CN106564621B - It is a kind of to realize the X-type section boom for collapsing expansion function - Google Patents
It is a kind of to realize the X-type section boom for collapsing expansion function Download PDFInfo
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- CN106564621B CN106564621B CN201610953661.5A CN201610953661A CN106564621B CN 106564621 B CN106564621 B CN 106564621B CN 201610953661 A CN201610953661 A CN 201610953661A CN 106564621 B CN106564621 B CN 106564621B
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- section
- boom
- type section
- collapsing
- expansion
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- 239000013013 elastic material Substances 0.000 claims abstract description 7
- 238000005452 bending Methods 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 5
- 229910000906 Bronze Inorganic materials 0.000 claims description 3
- 239000010974 bronze Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims description 2
- 239000000835 fiber Substances 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 230000006872 improvement Effects 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 5
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64G—COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
- B64G1/00—Cosmonautic vehicles
- B64G1/22—Parts of, or equipment specially adapted for fitting in or to, cosmonautic vehicles
- B64G1/222—Parts of, or equipment specially adapted for fitting in or to, cosmonautic vehicles for deploying structures between a stowed and deployed state
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- Engineering & Computer Science (AREA)
- Remote Sensing (AREA)
- Aviation & Aerospace Engineering (AREA)
- Jib Cranes (AREA)
Abstract
The present invention provides a kind of X-type section boom for realizing gathering expansion function, X-type section boom (4) is substantially in X-shaped structure with its vertical axial section in the deployed state, and four ends of the X-shaped structure are bent to structure centre；X-type section boom (4) so that expansion is in flat structure outward for four ends by being collapsed after curling；The X-type section boom (4) is made of elastic material.There is the X-type section boom of the present invention cross sectional moment of inertia than the sections STEM and CTM bigger, the flexual center in section to be overlapped with the centre of form, are wrapped in after can flattening and realize high gathering rate on spool, and boom has certain rigidity after expansion.
Description
Technical field
The application belongs to spacecraft deployable mechanism design field, and in particular to a kind of to realize the X-type for collapsing expansion function
Section boom.
Background technology
Unfolding mechanism was just paid attention to and is applied in the early stage of development of spacecraft technology, wherein one-dimensional linear type expansion
Structure composition, the expansion process of mechanism are relatively easy, are always the unfolding mechanism being most widely used.It is examined from expanded form
Consider, one-dimensional straight line expansion boom mechanism can be divided into：Threadiness, thin-walled tubular, telescopic, disk compression bar formula, truss-like and inflatable etc.
Several types.Wherein thin-walled tubular extending arm be mainly characterized by it is extensible, can wind gathering on spool, during expansion
Become circular tube shaped from flat；It has simple expansion principle, lightweight, storage rate height, high reliability, is commonly applied to list
The expansion support system etc. of pole and dipole antenna, gravity gradient stabilization bar, the support arm of sensor or camera, solar sail.
Currently, there are mainly three types of the cross section geometric forms of wound form thin-walled tubular boom, Storable Tubular
Extendable Member (STEM), Collapsible Tubular Mast (CTM) and Triangular Rollable
And Collapsible (TRAC) Boom, as shown in (a), (b) and (c) in Fig. 2.These three sections are in cross sectional moment of inertia phase
With in the case of, the gathering height longest of the booms of STEM section forms under rounding state, CTM takes second place in section, the sections TRAC
The gathering height of boom is most short.On the other hand, when with same gathering height, the sections TRAC have larger section used
Property square with collapse the ratio between height, but its section thickness is also most wide, and diameter is longer after gathering, and section flexual center with the centre of form not
It overlaps, when around symmetry axis unstability, while bending along with torsion, easily forms Flexural-Torsional Coupling Vibration.
Invention content
The purpose of the present invention is being, the boom section of design in the case where section thickness increase is smaller, have than
The ratio between the cross sectional moment of inertia of the sections STEM and CTM bigger and gathering height, the flexual center in section is overlapped with the centre of form, and boom can flatten
It is wrapped in afterwards and realizes high gathering rate on spool, and boom has certain rigidity after expansion.
