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Satellite-borne damping variable shock absorber

A vibration damping device and variable damping technology, which is applied in the aerospace field, can solve the problems of quantitative control of the damping coefficient and other problems, and achieve the effects of light weight, increased damping coefficient, and reduced bending loss

Active Publication Date: 2012-02-01
BEIJING RES INST OF SPATIAL MECHANICAL & ELECTRICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the piezoelectric ceramic output voltage in this device is a transient voltage, which brings difficulties to quantitatively control the damping coefficient

Method used

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  • Satellite-borne damping variable shock absorber
  • Satellite-borne damping variable shock absorber
  • Satellite-borne damping variable shock absorber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] Such as figure 1 , 2 , 3, the space-borne variable damping device of the present invention includes: a piston assembly, a piston barrel assembly, an elastic support device, a damping generating device and a sensing device.

[0025] The piston assembly includes a support plate 1, a bearing plate 15, a damping piston 19, a limiting plate 22 and a guide rod 12; the supporting plate 1, the bearing plate 15, the damping piston 19, and the limiting plate 22 are coaxial from top to bottom Arranged, fixedly connected by guide rod 12. The damping piston 19 is composed of two damping piston plates, forming a composite damping structure; 4-8 damping holes 18 are distributed on the upper circumference of each damping piston, and the centers of the damping holes 18 are located on the same circumference; coefficient. When the electrorheological flow passes through the damping hole 18 on the piston, extrusion damping is generated, and at the same time, shear damping is generated be...

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PUM

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Abstract

The invention discloses a satellite-borne damping variable shock absorber which comprises a piston assembly, a piston cylinder, an elastic support device, a damping generation device and a sensing device; and the sensing device comprises a fiber bragg grating sensor (2), a photonic crystal fiber (3) and a fiber bragg grating demodulator (4). According to the invention, a fiber bragg grating is modulated to serve as a vibration sensor. Compared with the prior art, the shock absorber provided by the invention has the advantages that the weight is light, the structure is simple, and the flexibility is high, and the real-time feedback of vibration frequency can be realized; and simultaneously, the photonic crystal fiber is adopted as a transmission medium for sensing signals, the bending lossgenerated by optical fiber wiring can be reduced, especially the stretching loss under a vibration motion environment is reduced, and the control accuracy is improved.

Description

technical field [0001] The invention belongs to the field of aerospace technology, in particular to a wide-band variable damping vibration reduction device used for aerospace optical remote sensors. Background technique [0002] Aerospace optical remote sensors are in a harsh mechanical environment during the launch stage, and need to withstand random vibrations with wide frequency bands and large values. From the perspective of the frequency spectrum distribution of vibration, it includes not only low-frequency structural vibrations of a few Hz to hundreds of Hz, but also high-frequency acoustic vibrations of hundreds to thousands of Hz. During the on-orbit working stage of the remote sensor, the disturbance of the flywheel, refrigerator and other moving parts on the star may affect the imaging quality of the optical remote sensor. Ordinary passive vibration isolation measures are difficult to meet the vibration isolation requirements of the launch phase and the on-orbit w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16F9/53F16F13/00
Inventor 郭夏锐白绍竣刘义良
Owner BEIJING RES INST OF SPATIAL MECHANICAL & ELECTRICAL TECH
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