CN115173022A - Parabolic antenna based on folding and unfolding of shape memory composite material control - Google Patents
Parabolic antenna based on folding and unfolding of shape memory composite material control Download PDFInfo
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- CN115173022A CN115173022A CN202210973227.9A CN202210973227A CN115173022A CN 115173022 A CN115173022 A CN 115173022A CN 202210973227 A CN202210973227 A CN 202210973227A CN 115173022 A CN115173022 A CN 115173022A
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- composite material
- shape memory
- memory composite
- parabolic antenna
- unfolding
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- 239000002131 composite material Substances 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 claims abstract description 13
- 230000008569 process Effects 0.000 claims abstract description 13
- 230000007704 transition Effects 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 5
- 230000007246 mechanism Effects 0.000 abstract description 5
- 230000006870 function Effects 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/08—Means for collapsing antennas or parts thereof
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/14—Reflecting surfaces; Equivalent structures
- H01Q15/16—Reflecting surfaces; Equivalent structures curved in two dimensions, e.g. paraboloidal
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Aerials With Secondary Devices (AREA)
- Details Of Aerials (AREA)
Abstract
The parabolic antenna based on the shape memory composite material controls folding and unfolding, changes the rigid state or the flexible state of the shape memory composite material by adjusting the temperature, and further controls the folding and unfolding processes of the parabolic antenna. The parabolic antenna based on the shape memory composite material for controlling folding and unfolding can realize the folding and unfolding functions without a mechanism, has the advantages of simple structure, small mass, low cost, small volume, high folding and unfolding reliability and the like, and provides a new idea for the structural design of a future spacecraft. Therefore, the invention has very good engineering application value.
Description
Technical Field
The invention provides a parabolic antenna for controlling folding and unfolding based on a shape memory composite material, and belongs to the field of space navigation.
Background
Due to the characteristics of light weight, excellent mechanical property and the like, the parabolic antenna is widely concerned and researched in the field of cosmonautic navigation. The parabolic antenna is a rotating parabolic shell structure with a round hole at the bottom and has folding and unfolding functions. The parabolic antenna can realize automatic unfolding of the structure by utilizing elastic strain energy stored during folding; after being unfolded, the locking force required by the unfolded structure can be provided by relying on the self rigidity without additionally arranging a locking device. However, although the parabolic antenna can rapidly realize the unfolding process and has high rigidity after unfolding, the unfolding process needs an auxiliary device, and has a complex structure and low economic benefit. In addition, since the unfolding process is rapid, problems such as shock and vibration may occur. Therefore, in order to solve the problems of the parabolic antenna, the invention provides the parabolic antenna which controls the folding and unfolding based on the shape memory and the composite material, can realize the folding and unfolding functions without an auxiliary device, and has the advantages of simple structure, small mass, low cost, small volume, high reliability of folding and unfolding and the like. Therefore, the invention has very good engineering application value.
Disclosure of Invention
The invention aims to provide a parabolic antenna for controlling folding and unfolding based on a shape memory composite material, and the technical problem that the traditional parabolic antenna needs a mechanism to realize the folding and unfolding functions is solved.
The technical scheme adopted by the invention is as follows:
the parabolic antenna based on the shape memory composite material for controlling folding and unfolding is different from the traditional parabolic antenna which needs a mechanism to control folding and unfolding. The parabolic antenna based on the shape memory composite material for controlling folding and unfolding consists of the parabolic antenna and a shape memory composite material thin layer. The rotating paraboloid-shaped thin shell reflecting surface is made of composite materials, a circular hole is formed in the bottom of the rotating paraboloid-shaped thin shell reflecting surface, n composite material ribs are arranged along the direction of a reflecting surface bus, and the shape memory composite material thin layer is glued to the bottom and the top along the circumferential direction of the reflecting surface.
When the parabolic antenna needs to be folded, the shape memory composite material thin layer is heated to a temperature higher than the transition temperature, the shape memory composite material thin layer is changed from a rigid state to a flexible state, external force is applied to fold the parabolic antenna into an approximately fan-shaped fold structure, the shape memory composite material is cooled in the folded state, the shape memory composite material thin layer is changed from the flexible state to the rigid state, and even if the external force is removed, the parabolic antenna can keep the deformed state, so that the self-locking effect can be realized. When the parabolic antenna needs to be unfolded, the shape memory composite material thin layer is heated to a temperature higher than the transition temperature, the shape memory composite material thin layer is changed from a rigid state to a flexible state, the parabolic antenna completes the unfolding deformation process by utilizing strain energy stored during folding deformation and finally recovers to the initial configuration, and the shape memory composite material plays a self-unlocking role in the unfolding process. Compared with the traditional parabolic antenna, the invention has the advantages that:
1. the parabolic antenna based on the shape memory composite material for controlling folding and unfolding has the advantages of stable unfolding process, high recovery precision, large rigidity after unfolding, no need of a mechanism for controlling the folding and unfolding process, effective solving of the mechanism blockage problem and providing a new idea for the structural design of a future spacecraft.