To achieve the above object, a kind of X-type section boom for realizing gathering expansion function provided by the invention, the X-type
Section boom is substantially in X-shaped structure with its vertical axial section in the deployed state, four ends of the X-shaped structure to
Structure centre is bent；X-type section boom so that expansion is in flat knot outward for four ends by being collapsed after curling
Structure；The X-type section boom is made of elastic material.
As a further improvement of the above technical scheme, including two strip structures symmetrically connected, the strip structure
Including planar section and the arc surface section for being symmetrically disposed on planar section both sides；Two strip structures are in an axial direction by corresponding two planes
Section links together.
As a further improvement of the above technical scheme, the contact surface between two planar sections is using splicing or weldering
The form of connecing links together.
As a further improvement of the above technical scheme, the bending stress of the arc surface section is adopted in X-type section boom
Within the scope of the yield stress of elastic material.
As a further improvement of the above technical scheme, the expanded angle of the arc surface section is between 80 °~90 °.
As a further improvement of the above technical scheme, the elastic material is that beryllium-bronze, stainless steel or carbon fiber are multiple
Condensation material.
A kind of the advantages of realizing the X-type section boom for collapsing expansion function of the present invention, is：
There is X-type section proposed by the present invention boom disymmetry axis, flexual center to be overlapped with the centre of form, be not susceptible to crankling vibration change
Shape.In identical gathering height, the cross sectional moment of inertia with bigger, the cross sectional moment of inertia sections ratio CTM and the sections STEM have
Larger raising, X-axis cross sectional moment of inertia Ix and the sections Y-axis cross sectional moment of inertia Iy ratio CTM have increased separately 77% and 35%, compare STEM
Section increases 30 times and 6.7 times.In general, the performance of X-type section boom of the invention is between CTM and TRAC
A kind of trade-off optimization scheme, it both has disymmetry axis, and it is used can also to improve section in the case where collapsing thickness and increasing less
Property square.
Description of the drawings
Fig. 1 is that a kind of in the embodiment of the present invention realizes the X-type section boom for collapsing expansion function from rounding state to exhibition
The schematic diagram of open state stretching, extension.
The rounding state and the structural schematic diagram under unfolded state that Fig. 2 is different cross section boom.
Fig. 3 is the finite element model of the X-type section boom of the present invention.
Fig. 4 is the schematic cross-section of the X-type section boom of the present invention.
Attached drawing identifies：
1, reel 2, planar section
3, arc surface section 4, X-type section boom
5, the finite element model 6 of X-type section boom, finite element model free end
7, finite element model fixing end
Specific implementation mode
With reference to the accompanying drawings and examples to it is of the present invention it is a kind of realize collapse expansion function X-type section boom into
Row is described in detail.
The present invention proposes a kind of X-type section --- X Type Extendable Member for realizing and collapsing expansion function
(abbreviation XTEM) boom, as shown in Figure 1, X-type section boom 4 is in the deployed state, substantially with its vertical axial section
In X-shaped structure, four ends of the X-shaped structure are bent to structure centre；X-type section boom 4 by being collapsed after curling,
And so that expansion is in flat structure outward for four ends；The X-type section boom 4 is made of elastic material.
X-shaped section boom 4 based on above structure, under rounding state, four ends of the boom, which can flatten, to be become
Flat, rigidity is very low at this time, can be thus wrapped on reel 1；In the deployed state, it is stretched out after boom expansion,
Boom section after stretching is in X-type, has certain rigidity at this time.
As shown in Figure 1, in the present embodiment, the X-shaped section boom 4 includes two strip structures symmetrically connected,
Each strip structure all includes two arc surface sections 3 of the small planar section 2 and both sides in one, intermediate position.The two arc surface sections
3 are symmetrically disposed on the both ends of planar section 2, and are in integral structure.
The X-type section boom 4 needs to select the material with high resiliency and high yield strength, it is preferable that selection
Any one material in beryllium-bronze, stainless steel or carbon fibre composite is made.
