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Dynamic stiffness on-orbit monitoring device and method for space inflatable deployable supporting structure

A supporting structure and monitoring device technology, applied in the field of aerospace, can solve problems such as inability to use space for on-orbit testing, complex volume and power consumption systems, lack of real-time dynamic stiffness monitoring capabilities, etc., to achieve load space saving and effective layout. order, the effect of low power

Active Publication Date: 2021-11-05
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Due to volume and power consumption limitations and complex systems, these devices and methods cannot be used for space on-orbit testing, and they do not have continuous real-time dynamic stiffness monitoring capabilities

Method used

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  • Dynamic stiffness on-orbit monitoring device and method for space inflatable deployable supporting structure
  • Dynamic stiffness on-orbit monitoring device and method for space inflatable deployable supporting structure
  • Dynamic stiffness on-orbit monitoring device and method for space inflatable deployable supporting structure

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specific Embodiment

[0066] Such as figure 1 As shown, the structure of the dynamic stiffness on-orbit monitoring device includes a top cover, a circuit board, and a box. Wherein, the circuit board and the box body, and the top cover and the box body are tightly connected together by four M3 bolts respectively. After the connection is completed, the size of the dynamic stiffness on-orbit monitoring device is 150mm×150mm×30mm, and the mass is 350g, occupying very little payload space of the spacecraft. The bottom surface of the dynamic stiffness on-orbit monitoring device is a plane with M3 bolt holes at the four corners, which has good operability, and it can be tightly connected to the spacecraft wall plate with only 4 M3 bolts, which is very easy for spacecraft integration .

[0067] The circuit board in the dynamic stiffness on-orbit monitoring device adopts a modular design, and the layout of the modules is orderly and compact, which greatly reduces the size of the circuit board, optimizes t...

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Abstract

The invention discloses a dynamic stiffness on-orbit monitoring device and method for a space inflatable deployable supporting structure. The dynamic stiffness on-orbit monitoring device comprises a top cover, a circuit board and a box body, the circuit board is arranged in the box body; the top cover is mounted on the top surface of the box body to seal the box body; the circuit board comprises a signal generation module, a signal acquisition module, a microprocessor module, a serial port communication module, a data storage module and a power management module; the microprocessor module controls a signal sending module to generate a sine frequency sweeping signal with a specified frequency and enables the signal acquisition module to perform data acquisition; and after the signal acquisition module finishes acquisition, the microprocessor module performs short-time Fourier transform on an acquired excitation signal and a response signal, obtains dynamic stiffness data of the inflatable expandable support structure by solving the ratio of the excitation signal to the response signal, and transmits the dynamic stiffness data to an SD card for storage. The device provided by the invention has the characteristics of miniaturization, modularization and low power consumption, saves the load space of a spacecraft, and saves energy.

Description

technical field [0001] The invention belongs to the field of aerospace technology, and in particular relates to an on-orbit monitoring device and method for dynamic stiffness. Background technique [0002] Space inflatable expandable structures have significant advantages such as small folding volume, light weight, easy unfolding, easy storage, and low cost, and have broad application prospects in aerospace engineering. The space inflatable expandable structure is generally composed of a membrane and a support structure, wherein the support structure mainly includes an inflatable expandable support rod and a support ring. In the space large-scale inflatable deployment antenna system, the inflatable expandable support rod and the support ring are used to expand and maintain the reflector in the antenna system; in the solar sail, the inflatable expandable support rod is used to expand and support the sail surface. The function of the inflatable expandable support structure is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64G3/00B64G1/22G01M5/00G01M13/00
CPCB64G3/00B64G1/222G01M5/0075G01M13/00
Inventor 徐超李鹏飞颜津玮
Owner NORTHWESTERN POLYTECHNICAL UNIV
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