CN115077286A - Flexible heat conducting plate for enhancing heat transfer path of resonance gyroscope inertial navigation unit and resonance inertial navigation system - Google Patents
Flexible heat conducting plate for enhancing heat transfer path of resonance gyroscope inertial navigation unit and resonance inertial navigation system Download PDFInfo
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- CN115077286A CN115077286A CN202210989515.3A CN202210989515A CN115077286A CN 115077286 A CN115077286 A CN 115077286A CN 202210989515 A CN202210989515 A CN 202210989515A CN 115077286 A CN115077286 A CN 115077286A
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- inertial navigation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C19/00—Gyroscopes; Turn-sensitive devices using vibrating masses; Turn-sensitive devices without moving masses; Measuring angular rate using gyroscopic effects
- G01C19/56—Turn-sensitive devices using vibrating masses, e.g. vibratory angular rate sensors based on Coriolis forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/10—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 by using measurements of speed or acceleration
- G01C21/12—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 by using measurements of speed or acceleration executed aboard the object being navigated; Dead reckoning
- G01C21/16—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 by using measurements of speed or acceleration executed aboard the object being navigated; Dead reckoning by integrating acceleration or speed, i.e. inertial navigation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
- F28D2021/0028—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for cooling heat generating elements, e.g. for cooling electronic components or electric devices
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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Gyroscopes (AREA)
Abstract
The invention relates to a flexible heat conducting plate for enhancing a heat transfer path of a resonance gyro inertial measurement unit and a resonance inertial measurement system, wherein the heat conducting plate is composed of rigid terminals at two ends and a middle flexible metal belt; rigid terminals at two ends are of L-shaped bent plate structures, and the rigid terminals are made of red copper plates; the middle flexible metal belt is formed by connecting a plurality of metal strips which are arranged in parallel at two ends, and the material of the middle flexible metal belt is purple copper foil; the two end parts of the middle flexible metal belt are respectively in surface contact with the rigid terminals at the two ends and are fixedly connected through screws; the rigid terminal at one end is a cold end terminal and is used for being in contact with and fixedly connected with the upper end face of an inertia assembly table body of the resonance inertial navigation system; and the rigid terminal at the other end is a hot end terminal and is used for being in contact with and fixedly connected with the upper end surface of the base of the resonance inertial navigation system. The invention effectively meets the heat dissipation requirement of the hemispherical resonance system.
Description
Technical Field
The invention belongs to the field of hemispherical resonance gyroscope inertial navigation, and particularly relates to a flexible heat-conducting plate for enhancing a heat transfer path of a resonance gyroscope inertial unit and a resonance inertial navigation system.
Background
Conventionally, an inertia Assembly (ISA) of a strapdown system is fixedly connected to a base, and heat on the ISA can be directly conducted to an external environment through the base. In order to enhance the vibration isolation effect of the ISA, the ISA is connected with the base through the vibration isolation rubber assembly, the heat conductivity coefficient of the rubber is extremely low, heat transfer between the ISA and the base is isolated, and good heat transfer paths are needed for heat conduction. When the resonant gyroscope works, micron-sized high-frequency micro-amplitude vibration excitation exists, vibration mutual interference can be generated between the gyroscopes through vibration conduction of the ISA, and therefore the rubber is used for connecting the gyroscopes to install the ISA and the bottom plate. The rubber has a heat insulation effect, and in order to meet the cooling requirement of the inertia element, a lead-in member for connecting the ISA and the base needs to be developed and designed, and the heat conduction member needs to have enough plastic deformation on one hand and high heat conductivity on the other hand.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a flexible heat conducting plate for enhancing a heat transfer path of a resonance gyro inertial navigation unit and a resonance inertial navigation system.