For the section inertia in the sections XTEM and existing section STEM, CTM and TRAC of X-type section boom 4
The size of square, four kinds of section form depth of sections after gathering of setting are consistent, are 24.6mm, maximum allowable strain is set as
1.5%, four kinds of section form booms are designed on this basis, and specific size is as shown in Fig. 2, various forms of sections have not
The bending radius of same thickness, STEM is minimum, and section thickness is also minimum, and the section thickness of CTM takes second place, and TRAC has maximum section
Face thickness, and XTEM section thicknesses proposed by the present invention are between CTM and TRAC.
As shown in figure 3, the boom finite element model for establishing above-mentioned four kinds of sections solves cross sectional moment of inertia, four kinds of sections are stretched
Pole length is set as 500mm.Each boom is all made of cantilever beam form, and one end is fixed, and one end is free.It is stretched using shell unit is discrete
Bar establishes the finite element model 5 of X-type section boom.Analysis type is small deformation static analysis.In finite element model, constraint
All degree of freedom of node on 7 section of finite element model fixing end, all nodes in 6 section of finite element model free end are fixed
A rigid section is formed together.The applied force load at the cross-section centroid of free end, direction are respectively two axial directions.By having
Finite element analysis obtains the maximum distortion of four kinds of section form booms.The calculating of cross sectional moment of inertia is become using cantilever beam free end stress
Shape formula：
It is available by formula (1)：
In formula (1), formula (2), Δ is maximum distortion, and F is external force, and L is boom length, and E is elasticity modulus, and I is used for section
Property square.
The design size of four kinds of different form section booms is described in table 1 and calculates the cross sectional moment of inertia obtained.It can
To find out in the case where similarly collapsing height, the moment of inertia in the sections STEM is minimum.The bending radius in the sections TRAC is maximum, section thickness
Also maximum, therefore there is maximum cross sectional moment of inertia, but its section thickness also increases more, and thickness is approximately the sections STEM
4 times, be 2.9 times of the sections CTM.And the thickness in the sections XTEM proposed by the present invention is 2 times of the sections STEM, is the sections CTM
1.4 times, and the cross sectional moment of inertia sections ratio CTM and the sections STEM are improved a lot, X-axis cross sectional moment of inertia Ix and Y-axis section inertia
Square Iy increases 77% and 35% than the section CTM respectively, and 30 times and 6.7 times are increased than the section STEM.Although open-type section
Torsion stiffness it is not high, but for boom, the ratio between big length diameter determines the first-order modal corresponding to its fundamental frequency
It is mode of flexural vibration, therefore by improving cross sectional moment of inertia to improve bending stiffness be more main target.
The geometric parameter and cross sectional moment of inertia of 1 different cross section form of table
As shown in figure 4, two strip structures of X-type section boom link together at the planar section 2 described in middle part, tool
Body connection method can be any connection method being currently known, as long as can guarantee that two-part bonding strength can bear boom
Shear stress, it is preferable that using be glued or welding in a kind of connection type.
Thickness after the planar section 2 links together is t, i.e., the thickness of each strip structure is t/2, described
The radius R of four 3 outer surfaces of arc surface section is consistent, is R, at this time there are two the sections the XTEM tools of the X-type section boom 4
Symmetry axis, i.e., symmetrical along X-axis and Y-axis, flexual center is overlapped with the centre of form, in its axial compression or transverse bending vibration, it is not easy to
Crankling vibration buckling occurs.The bending stress of boom is：To ensure bending stress σ bending in selected materials in design
It takes in the range of stress.In order to maximize the bending stiffness of Y-axis, expanded angle θ takes between 80 °~90 °.
It should be noted last that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting.Although ginseng
It is described the invention in detail according to embodiment, it will be understood by those of ordinary skill in the art that, to the technical side of the present invention
Case is modified or replaced equivalently, and without departure from the spirit and scope of technical solution of the present invention, should all be covered in the present invention
Right in.
Claims (6)
1. a kind of realizing the X-type section boom for collapsing expansion function, which is characterized in that X-type section boom (4) is in expansion shape
Substantially it is in X-shaped structure with its vertical axial section under state, four ends of the X-shaped structure are bent to structure centre；It is described
X-type section boom (4) so that expansion is in flat structure outward for four ends by being collapsed after curling；The X-type section
Boom (4) is made of elastic material.
