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An Adaptive Supporting Method for Large-Aperture Mirrors

A large-diameter mirror, adaptive technology, applied in the direction of instrument, installation, optics, etc., can solve the problem of 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: 2021-06-01
HANGZHOU DIANZI UNIV
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  • Abstract
  • Description
  • Claims
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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

Method used

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  • An Adaptive Supporting Method for Large-Aperture Mirrors
  • An Adaptive Supporting Method for Large-Aperture Mirrors
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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 support method for a large-diameter reflector. It is difficult to ensure the surface accuracy and assembly requirements of the mirror under the working conditions of self-weight and temperature changes at the same time with the existing mirror support method. The memory alloy driving module of the present invention is uniformly distributed in the flexible support module at six points, and the flexible support module is fine-tuned; more than three flexible support units are evenly distributed along the circumference of the reflector to support the reflector. The invention adopts the driving characteristic of the memory alloy, controls the heating of the memory alloy through the central signal processor, thereby controls the deformation amount of the memory alloy wire, and feeds back the pressure value of the support point after deformation to the central signal processor through the pressure sensor, and continuously adjusts it. Balance and fine-tune the pressure of the flexible support module on the support part, without the influence of the error of the block support structure such as the motor, adaptively and intelligently adjust the static and dynamic structural stiffness of the support structure, thereby reducing gravity, external load, temperature change and vibration, etc. Influence on the surface shape accuracy of the reflector.

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 Patents(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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