One of the above objects of the present invention is achieved by the following technical solutions:
a flexible heat conducting plate for enhancing a heat transfer path of a resonance gyro inertial measurement unit is characterized in that: the device is composed of rigid terminals at two ends and a middle flexible metal belt; rigid terminals at two ends are of L-shaped bent plate structures, and the rigid terminals are made of red copper plates; the middle flexible metal belt is formed by connecting a plurality of metal strips which are arranged in parallel at two ends, and the material of the middle flexible metal belt is purple copper foil; the two end parts of the middle flexible metal belt are respectively in surface contact with the rigid terminals at the two ends and are fixedly connected through screws; the rigid terminal at one end is a cold end terminal and is used for being in contact with and fixedly connected with the upper end face of an inertia assembly table body of the resonance inertial navigation system; and the rigid terminal at the other end is a hot end terminal and is used for being in contact with and fixedly connected with the upper end surface of the base of the resonance inertial navigation system.
Further: the whole thickness of middle flexible strap is 0.5mm thick, and the width of metal strip is 1mm, and the radical of metal strip is 20.
The second objective of the present invention is achieved by the following technical solutions:
a resonance inertial navigation system adopting the flexible heat-conducting plate for enhancing the heat transfer path of the resonance gyroscope inertial navigation unit in claim 1 or 2 comprises a resonance inertial navigation system body, wherein the resonance inertial navigation system body comprises an inertia assembly and a base, the inertia assembly and the base are connected through four vibration isolation rubber components uniformly distributed along the circumferential direction, and the resonance inertial navigation system is characterized in that: the four flexible heat-conducting plates are uniformly distributed along the circumference square and are arranged on the outer sides of the vibration isolation rubber components one by one, and cold end terminals of the four flexible heat-conducting plates are in surface contact with the upper end of the platform body of the inertia assembly and are fixedly connected through screws; the hot end terminals of the four flexible heat conducting plates are in surface contact with the upper end of the base and are fixedly connected through screws; the bottom parts of the hot end terminals of the four flexible heat conducting plates are provided with semicircular grooves for avoiding the vibration isolation rubber components; the height difference between the mounting surfaces of the cold end terminal and the hot end terminal of the flexible heat conducting plate is H, the length of the middle flexible metal strip of the flexible heat conducting plate is L, and L is larger than H.
Further: the length L of the middle flexible metal strip is 10% greater than the height difference H between the mounting surfaces of the cold end terminal and the hot end terminal of the flexible heat conducting plate.
The invention has the advantages and positive effects that:
1. the flexible heat conducting plate efficiently absorbs heat emitted by a heating device with high heat flux density through a small sectional area, and effectively transports the absorbed heat to a heat sink to efficiently release the heat; the L-shaped rigid terminal is designed to be in good contact with the heat transfer plane, and the high-flexibility metal belt is designed to effectively realize heat transfer between the platform body and the base of the inertia assembly, so that the heat dissipation requirement of the hemispherical resonance system is met.
2. The main body of the flexible heat conducting plate is made of copper foil materials, so that the rigidity of the plate can be reduced while heat transfer is ensured, and the middle flexible heat conducting belt is in a strip shape, so that the mass and the rigidity can be reduced; the two ends are rigid terminals for connecting the inertia assembly and the base, and the size and shape of the inertia assembly are designed according to the interface conditions of the resonance system and the flexible heat conducting plate.
3. According to the invention, the four flexible heat-conducting plates are connected with the inertial assembly table body and the base, so that the flexible heat-conducting plates are symmetrically arranged, and the flexible plates are fastened by screws in order to ensure the repeatability of each disassembly and assembly of the flexible plates; the base and the inertia assembly are connected into a heat transfer whole through the flexible heat conducting plate, on one hand, the gravity influence of the system on longitudinal displacement is reduced due to the requirement of the small mass of the flexible heat conducting plate, and on the other hand, the uniformity of heat transfer is ensured due to the requirement of symmetrical installation.
Drawings
FIG. 1 is a schematic view of the construction of a flexible heat-conducting plate of the present invention 1;
fig. 2 is a schematic structural view of the flexible heat-conducting plate of the present invention 2;
FIG. 3 is a schematic structural view of an L-shaped rigid terminal of the present invention;
FIG. 4 is a schematic view of the construction of the intermediate flexible metal strip of the present invention
FIG. 5 is a schematic diagram of a resonator gyroscope system incorporating a flexible heat-conducting plate according to the present invention;
FIG. 6 is a schematic diagram of the structure of the stage in a resonator gyroscope system of the present invention;
FIG. 7 is a simulation model diagram of the method for calculating longitudinal deformation after a flexible heat-conducting plate is installed in the resonant inertial navigation system.
