by setting up anti-vibration base below the PCB board and setting up the spring structure for connection between the PCB board and the anti-vibration base, the vibration of crystal oscillator is reduced. However, the vibration damping effect is limited and the fixation of the crystal oscillator is not facilitated only by installing the spring material on the base of the crystal oscillator module. Meanwhile, the vibration-resistant base has the problems of complex structure, difficult manufacture, large occupied size and the like, and is not suitable for environments with strict requirements on the volume and the weight of electronic equipment in a sounding rocket. In the process of launching and flying, the effective load in the sounding rocket needs to bear severe impact and vibration environment, so that effective and reliable vibration reduction design is needed to be implemented on crystal oscillator installation and connection in order to ensure the performance index of the data transmission transmitter.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a crystal oscillator vibration damper for a sounding rocket data transmission transmitter.
In order to achieve the above purpose, the invention provides a crystal oscillator vibration damping device for a sounding rocket data transmission transmitter, which comprises a crystal oscillator vibration damping shell structure with a vibration isolation mounting platform, wherein the crystal oscillator vibration damping shell structure is an independent box body, the geometric shape of the inner cavity of the box body is hexahedron, and the box body is tightly matched with the appearance of a crystal oscillator assembly of the sounding rocket data transmission transmitter and is provided with a gap with a set distance; the crystal oscillator component is connected with the circuit board in a matching way.
As an improvement of the device, the vibration reduction shell is made of aluminum alloy materials.
As an improvement of the device, the latex material is filled in the gap with a set distance, so that the latex material is used for absorbing energy to reduce vibration when the crystal oscillator assembly vibrates, and passive vibration resistance is realized.
As a modification of the above device, the gap of the set distance is 2.5mm-2.8mm.
As an improvement of the device, the functional pins of the crystal oscillator assembly are connected with the circuit board by flexible wires, and the functional pins are connected with the circuit board by electrical performance.
As an improvement of the above device, the nominal section of the cord is 0.1mm 2 -0.3mm 2 。
Compared with the prior art, the invention has the advantages that:
the invention designs a vibration damping device combining vibration isolation and passive vibration resistance, which comprises a vibration damping shell structure and a connection mode of a crystal oscillator assembly and a circuit board, wherein the vibration damping shell structure is designed as an independent aluminum alloy box body for meeting the mechanical, electrical and thermal requirements of a sounding rocket flight task; the crystal oscillator component and the circuit board which are arranged in the vibration reduction shell structure are connected by adopting the thin flexible wires, so that the vibration resistance of the crystal oscillator of the sounding rocket data transmission transmitter is greatly improved, and the phase noise index and the reliable operation of the data transmission transmitter under the strong vibration condition are ensured.
Drawings
FIG. 1 is a schematic diagram of the installation of a crystal vibration damper for a sonde rocket data transmission transmitter of the present invention;
FIG. 2 is a schematic diagram of the internal structure of a crystal vibration damping device;
FIG. 3 is a graph showing the results of a vibration condition phase noise test using the apparatus of the present invention.
Detailed Description
The crystal vibration damping device for the sounding rocket data transmission transmitter comprises a vibration damping shell structure with a vibration isolation mounting platform and a crystal vibration assembly connecting mode, wherein the position of the crystal vibration damping device in the sounding rocket data transmission transmitter is shown in figure 1. The specific structure of the crystal vibration damping device is shown in figure 2. Firstly, a vibration reduction shell structure is designed, a crystal oscillator circuit and a shell of a crystal oscillator are isolated and protected through the vibration reduction structure, so that vibration cannot be effectively transmitted to a crystal resonator sensitive to vibration, wherein the vibration reduction shell structure is designed into an independent aluminum alloy box body, and the geometric shape of an inner cavity is a hexahedron tightly matched with the appearance of a crystal oscillator assembly. Because the density of the aluminum alloy is only 1/3 of that of steel, the aluminum alloy is particularly useful for reducing the weight of the whole structure, is more suitable for a sounding rocket platform with strict weight requirements, has similar specific modulus with steel, and has good electric conductivity, thermal conductivity and electromagnetic shielding performance. Secondly, a gap is reserved between each outer surface of the crystal oscillator assembly and each inner surface of the corresponding vibration reduction shell inner cavity, and latex materials are filled in the gap, so that the purpose that the damping materials absorb energy to reduce vibration during vibration is achieved. Thirdly, in order to avoid the influence of the connecting cable on the vibration reduction effect, the crystal oscillator function pins are connected with the circuit board through thin and soft wires, so that the transmission of vibration is released, and the connection of electrical performance is performed.
The technical scheme of the invention is described in detail below with reference to the accompanying drawings and examples.
