全极化微波辐射计定标源装置的研制

发布时间：2018-06-19 15:23

本文选题：定标源 + 结构设计　；参考：《吉林大学》2017年硕士论文

【摘要】：众所周知,地球的海洋面积约占地表面积的百分之七十一,而陆地的面积仅为海洋面积的五分之二,可以说汪洋大海包围着各个大陆,分隔着各个大陆。现如今,世界交流日益频繁,大海作为连接着世界各国文化与经济的纽带,就显得愈发的重要。也因此,掌握准确有效的海洋信息一直是各国学者争相研究的热点问题之一。文中涉及的全极化微波辐射计定标源装置的研制任务,是吉林大学机械学院受中国科学院空间科学与应用中心(以下简称空间中心)委托而展开的。其研究目的是为了攻克某新型全极化微波辐射计的关键技术。这种新型的全极化微波辐射计用于海面风场的观测,主要是观测海洋风速和风向。在微波辐射计开始测量物体辐射能量之前,需要进行定标,定标精度的高低直接决定测量的精度,因此提高定标精度,完善定标源装置结构至关重要。本文旨在研究全极化微波辐射计定标源装置及其结构,使其满足某新型全极化微波辐射计的定标精度要求。本论文主要研究内容包括:(1)查阅大量国内外相关技术文献,了解全极化微波辐射计及其定标技术的发展过程,表明本文研究的目的。(2)研究全极化微波辐射计的定标原理,并根据空间中心提供的技术指标要求,进行定标源装置的结构设计。首先进行了定标源装置的结构布局设计,然后对定标源主壳体、相位发生器、冷热源、非标转盘轴承等主要部件进行了详细的结构设计。(3)定标源装置的有限元分析。应用ANSYS Workbench、Hypermesh等有限元软件,对整体装置进行了分析,主要包括装置在受重力状态下的静力分析和模态分析,装置在工作状态时的热影响分析,以及装置在公路运输环境下的随机振动分析。(4)对定标黑体进行了设计和研制,主要包括黑体涂覆所用新型吸波涂料的研制过程,包括配制过程以及性能测试过程,以及黑体的涂覆过程及装配方法。(5)定标源装置的制造装配和调试。对装置的装配工艺过程进行了研究,根据空间中心所提的技术指标要求,研究了装置的线栅和转盘轴承的装调方法,以满足定标源装置的功能和性能要求。本文对全极化微波辐射计定标源装置进行了结构设计和研制,主要包括装置总体的结构设计,以及主壳体、冷热源、相位发生器等部件的设计,尤其创新设计了一套专用于定标源装置的非标轴承;并研究了定标黑体涂覆所用吸波涂料的配制方法,推进吸波涂料的国产化进程;并对装置进行了制造、装配和调试。经试验和测试,结果表明所研制装置满足各项性能指标要求,为后续的全极化微波辐射计定标源装置的研究提供了一定的理论参考。
[Abstract]:As we all know, the sea area of the earth covers about 71% of the surface area, while the land area is only 2/5 of the ocean area. Nowadays, the communication of the world is becoming more and more frequent, and the sea is becoming more and more important as the link between culture and economy. Therefore, mastering accurate and effective ocean information has always been one of the hot issues that scholars all over the world are scrambling to study. The research and development of the calibration device for the fully polarized microwave radiometer in this paper was commissioned by the Center for Space Science and applications of the Chinese Academy of Sciences (hereinafter referred to as the Space Center) at the College of Mechanics of Jilin University. The purpose of this study is to capture the key technology of a new type of fully polarized microwave radiometer. This new type of fully polarized microwave radiometer is used to observe the wind field of the sea surface, mainly to observe the wind speed and direction of the ocean. Before the microwave radiometer starts to measure the radiation energy of the object, it is necessary to calibrate. The precision of calibration directly determines the precision of measurement, so it is very important to improve the calibration accuracy and perfect the structure of calibration source device. The purpose of this paper is to study the calibration device and its structure of a fully polarized microwave radiometer, so that it can meet the calibration accuracy requirements of a new type of fully polarized microwave radiometer. The main contents of this thesis are as follows: (1) referring to a large number of relevant technical documents at home and abroad to understand the development process of full polarization microwave radiometer and its calibration technology, indicating that the purpose of this paper is to study the calibration principle of full polarization microwave radiometer. According to the technical requirements provided by the space center, the structural design of the calibration source device is carried out. Firstly, the structural layout of the calibration source device is designed, and then the finite element analysis of the calibration source main shell, phase generator, cold and heat source, non-standard turntable bearing and other main components is carried out in detail. By using ANSYS Workbench HyperMesh and other finite element software, the whole device is analyzed, including static analysis and modal analysis under the condition of gravity, thermal impact analysis of the device in the working state. And the random vibration analysis of the device in the environment of highway transportation. (4) the calibration blackbody is designed and developed, which mainly includes the development process of a new type of absorbing coating used in blackbody coating, including the process of preparation and the process of performance testing. And blackbody coating process and assembly method. The assembly process of the device is studied. According to the technical requirements proposed by the space center, the installation and adjustment methods of the line grille and rotary disc bearings of the device are studied to meet the function and performance requirements of the calibration source device. In this paper, the structural design and development of the calibration device for fully polarized microwave radiometer are carried out, including the overall structural design of the device, as well as the design of the main shell, heat and cold source, phase generator and other components. In particular, a set of non-standard bearings specially designed for calibration source equipment is designed, and the preparation method of absorbing coating for calibration blackbody coating is studied to promote the localization process of absorbing coating, and the device is manufactured, assembled and debugged. The experimental results show that the developed device meets the requirements of various performance indexes and provides a theoretical reference for the subsequent research on the calibration device of fully polarized microwave radiometer.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TH766

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