Detailed Description
The structure of the present invention will be further described by way of examples with reference to the accompanying drawings. It is to be understood that this embodiment is illustrative and not restrictive.
A flexible heat conducting plate for enhancing the heat transfer path of a resonance gyroscope is composed of rigid terminals at two ends and a middle flexible metal strip, and is shown in figures 1 to 4. The flexible heat conducting plate has the characteristics of high heat conductivity and low rigidity, can realize thermal coupling connection between a platform body (a quadrangular frustum pyramid structure) and a base of an inertia assembly, and can realize high-efficiency heat exchange between a heating device and the outside while reducing vibration coupling.
The principle and the design flow of the flexible heat conducting plate are as follows:
firstly, principle analysis:
the flexible heat conducting plate 1 comprises a rigid terminal and a middle flexible metal belt, and the working principle is as follows: the rigid terminal of one end is connected with the stage body of inertia sub-assembly, and the rigid terminal of the other end is connected with the base, and hot junction rigid terminal 1.1 passes through the contact surface and transmits the heat of inertia sub-assembly 2 to cold junction rigid terminal 1.3 through middle flexible strap 1.2, and the cold junction rigid terminal is connected with base 3, and the heat of will transmitting is passed through the base and is dispersed to the external environment in.
Theoretical analysis of the flexible thermal conductive plate includes analysis of heat transfer characteristics and stiffness characteristics.
The heat transmission characteristic refers to the thermal resistance value of the flexible heat conducting plate and a system structural member, and the smaller the thermal resistance value is, the better the heat conducting performance is. The heat conduction calculation formula of the flexible heat conducting plate is as follows:
heat transferred by two ends of flexible heat conducting plate in efficient heat conduction mode
Coefficient of thermal conductivity with material
Cross sectional area of
And temperature difference
Proportional to the length of the intermediate flexible metal strip
In inverse proportion.
The flexible heat conducting plate is made of red copper with the maximum heat conductivity coefficient (the heat conductivity coefficient at room temperature is 3.98)
). The middle flexible metal strip of heat-conducting plate selects the red copper foil for use, and 0.5mm is selected to its whole thickness, and wherein, the width of every metal strip is 1mm wide, and the radical of metal strip is about 20, and the length of middle flexible metal strip carries out the design of increasing in right amount according to the difference in height of the mounted position of both ends rigid terminal. The processing method of the intermediate flexible metal belt comprises the following steps: selecting a purple copper foil plate with the thickness of 0.5mm, and cutting the part between the two ends into a plurality of metal strips 1.2.1 with the width of 1mm by adopting a laser cutting process.
The rigidity characteristic refers to a deformation value between the flexible plate and a system structural member, and the larger the deformation value is, the lower the rigidity is, and the better the flexibility is. The flexible metal belt is equivalent to a cantilever beam structure, and the cantilever beam linearly displaces under the action of force according to the second clamping theorem
Deformation energy U of cantilever beam and the first borne by the cantilever beam
Force of load
And in
Displacement in the direction of action
In this regard, the stiffness of the S-shaped cantilever can be expressed by the linear elastic theory as follows:
second, design flow
The existing resonance inertial navigation system body is shown in figure 5 and comprises an inertial assembly 2 and a base 3, wherein the inertial assembly and the base are connected through four vibration isolation rubber components 4 uniformly distributed along the circumferential direction, and based on the resonance inertial navigation system body structure, the following factors need to be considered in the design of a flexible heat conducting plate:
1) the platform body 2.1 of the inertia assembly is designed to be a symmetrical structure, see fig. 6, the waist part of the platform body is provided with four flange bosses 2.1.1, and in order to ensure the uniformity of heat transfer and the low rigidity characteristic of the flexible plate, the outer sides of the flange bosses are provided with flexible heat-conducting plates.