2. according to claim 1 realize the X-type section boom for collapsing expansion function, which is characterized in that right including two
Claim the strip structure of connection, the strip structure includes planar section (2) and the arc surface section for being symmetrically disposed on planar section (2) both sides
(3)；Two strip structures in an axial direction link together corresponding two planar sections (2).
3. according to claim 2 realize the X-type section boom for collapsing expansion function, which is characterized in that described two
Contact surface between planar section (2) is linked together using splicing or welding form.
4. according to claim 2 realize the X-type section boom for collapsing expansion function, which is characterized in that the arc surface
The bending stress of section (3) is within the scope of the yield stress of elastic material used by X-type section boom (4).
5. according to claim 2 realize the X-type section boom for collapsing expansion function, which is characterized in that the arc surface
The expanded angle of section (3) is between 80 °~90 °.
6. according to claim 1 realize the X-type section boom for collapsing expansion function, which is characterized in that the elasticity
Material is beryllium-bronze, stainless steel or carbon fibre composite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610953661.5A CN106564621B (en) | 2016-11-03 | 2016-11-03 | It is a kind of to realize the X-type section boom for collapsing expansion function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610953661.5A CN106564621B (en) | 2016-11-03 | 2016-11-03 | It is a kind of to realize the X-type section boom for collapsing expansion function |
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| Publication Number | Publication Date |
|---|---|
| CN106564621A CN106564621A (en) | 2017-04-19 |
| CN106564621B true CN106564621B (en) | 2018-10-02 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108583937B (en) * | 2018-04-19 | 2019-12-24 | 中国科学院国家空间科学中心 | Compression release device of winding type thin-wall tubular extension rod |
| CN108974391B (en) * | 2018-07-18 | 2021-03-26 | 安徽大学 | Double-roller herringbone rod cross unfolding mechanism |
| CN108910089B (en) * | 2018-07-18 | 2020-07-14 | 安徽大学 | Single-motor-driven four-roller humanoid-shaped rod unfolding mechanism |
| CN110550237B (en) * | 2019-10-12 | 2022-09-23 | 上海宇航系统工程研究所 | Unfolding control device of thin-wall extending arm |
| CN110745257B (en) * | 2019-10-12 | 2023-09-15 | 上海宇航系统工程研究所 | Foldable supporting structure |
| CN110979742B (en) * | 2019-11-29 | 2021-12-07 | 北京卫星制造厂有限公司 | High-expansion-ratio unfolding mechanism suitable for space environment |
| CN111547273B (en) * | 2020-05-14 | 2021-05-25 | 中国人民解放军国防科技大学 | Thin film spacecraft |
| CN113386977B (en) * | 2021-05-24 | 2022-10-28 | 北京科技大学 | Laminated elastic space stretching arm for maintaining electromagnetic wave orthogonality in deformation process |
| CN113415440B (en) * | 2021-07-20 | 2022-06-17 | 哈尔滨工业大学 | Quick expansion supporting device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3528543A (en) * | 1968-08-27 | 1970-09-15 | Eli I Robinsky | Corrugated roll-up structure |
| US7895795B1 (en) * | 2007-10-22 | 2011-03-01 | The United States Of America As Represented By The Secretary Of The Air Force | Triangular rollable and collapsible boom |
| CN201309598Y (en) * | 2008-12-18 | 2009-09-16 | 北京航空航天大学 | Coiling type Y-shaped cross frame space extending arm without articulation |
| FR2997385B1 (en) * | 2012-10-26 | 2014-11-28 | Thales Sa | MOTORIZATION SYSTEM FOR ARTICULATION WITH FLEXIBLE BEARING RUNWAYS |
| CN103712052B (en) * | 2013-12-31 | 2016-03-30 | 吉首大学 | A kind of rollable thin-walled supporting structure |
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| CN106564621A (en) | 2017-04-19 |
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Granted publication date: 20181002 Termination date: 20211103 |