Reflection surface vibration detecting device for umbrella antenna and method

A vibration detection and reflective surface technology, applied in measurement devices, vibration testing, and testing of machine/structural components, etc., can solve problems affecting satellite and ground communication, loss of satellite life, low-frequency vibration, etc., to achieve uniform image contrast, The effect of fast dynamic response and strong anti-interference ability

Pending Publication Date: 2019-08-06
SOUTH CHINA UNIV OF TECH
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  • Application Information

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Problems solved by technology

Under the action of energy such as cosmic wind and solar heat load, the reflective surface of this large-diameter antenna is prone to long-term low-frequency vibrati

Method used

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  • Reflection surface vibration detecting device for umbrella antenna and method
  • Reflection surface vibration detecting device for umbrella antenna and method
  • Reflection surface vibration detecting device for umbrella antenna and method

Examples

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Example Embodiment

[0035] Example

[0036] Such as Figure 1-Figure 4 As shown, a reflection surface vibration detection device of an umbrella antenna, the device part includes an antenna body part, a vibration detection part and a drive excitation part.

[0037] The main part of the antenna includes a rigid satellite antenna and a flexible satellite antenna. The rigid satellite antenna and the flexible satellite antenna are symmetrically arranged on both sides of the experimental platform;

[0038] The rigid satellite antenna is composed of seven basic units. The seven basic units have the same structure. They all include a rigid support truss 9 and a first flexible board. One basic unit is located in the middle position, and the other six basic units surround the basic unit in the middle position. Around, the angle between the plane where the flexible board of each basic unit is located is 10 degrees, so the overall antenna structure is concave, forming an umbrella shape, and the overall antenna str...

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Abstract

The invention discloses a reflection surface vibration detecting device for an umbrella antenna and a method. The device comprises an antenna body part, a vibration detection part and a driving excitation part; the antenna body part comprises a rigid satellite antenna and a flexible satellite antenna, wherein the rigid satellite antenna and the flexible satellite antenna are symmetrically arrangedat two sides of an experiment table; a vibration exciter is directly connected with the reflection surface of the antenna so as to excite the vibration of the reflection surface; a projection point on the surface of a flexible plate is recognized through a laser-projection non-contact type visual detection mode; the vibration information of the projection point is collected; a laser displacementsensor is used in an assisted manner to synchronously detect the back surface of the flexible plate; the composite vibration information of two paths of detection modes is obtained; the vibration information of the two experimental objects is compared with each other, and the vibration difference of the two experimental objects is analyzed; and a visualization technology is introduced to display the dynamic forms of the two experimental objects on a display, so that experimental results are more direct.

Description

technical field [0001] The invention relates to the field of vibration detection of a space flexible extension structure, in particular to a vibration detection device and method for a reflective surface of an umbrella antenna. Background technique [0002] The development of spacecraft has become diverse with the advancement of science and technology, such as solar sails, solar thin films, communication satellites, etc.; these structures are basically inseparable from flexible and expandable structures. The flexible and deployable structure can realize the deployment of large-diameter antennas in space, and it can be folded into a small size on the ground and carried on the rocket. The ensuing problem is that the flexible and deployable structure is light in weight and small in damping, and it is easy to be excited to vibrate in space, causing system instability, especially for spacecraft used for measurement or communication purposes. Decreased accuracy or unstable commun...

Claims

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Application Information

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IPC IPC(8): G01M7/02
CPCG01M7/022G01M7/025G01M7/027
Inventor 邱志成吴郭烽
Owner SOUTH CHINA UNIV OF TECH
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