2) The flexible heat conducting plate is mainly applied to heat dissipation of a rubber vibration damping system with a heat insulation structure, and not only needs to meet the requirement of heat conducting capacity, but also can meet the rigidity constraint of the vibration damping system. The high-thermal-conductivity and low-rigidity flexible main body section is designed, and the heat transfer resistance between the rigid terminal and the flexible main board is reduced through the idea of an integrated heat conduction path; in order to reduce the heat conduction temperature difference after coupling, red copper with a larger heat conduction coefficient is selected.
3) Rigid terminals with low mass and high thermal conductivity are designed in consideration of the mounting manner of the resonant system components. The rigid terminals are all formed by bending L-shaped copper plates, so that the damage of transverse shearing force to the thin copper foil is reduced.
4) The middle flexible metal belt is made of purple copper foil with the thickness of 0.5mm, and the length and the width of the heat conduction belt are designed in detail according to the requirements of heat consumption, temperature and rigidity of system components. According to the installation distance and the allowable deformation, the height difference of the rigid terminal installation surface of the resonance system structure is 50mm when no external force acts on the resonance system structure, in order to ensure that the rigidity of the flexible heat conduction plate meets the system requirement in the random vibration process, 10% of redundant length is increased, and the length of the flexible metal strip is designed to be 60 mm.
5) The structure form of the flexible metal belt is designed. In heat transfer theory, heat transfer is related to the cross-sectional area of the metal strip. When the inertia assembly and the base need to move relatively, rigid terminals at two ends of a heat conduction plate for connecting the inertia assembly and the base generate relative motion through the middle flexible heat conduction belt, the rigidity of the flexible belt needs to be reduced, the middle flexible metal belt is designed into a structural form that a plurality of metal strips are connected at two ends, and the width of each metal strip is designed to be 1 mm.
6) The flexible metal strip is loaded into the rigid terminal and secured with screws.
7) Experimental verification was performed, see fig. 7. After the flexible heat conducting plate is assembled and molded, longitudinal deformation is calculated, and simulation results show that the maximum deformation of the flexible plate is 24.377mm, which is far larger than the deformation of the system in random vibration by 1 mm.
The method for realizing flexible heat conduction of the hemispherical resonator gyroscope based on the quadrangular frustum configuration structure effectively increases heat transfer between the inertia assembly and the base, and ensures that the deformation of the flexible heat-conducting plate is greater than the random vibration deformation of the system, so that the invention is ensured in the application of the quartz hemispherical resonator gyroscope inertial navigation system. The technology is not limited to be applied to heat conduction of a resonance inertial navigation system, can also be popularized to other strapdown inertial navigation systems, and has a good engineering application prospect for meeting the requirement of system heat dissipation of rubber vibration reduction.
Although the embodiments of the present invention and the accompanying drawings are disclosed for illustrative purposes, those skilled in the art will appreciate that: various substitutions, changes and modifications are possible without departing from the spirit of the invention and the scope of the appended claims, and therefore the scope of the invention is not limited to the disclosure of the embodiments and the accompanying drawings.
Claims (4)
1. A flexible heat conducting plate for enhancing a heat transfer path of a resonance gyro inertial measurement unit is characterized in that: the device is composed of rigid terminals at two ends and a middle flexible metal belt; rigid terminals at two ends are of L-shaped bent plate structures, and the rigid terminals are made of red copper plates; the middle flexible metal belt is formed by connecting a plurality of metal strips which are arranged in parallel at two ends, and the material of the middle flexible metal belt is purple copper foil; the two end parts of the middle flexible metal belt are respectively in surface contact with the rigid terminals at the two ends and are fixedly connected through screws; the rigid terminal at one end is a cold end terminal and is used for being in contact with and fixedly connected with the upper end face of an inertia assembly table body of the resonance inertial navigation system; and the rigid terminal at the other end is a hot end terminal and is used for being in contact with and fixedly connected with the upper end surface of the base of the resonance inertial navigation system.
2. The flexible heat conducting plate for enhancing the heat transfer path of a resonator gyroscope inertial stack of claim 1, wherein: the whole thickness of middle flexible strap is 0.5mm thick, and the width of metal strip is 1mm, and the radical of metal strip is 20.
