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radio telescope 【天文學】射電望遠鏡。

radio transparent

Professor duan baoyan proposed an innovative optomechatronic design project of large radio telescope : using six cables to control the feed cabin to which a stewart platform is connected . the elementary adjustment of cables and the fine - adjustment of stewart platform cooperate together to reach the precision demand 段寶巖教授提出了以懸索支撐饋源的初級平臺、將stewart平臺并聯機構固定于初級平臺,由懸索的初調和stewart平臺的精調共同完成饋源的高精度定位控制的方案。

To make full use of the karst formation in guizhou province of china , a large spherical radio telescope array of the arecibo telescope was proposed in china in 1995 . therefore , a completely new design project that integrating mechatronics and optics technologies with several large span cables is proposed to drive the feed - supporting system to realize the high precision positioning . for the high requirement of trajectory tracking of the feed - supporting system with large span cables , the feasibility of stewart platform served as a fine - tuning platform and the accomplishment of the high precision tracking are considered in details in this paper 本文依托新一代大射電望遠機電光一體化創新設計方案,針對饋源指向跟蹤系統高精度軌跡跟蹤要求,以精調stewart平臺為研究對象,進行了6自曲度并聯機器人的運動學優化設計、動力學分析與奇異性分析,設計了強魯棒性自抗擾控制器實現高精度軌跡跟蹤控制;提出了新一代大射電望遠鏡饋源指向跟蹤系統軌跡跟蹤獨立控制策略、軌跡規劃策略和控制模型; 50米縮比模型實驗驗證了軌跡跟蹤控制策略與方法的工程有效姓和可行性。

However , radio telescopes do have their own shortcoming . firstly , radio astronomical images are not as fascinating as optical images . moreover , they do not work like optical telescopes which can receive all visible wavelengths and then produce monochromatic signals by means of filters 可是,射電天文望遠鏡也有它的缺點,首先射電天文圖像并沒有光學照片那么具美感,而且它不像光學望遠鏡般,可以把可見光全部接收,然后加上濾色片分出單色光。

Two astronomers at the university of british columbia observed the subaru deep field heros with the submillimetre scuba camera at the james clerk maxwell telescope a 15 metre aperture radio telescope , also on mauna kea 加拿大英屬哥倫比亞大學兩位天文學家,亦利用同樣位于莫納克亞山上的麥克斯偉望遠鏡james clerk maxwell telescope ,口徑15米的亞毫米波段射電望遠鏡,對從sdf中所發現的四個hero進行觀測。

The special selections for this year include : pic du midi observatory in southern france , the 100 - m - diameter radio telescope in west germany , mare lmbrium area of the moon , milky way , voyager 2 encounters neptune and the m31 galaxy of andromeda 選輯的十二幅珍貴天文圖片包括:法國日中峰天文臺西德一百米口徑射電望遠鏡月面雨海地區銀河航行者二號飛越海王星仙女座大星系m31等。

A successful , well - known project in grid computing is seti @ home , the search for extraterrestrial intelligence program , which used the idle cpu cycles of a million home pcs via screen savers to analyze radio telescope data 網格計算的一個成功的、眾所周知的項目是seti @ home ,即搜索外星智慧的項目,它使用了大約一百萬臺家用pc在屏保時的空閑cpu周期來分析無線電天文望遠鏡的數據。

Based on the in - depth understanding of background and requirements for the mechanical , electronic and optical design for the large radio telescope , software of control system for the 50 meter experiment model is accomplished 本文在全面深入了解大射電望遠鏡機電光一體化創新設計方案設計思想和技術指標基礎上,完成了50m模型控制系統軟件的研制工作。

The advantage of fast lies in its sensitivity which is double that of the arecibo radio telescope , the world s largest radio telescope , and one order of magnitude higher than fully steerable 100 - meter diameter antennas Fast最大的優勢,在于其靈敏度比現時全球最大的阿雷西博射電望遠鏡高一倍,比口徑100米的全可動單天線望遠鏡高一個數量級。

The background and target of the large radio telescope fast are introduced . the study condition of cable structure is reviewed . the studied works of this dissertation are given at the end 本章介紹了大射電望遠鏡fast背景及技術指標;概述了柔性并聯懸索機構的研究現狀以及懸索式饋源支撐系統的主要研究內容;介紹了本文的主要工作和內容。

Unlike ordinary radio telescope receivers , which point and listen to a single point in the sky at any given time , arecibo ' s new multi - beam receiver can point to seven different points simultaneously 與普通的射電望遠鏡接收器在一個給定的時間只能指向并監聽天空中的一個點不同,阿雷西博的新多波束接收機能同時指向7個不同的方向。

To participate , users have to get connected with the internet and run a free program ( runs like a screensaver ) that downloads and analyses radio telescope data as a background task 要參與該項計劃,用戶首先要接駁到互聯網,然后啟動一個免費的程式(如屏幕保護程式般運行) ,以背景工作方式,下載和分析射電望遠鏡數據。

To participate , users have to get connected with the internet and run a free program runs like a screensaver that downloads and analyses radio telescope data as a background task 要參與該項計劃,用戶首先要接駁到互聯網,然后啟動一個免費的程式如屏幕保護程式般運行,以背景工作方式,下載和分析射電望遠鏡數據。

The works in the paper are parts of research work on the large radio telescope ( lt ) . two parts are mainly concerned here : vibration control of cabin and measurement . firstly 本文是大射電望遠鏡( largeradiotelescope )饋源艙支撐結構預研工作的組成部分,主要涉及饋源艙的減振與饋源艙位姿的測量兩部分內容。

It is an unavoidable fact that the radio frequencies in which radio telescopes listen for faint signals from the sky are flooded with not - at - all faint man - made radio signals that originate here on earth 這是一個無法回避的事實,射電望遠鏡所監聽的來自太空的微弱信號淹沒在地面的“強大”人造電波中。

Chapter 1 preface the research background and target of new generation large radio telescope are presented . the technical features and research contents of cable - suspension feed system are described 本章介紹了新一代大射電望遠鏡的研究背景及機電光一體化的懸索饋源系統的技術特點與主要研究內容。

This subject stems from cas knowledge innovation project item : optomechatronics simulation and experiment in the cable - cabin support and point - track system for large radio telescope 本文課題來源于中國科學院知識創新工程項目:大射電望遠鏡饋源支撐與指向跟蹤系統的光機電一體化仿真與實驗研究。

Study on kinematics , real - time measurement , control structure and method , and experiment of cable and cabin system utilized in large radio telescope ( fast project ) has been described 本文研究了大射電望遠鏡fast懸索式饋源支撐系統的運動學理論、動態檢測技術、控制結構與策略以及實驗。

The largest single - dish radio telescope in the world became operational on october 11 . the 76 metres - diameter telescope was installed in jodrell bank , cheshire , uk 1957年10月11日,世界上最大的單碟無線電望遠鏡開始投入使用。此臺望遠鏡的直徑長達76米,被建在英國柴郡的約德雷爾河岸。

The 500 - metre caliber spherical radio telescope is the largest one built and to be built . its capability is one quantity grade higher than the others “ available 500米口徑球面射電望遠鏡fast是國際上現有的和計劃中最大口徑的射電望遠鏡,其綜合性能比國際上現有的設備高一個數量級。