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Solar sail driven to be unfolded by multi-steady-state curved beam intelligently

A multi-stable, curved beam technology, applied in the field of solar sails, can solve the problems of uncontrollable intermediate process, high energy consumption, poor stability, etc., and achieve the effect of zero Poisson's ratio, strong reliability and strong stability

Active Publication Date: 2019-10-25
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Mechanically driven solar sails have the problems of poor reliability, large folding volume, heavy weight, high energy consumption, and low simultaneous deployment performance, while inflatable solar sails have poor shape retention, heavy inflatable equipment, poor stability, and uncontrollable intermediate processes

Method used

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  • Solar sail driven to be unfolded by multi-steady-state curved beam intelligently
  • Solar sail driven to be unfolded by multi-steady-state curved beam intelligently
  • Solar sail driven to be unfolded by multi-steady-state curved beam intelligently

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specific Embodiment approach 1

[0027] Specific implementation mode one: as Figure 1 to Figure 15 As shown, the present invention discloses a solar sail intelligently driven by a multi-stable curved beam, including a support shaft 12, an upper compression device 15, a lower compression device 16, four sail surfaces 14, and four extension arms 11. The four extension arms 11 are arranged in a cross shape with the support shaft 12 as the center, and the inner end of each extension arm 11 is hinged in the middle of the side wall of the support shaft 12. The extension arms 11 include several composite negative stiffness unit cells 1, the The composite negative stiffness unit cell 1 includes a curved beam structure 1-1 and three support structures 1-2, the curved beam structure 1-1 adopts shape memory polymer containing reinforced fibers, and the support structure 1-2 adopts nylon , the three support structures 1-2 are vertically fixed to the middle and both ends of the curved beam structure 1-1 respectively, and...

specific Embodiment approach 2

[0028] Specific implementation mode two: as figure 1 , 5 , 12, this embodiment is a further description of the specific embodiment 1, the plurality of composite negative stiffness unit cells 1 are in the unfolded state and are higher than the glass transition of the material of the curved beam structure 1-1 In the case of high temperature, it is compressed under the drive of external load to produce bending deformation for shaping. After the shape is shaped, it is naturally cooled and fixed to form the extension arm 11. When all the curved beam structures 1-1 of the extension arm 11 are heated to the same temperature at the same time Temperature, all the curved beam structures 1-1 return to the expanded state to release the prestress to make the extension arm 11 axially extend, the axial extension of the upper compression device 15 and the lower compression device 16 is the same as the axial extension of the extension arm 11.

specific Embodiment approach 3

[0029] Specific implementation mode three: as figure 1 As shown, this embodiment is a further description of the second embodiment. The two sides of the curved beam structure 1-1 use polyimide adhesive to paste the electric heating sheet on the initially expanded state containing reinforcing fibers. The inner surface of the shape-memory polymer is controlled by a temperature controller to control the temperature of the electric heating sheet, thereby changing the temperature of the curved beam structure 1-1.

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Abstract

The invention discloses a solar sail driven to be unfolded by a multi-steady-state curved beam intelligently, and relates to the solar sail. Four extending arms are hinged in a cross-shaped arrangement mode by taking a supporting shaft as the center, four composite negative stiffness single-cell combinations are fixed into a composite negative stiffness honeycomb structure, the eight composite type negative stiffness honeycomb structures are used for fixedly defining a regular octagon to form a stretching arm single body, a plurality of stretching arm single bodies fixedly form a stretching arm along the axial direction, four sail surfaces are arranged between the four stretching arms, the right-angle vertexes of the sail surfaces are fixedly connected with the side wall of the supportingshaft, the two acute vertexes of the sail surfaces are fixedly connected with the outer ends of the corresponding stretching arms, an upper compression device and a lower compression device are correspondingly fixed at the upper end and the lower end of the supporting shaft, and the stretching arms, the upper compression device and the lower compression device are axially stretched through temperature control. Two-stage intelligent unfolding can be realized through temperature control, the shape memory function is achieved, multiple stable states can be realized, the reliability is high, the shape maintenance is good, and the stability is high.

Description

technical field [0001] The invention relates to a solar sail, in particular to a solar sail intelligently driven by multi-stable curved beams. Background technique [0002] At present, in frontier fields such as satellite communication and space exploration, the demand for solar sail spacecraft is more and more urgent. As a spacecraft that uses the light pressure of sunlight for space navigation, the thrust of the spacecraft is very small It cannot take off from the ground, but in space where there is no air resistance, this kind of propulsion resource is endless, and the sustaining force of propulsion only depends on the life of the solar sail film and the brake and the distance from the light source. A solar sail with a sail area provides a certain amount of acceleration. [0003] Mechanically driven solar sails have the problems of poor reliability, large folding volume, heavy weight, high energy consumption, and low simultaneous deployment performance, while inflatable ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64G1/44B64G1/22
CPCB64G1/44B64G1/22
Inventor 王长国谭惠丰张季陶强夏振猛
Owner HARBIN INST OF TECH
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