Examples
The embodiment of the invention provides a vibration damper for a crystal oscillator of a sounding rocket data transmission transmitter, which comprises a vibration damper shell structure and a crystal oscillator assembly connection mode. The vibration damping device is characterized in that the geometrical shape of the inner cavity of the vibration damping shell is hexahedron which is tightly matched with the appearance of the crystal oscillator assembly at the installation level. The size of the crystal oscillator assembly is 20mm x 10mm, and the inner surface size of a cavity for installing the crystal oscillator assembly is 25mm x 15mm. A gap of 2.5mm-2.8mm is reserved between each outer surface of the crystal oscillator assembly and each inner surface of the corresponding vibration reduction shell inner cavity, a gap of 2.5mm is reserved in the embodiment, and latex materials with the thickness of approximately 2.5mm are filled in the gap. After the latex material is filled, the crystal oscillator cover plate is fastened by using screws. The second characteristic is that, in the connection mode, the crystal oscillator component and the circuit board adopt a nominal section of 0.1mm 2 -0.3mm 2 Is subjected to the transmission of soft wire release vibration and is electrically connected with the soft wireAnd (5) connecting. The nominal section of the cord used in this example was 0.1mm 2 。
Experiments prove that in the performance identification random vibration test, if vibration reduction measures are not adopted, the crystal oscillator adopts a traditional installation mode of directly welding on a circuit board, the phase noise of a data transmission transmitter is deteriorated, the spurious emissions are increased, the data loss can occur in the data transmission process, the mechanical and electrical performance of the data transmission cannot meet the working requirements, and the crystal oscillator element is damaged inside. After the measures of the invention are adopted, the vibration reduction effect on the crystal oscillator is ensured, and the working stability and reliability of the sounding rocket data transmission transmitter under the strong vibration condition are comprehensively improved. As shown in fig. 3, in the performance evaluation random vibration test, the phase noise index of the output signal of the data transmission transmitter is not deteriorated, the spurious phenomenon caused by vibration is avoided, and the error code is avoided in the vibration whole process data transmission detection. The invention ensures that the sounding rocket data transmission transmitter can effectively and reliably complete data transmission tasks under the strong vibration condition, and ensures the success of sounding rocket flight task data transmission.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention and are not limiting. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present invention, which is intended to be covered by the appended claims.
Claims (6)
1. The crystal vibration damping device for the sounding rocket data transmission transmitter is characterized by comprising a crystal vibration damping shell structure with a vibration isolation mounting platform, wherein the crystal vibration damping shell structure is an independent box body, the geometric shape of the inner cavity of the box body is hexahedron, and the crystal vibration damping shell structure is tightly matched with the appearance of a crystal vibration component of the sounding rocket data transmission transmitter and is provided with a gap with a set distance; the crystal oscillator component is connected with the circuit board in a matching way.
2. A crystal oscillator vibration damper for a sounding rocket data transmission transmitter as recited in claim 1, wherein said vibration damper housing is made of aluminum alloy material.
3. The crystal vibration damper for a sounding rocket data transmission transmitter of claim 1, wherein the gap with a set distance is filled with latex material for absorbing energy to reduce vibration when the crystal vibration assembly vibrates, thereby realizing passive vibration resistance.
4. A crystal oscillator vibration damper for a sounding rocket data transmission transmitter according to claim 1, wherein the gap of the set distance is 2.5mm-2.8mm.
5. The crystal oscillator vibration damper for sounding rocket data transmission transmitter of claim 1, wherein flexible wires are used for connection between functional pins of the crystal oscillator assembly and a circuit board, and connection of electrical performance is performed.
6. A crystal vibration damper for a sounding rocket data transmission transmitter as recited in claim 1, wherein said flexible wire has a nominal cross section of 0.1mm 2 -0.3mm 2 。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310320319.1A CN116398581A (en) | 2023-03-29 | 2023-03-29 | Crystal oscillator vibration damper for sounding rocket data transmission transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310320319.1A CN116398581A (en) | 2023-03-29 | 2023-03-29 | Crystal oscillator vibration damper for sounding rocket data transmission transmitter |
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| Publication Number | Publication Date |
|---|---|
| CN116398581A true CN116398581A (en) | 2023-07-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310320319.1A Pending CN116398581A (en) | 2023-03-29 | 2023-03-29 | Crystal oscillator vibration damper for sounding rocket data transmission transmitter |
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Citations (14)
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| JPH09225401A (en) * | 1996-02-22 | 1997-09-02 | Fukoku Co Ltd | Alarm vibrator |
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| CN206790456U (en) * | 2017-04-18 | 2017-12-22 | 辽阳鸿宇晶体有限公司 | Antivibration low noise crystal oscillator |
| 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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-
2023
- 2023-03-29 CN CN202310320319.1A patent/CN116398581A/en active Pending
Patent Citations (14)
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| JPH09225401A (en) * | 1996-02-22 | 1997-09-02 | Fukoku Co Ltd | Alarm vibrator |
| CN1261994A (en) * | 1997-07-09 | 2000-08-02 | “黑晶”公开股份公司 | Thermostatically controlled quartz generator |
| CN1660928A (en) * | 1999-03-16 | 2005-08-31 | 三井化学株式会社 | Rubber compositions and uses thereof |
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