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Bilinear Horizontal Slip Vibration Reduction System for Azimuth Axis Structure of Large Astronomical Telescope

A technology for astronomical telescopes and vibration reduction systems, which can be used in telescopes, instruments, optics, etc., and can solve problems such as damage

Active Publication Date: 2022-04-05
NANJING INST OF ASTRONOMICAL OPTICS & TECH NAT ASTRONOMICAL OBSE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The optics of the telescope (M1 primary mirror, M2 secondary mirror, and spectrometer) are very sensitive pieces of equipment that are likely to be damaged if subjected to significant accelerations

Method used

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  • Bilinear Horizontal Slip Vibration Reduction System for Azimuth Axis Structure of Large Astronomical Telescope
  • Bilinear Horizontal Slip Vibration Reduction System for Azimuth Axis Structure of Large Astronomical Telescope
  • Bilinear Horizontal Slip Vibration Reduction System for Azimuth Axis Structure of Large Astronomical Telescope

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Experimental program
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Effect test

Embodiment 1

[0036] Embodiment 1, large-scale astronomical telescope azimuth axis horizontal slip vibration reduction and isolation system, refer to Figure 1-Figure 4 :

[0037] The isolation system is mounted on the azimuth axis spindle central axis 2 and connects the telescope structure to the base pier 3 . Figure 1 is the azimuth structure. The locking mechanism inside the isolator applies pre-tightening force through the spring, the locking mechanism such as image 3 shown. In the figure, the preload spring is 4, the damper is 5, the tension force is 6, and the compression force is 7. During observation, the telescope structure needs to be firmly fixed on the base and maintain high rigidity to avoid disturbances such as wind and brakes and high resonance frequency for better tracking control. In the event of an earthquake, if the seismic load exceeds a preset value, the prestressed spring starts to move and releases the structure so that the upper telescope structure can move hori...

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Abstract

A bilinear horizontal slip damping system for the azimuth axis structure of a large astronomical telescope, the large astronomical telescope structure is supported by azimuth axis lateral bearings and axial bearings, characterized in that the seismic isolation system is placed on the movable part of the pivot bearing Between the lower plate and the azimuth floor, consists of four bilinear dampers connecting 4 evenly spaced points of the bearings with 4 points of the azimuth floor at 90° from them. Preload is applied to the four bilinear shock absorbers. Axial hydrostatic bearings supporting the azimuth shaft of the telescope structure use sliding contacts on the azimuth shaft track. The invention is used to protect the main structure of the telescope from high-intensity earthquakes. The invention can provide effective isolation in strong earthquake events, and under normal observation conditions, it has high rigidity and can avoid disturbing the pointing accuracy of the telescope.

Description

technical field [0001] The invention relates to a vibration damping device, in particular to a bilinear horizontal sliding vibration damping device with an azimuth axis structure of a large astronomical telescope. [0002] The invention is the research achievement of the National Natural Science Foundation (A11) "Research on the Key Technology of the Active Surface of Large Radio Telescope". Background technique [0003] In recent years, the giant ground-based astronomical optical telescopes with a primary mirror diameter of 20-50m under development in the world mainly include: the American Thirty Meter Telescope (TMT), the 24.5m Large Magellan Telescope (GMT) and the European Southern Astronomy 39m Extremely Large Telescope ( E-ELT). [0004] Most of the existing astronomical observatories in the world with superior observation conditions are located in earthquake-prone areas, for example, Hawaii in North America and Chile in South America, where many large astronomical te...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B23/16
CPCG02B23/16
Inventor 胡守伟
Owner NANJING INST OF ASTRONOMICAL OPTICS & TECH NAT ASTRONOMICAL OBSE