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Adaptive supporting method for large-diameter reflector

A large-aperture mirror and self-adaptive technology, applied in installation, optics, instruments, etc., can solve the problems that it is difficult to ensure the mirror surface accuracy and assembly process requirements at the same time, and achieve the effect of improving flexibility

Active Publication Date: 2019-06-25
HANGZHOU DIANZI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide an adaptive support method for large-diameter reflectors in order to solve the problem that it is difficult to ensure the surface accuracy and assembly process requirements of the reflector under the working conditions of self-weight and temperature changes in the existing technology

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Embodiment Construction

[0033] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0034] An adaptive support method for a large-aperture mirror, specifically as follows:

[0035] Step 1. Construct the memory alloy drive module, and optimize the calculation of the diameter d and the length L of the memory alloy wire; wherein, the memory alloy drive module is composed of a memory alloy wire 3 and a spring 4 set outside the memory alloy wire; optimize the calculation of the memory alloy wire The specific process of the diameter d and the length L is as follows: first, set the external load as W (in this embodiment, W=15N), and the spring preload F sprL It is set to be in the same direction as the external load W; then, under the combined force of the external load W and the spring preload, the critical stress of the memory alloy wire at the end of the martensitic transformation is σ 0 (in this embodiment σ 0 =200Mpa), and memory alloy ...

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Abstract

The invention discloses an adaptive supporting method for a large-diameter reflector. An existing reflector supporting method is difficult to ensure the surface form accuracy and assembly requirementsof a reflector under conditions such as self weight and temperature change. According to the adaptive supporting method for the large-diameter reflector of the invention, memory alloy driving modulesare uniformly distributed in a flexible supporting module in a six-point manner; the flexible supporting module is finely adjusted; three or more flexible supporting units are uniformly distributed along the circumferential direction of the reflector so as to be used for supporting the reflector. On the basis of the driving characteristic of memory alloy, the heating of the memory alloy is controlled through a central signal processor, and therefore, the deformation quantity of memory alloy wires can be controlled; the pressure values of supporting points after deformation are fed back to thecentral signal processor through pressure sensors; continuous adjustment is carried out, so that stress exerted by the flexible supporting module onto supporting portions can be finely adjusted and balanced; the influence of the errors of block supporting structures such as motors can be avoided; the static and dynamic structural rigidity of the supporting structure of the method of the inventioncan be adaptively and intelligently adjusted, and therefore, the influence of gravity, external load, temperature change, vibration and the like on the surface form accuracy of the reflector can be decreased.

Description

technical field [0001] The invention belongs to the technical field of space optical detection, and in particular relates to an adaptive support method for a large-diameter reflector. Background technique [0002] With the continuous development of science and technology and the continuous improvement of earth observation requirements, space mirrors with high resolution, wide coverage, large aperture and long focus have gradually become the main development trend of optical remote sensors. Among them, the diameter of large-scale space optical mirrors is also increasing (1 ~ 4m), and the surface shape requirements include the RMS value of the surface shape error (λ is the wavelength), the thermal effect of the reflector should be within 20-100K. The assembly of large-aperture space optical mirrors is to form the mirror assembly through the support structure and then install it on the main structure of the space remote sensor. The factors that affect the accuracy of the mirr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B7/183G01L1/06
Inventor 李蓉杨树玄林卫睢娟张巨勇陈志平
Owner HANGZHOU DIANZI UNIV
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