2. According to the parabolic antenna for controlling folding and unfolding based on the shape memory composite material, the rigid state and the flexible state of the shape memory composite material are controlled by adjusting the temperature, the shape memory composite material is in the rigid state before unfolding, and the self-unfolding process can be realized only by heating the shape memory composite material to a temperature higher than the transition temperature when the shape memory composite material needs to be unfolded.
Drawings
Figure 1 is a schematic view of the initial state of a parabolic aerial with a thin layer of shape memory composite material.
Figure 2 is a schematic illustration of the parabolic antenna sections folded with a thin layer of shape memory composite.
Figure 3 is a schematic view of a parabolic aerial with a thin layer of shape memory composite material fully folded.
In FIG. 1: 1. parabolic antenna reflector, 2. Shape memory composite thin layer, 3. Composite rib.
Detailed Description
The invention is further described below with reference to the drawings and the examples.
The parabolic antenna based on the shape memory composite material for controlling folding and unfolding is composed of the parabolic antenna and a shape memory composite material thin layer. The thin shell reflecting surface 1 of the parabolic antenna is made of composite materials, a circular hole is formed in the bottom of the thin shell reflecting surface, n composite material ribs 3 are arranged along the bus direction of the reflecting surface, and a shape memory composite material thin layer 2 is bonded to the bottom and the top along the circumferential direction of the reflecting surface (as shown in figure 1).
When the parabolic antenna needs to be folded, the shape memory composite material thin layer 2 is heated to a temperature higher than the transition temperature, the shape memory composite material thin layer 2 is changed from a rigid state to a flexible state, external force is applied to bend and fold the parabolic antenna along the composite material ribs 3 to form an approximately fan-shaped fold-shaped structure (shown in figure 2), the shape memory composite material is cooled in the folded state, the shape memory composite material thin layer 2 is changed from the flexible state to the rigid state, and even if constraint is removed, the parabolic antenna can be kept in the deformed state, namely, the self-locking effect can be achieved (shown in figure 3). When the parabolic antenna needs to be unfolded, the shape memory composite material thin layer 2 is heated to a temperature higher than the transition temperature, the shape memory composite material thin layer 2 is changed from a rigid state to a flexible state, the parabolic antenna completes the unfolding deformation process by using the stored strain energy and finally recovers to the initial configuration, and the shape memory composite material plays a self-unlocking role in the unfolding process.
Claims (1)
1. A parabolic antenna based on shape memory composite control is drawn in and is expanded which characterized in that: the antenna is composed of a rotary paraboloid antenna and a shape memory composite material thin layer; the reflecting surface of the rotating paraboloid-shaped thin-shell antenna is made of composite materials, a circular hole is formed in the bottom of the reflecting surface, n composite material ribs are arranged along the bus direction of the reflecting surface, and the shape memory composite material thin layer is glued to the bottom and the top along the circumferential direction of the reflecting surface; when the parabolic antenna needs to be folded, the shape memory composite material thin layer is heated to a temperature higher than the transition temperature, the shape memory composite material thin layer is changed from a rigid state to a flexible state, external force is applied to bend and fold the parabolic antenna along the ribs, the shape memory composite material is cooled in the folded state, the shape memory composite material thin layer is changed from the flexible state to the rigid state, and even if the external force is removed, the parabolic antenna can keep the deformed state, so that the self-locking effect can be realized; when the parabolic antenna needs to be unfolded, the shape memory composite material thin layer is heated to a temperature higher than the transition temperature, the shape memory composite material thin layer is changed from a rigid state to a flexible state, the parabolic antenna completes the unfolding deformation process by utilizing strain energy stored during folding deformation and finally recovers to the initial configuration, and the shape memory composite material plays a self-unlocking role in the unfolding process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210973227.9A CN115173022A (en) | 2022-08-15 | 2022-08-15 | Parabolic antenna based on folding and unfolding of shape memory composite material control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210973227.9A CN115173022A (en) | 2022-08-15 | 2022-08-15 | Parabolic antenna based on folding and unfolding of shape memory composite material control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115173022A true CN115173022A (en) | 2022-10-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210973227.9A Withdrawn CN115173022A (en) | 2022-08-15 | 2022-08-15 | Parabolic antenna based on folding and unfolding of shape memory composite material control |
Country Status (1)
| Country | Link |
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| CN (1) | CN115173022A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116247410A (en) * | 2023-05-10 | 2023-06-09 | 西北工业大学 | Repeatable sector-shaped unfolding mechanism based on shape memory alloy driving |
-
2022
- 2022-08-15 CN CN202210973227.9A patent/CN115173022A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116247410A (en) * | 2023-05-10 | 2023-06-09 | 西北工业大学 | Repeatable sector-shaped unfolding mechanism based on shape memory alloy driving |
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20221011 |
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| WW01 | Invention patent application withdrawn after publication |