3. A resonance inertial navigation system adopting the flexible heat conducting plate for enhancing the heat transfer path of the resonance gyro inertial unit in claim 1 or 2, which comprises a resonance inertial navigation system body, wherein the resonance inertial navigation system body comprises an inertia assembly and a base, the inertia assembly and the base are connected through four vibration isolation rubber components uniformly distributed along the circumferential direction, and the resonance inertial navigation system is characterized in that: the four flexible heat-conducting plates are uniformly distributed along the circumference square and are arranged at the outer sides of the vibration isolation rubber components one by one, and the cold end terminals of the four flexible heat-conducting plates are in surface contact with the upper end of the platform body of the inertia assembly and are fixedly connected through screws; the hot end terminals of the four flexible heat conducting plates are in surface contact with the upper end of the base and are fixedly connected through screws; the bottom parts of the hot end terminals of the four flexible heat conducting plates are provided with semicircular grooves for avoiding the vibration isolation rubber components; the height difference between the mounting surfaces of the cold end terminal and the hot end terminal of the flexible heat conducting plate is H, the length of the middle flexible metal strip of the flexible heat conducting plate is L, and L is larger than H.
4. The system of claim 3, wherein the flexible heat conducting plate of the enhanced resonator gyro inertial set heat transfer path is adopted in the system of claim 1 or 2, and the system is characterized in that: the length L of the middle flexible metal strip is 10% greater than the height difference between the mounting surfaces of the cold end terminal and the hot end terminal of the flexible heat conducting plate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210989515.3A CN115077286A (en) | 2022-08-18 | 2022-08-18 | Flexible heat conducting plate for enhancing heat transfer path of resonance gyroscope inertial navigation unit and resonance inertial navigation system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210989515.3A CN115077286A (en) | 2022-08-18 | 2022-08-18 | Flexible heat conducting plate for enhancing heat transfer path of resonance gyroscope inertial navigation unit and resonance inertial navigation system |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109238308A (en) * | 2018-10-31 | 2019-01-18 | 中国船舶重工集团公司第七0七研究所 | A kind of the high-accuracy modal test system and test method of metal tubular resonant gyroscope |
| CN110986940A (en) * | 2019-11-05 | 2020-04-10 | 中国船舶重工集团公司第七一七研究所 | Strapdown hemispherical resonator gyroscope inertial navigation |
| CN112980400A (en) * | 2021-03-04 | 2021-06-18 | 浙江大学 | High-efficient light flexible heat conduction chain based on graphite alkene macroscopic view equipment membrane |
| US20210348504A1 (en) * | 2020-05-11 | 2021-11-11 | Institute Of Geology And Geophysics, Chinese Academy Of Sciences | High-temperature solid state resonant gyroscope and drilling measurement system composed thereby |
| CN114894188A (en) * | 2022-07-14 | 2022-08-12 | 中国船舶重工集团公司第七0七研究所 | Table body for hemispherical resonator gyroscope inertial navigation system and processing method thereof |
-
2022
- 2022-08-18 CN CN202210989515.3A patent/CN115077286A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109238308A (en) * | 2018-10-31 | 2019-01-18 | 中国船舶重工集团公司第七0七研究所 | A kind of the high-accuracy modal test system and test method of metal tubular resonant gyroscope |
| CN110986940A (en) * | 2019-11-05 | 2020-04-10 | 中国船舶重工集团公司第七一七研究所 | Strapdown hemispherical resonator gyroscope inertial navigation |
| US20210348504A1 (en) * | 2020-05-11 | 2021-11-11 | Institute Of Geology And Geophysics, Chinese Academy Of Sciences | High-temperature solid state resonant gyroscope and drilling measurement system composed thereby |
| CN112980400A (en) * | 2021-03-04 | 2021-06-18 | 浙江大学 | High-efficient light flexible heat conduction chain based on graphite alkene macroscopic view equipment membrane |
| CN114894188A (en) * | 2022-07-14 | 2022-08-12 | 中国船舶重工集团公司第七0七研究所 | Table body for hemispherical resonator gyroscope inertial navigation system and processing method thereof |
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