本文選題：星載二維跟蹤轉(zhuǎn)臺(tái)　切入點(diǎn)：試驗(yàn)?zāi)B(tài)　出處：《中國(guó)科學(xué)院研究生院（上海技術(shù)物理研究所）》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：在空間光通信中，需要光電跟瞄系統(tǒng)（ATP系統(tǒng)），用于構(gòu)建光通信高精度鏈路。二維跟蹤轉(zhuǎn)臺(tái)通常作為ATP系統(tǒng)粗跟蹤模塊的執(zhí)行單元，其技術(shù)水平的發(fā)展與空間環(huán)境適應(yīng)性對(duì)整個(gè)ATP系統(tǒng)，乃至整個(gè)星地光通信的實(shí)現(xiàn)均起著至關(guān)重要的作用。本論文系統(tǒng)地開(kāi)展二維跟蹤轉(zhuǎn)臺(tái)的結(jié)構(gòu)設(shè)計(jì)與空間環(huán)境適應(yīng)性研究，主要研究?jī)?nèi)容包含以下幾個(gè)方面： 1）從軸系支撐與振動(dòng)控制理論中尋求高剛度軸系支撐設(shè)計(jì)的基本原則；通過(guò)二維轉(zhuǎn)臺(tái)試驗(yàn)?zāi)B(tài)研究，詳細(xì)剖析了各特征參數(shù)對(duì)轉(zhuǎn)臺(tái)動(dòng)力學(xué)響應(yīng)特性的影響；對(duì)軸系支撐的有限元模擬方法進(jìn)行了研究；通過(guò)轉(zhuǎn)臺(tái)力學(xué)模型的構(gòu)建和數(shù)值分析方法，為轉(zhuǎn)臺(tái)動(dòng)力學(xué)特性進(jìn)一步優(yōu)化設(shè)計(jì)提供思路與途徑；最后，指出了現(xiàn)行環(huán)境模擬試驗(yàn)的缺陷； 2）二維轉(zhuǎn)臺(tái)的高剛度和低摩擦是一對(duì)相互矛盾的優(yōu)化目標(biāo)，過(guò)松的配合會(huì)降低軸系剛度和響應(yīng)品質(zhì)，過(guò)緊的配合將使軸系摩擦力矩在真空熱環(huán)境中過(guò)于敏感。提出合理的溫控措施，將是一種十分有效的解決方案； 3）反射式望遠(yuǎn)鏡作為二維跟蹤轉(zhuǎn)臺(tái)的終端負(fù)載，將面臨十分嚴(yán)酷的力學(xué)環(huán)境。提出通過(guò)結(jié)構(gòu)優(yōu)化提高望遠(yuǎn)鏡固有頻率，通過(guò)動(dòng)力吸振器降低次鏡響應(yīng)； 4）從自由狀態(tài)二維轉(zhuǎn)臺(tái)的動(dòng)力學(xué)特性研究入手，尋找轉(zhuǎn)臺(tái)鎖定更為合理的方式，提出了一種較有新意的鎖緊機(jī)構(gòu)設(shè)計(jì)方案。 本文的創(chuàng)新點(diǎn)主要有： 1）對(duì)星載二維跟蹤轉(zhuǎn)臺(tái)進(jìn)行了較為全面的試驗(yàn)?zāi)B(tài)研究，分析了各特征參數(shù)對(duì)轉(zhuǎn)臺(tái)動(dòng)力學(xué)響應(yīng)特性的影響； 2）提出了二維轉(zhuǎn)臺(tái)的高剛度與低摩擦是一對(duì)相互矛盾的設(shè)計(jì)變量，并指出軸系配合間隙在此所起到的關(guān)鍵作用； 3）提出了一種全新的星載二維跟蹤轉(zhuǎn)臺(tái)鎖定方式。
[Abstract]:In space optical communication, the optoelectronic tracking and pointing system is needed to construct the high-precision link of optical communication. The two-dimensional tracking turntable is usually used as the executive unit of the coarse tracking module of the ATP system. The development of the technology level and the adaptability of the space environment play an important role in the whole ATP system and even the realization of the whole satellite-to-ground optical communication. In this paper, the structure design and the space environment adaptability of the two-dimensional tracking turntable are systematically carried out. The main research contents include the following aspects:. 1) seek the basic principle of high rigidity shafting support design from the shafting support and vibration control theory, analyze the influence of each characteristic parameter on the dynamic response characteristics of the turntable in detail through the experimental modal research of two-dimensional turntable; The finite element simulation method of shafting support is studied. Through the construction of mechanical model and numerical analysis method of turntable, the train of thought and approach are provided for the further optimization design of dynamic characteristics of turntable. Finally, The defects of current environmental simulation tests are pointed out. 2) the high stiffness and low friction of the two dimensional turntable are a pair of contradictory optimization objectives, too loose coordination will reduce the stiffness and response quality of the shaft system. Too tight coordination will make the shafting friction torque too sensitive in the vacuum thermal environment. It is a very effective solution to put forward reasonable temperature control measures. 3) as the terminal load of the two-dimensional tracking turntable, the reflector telescope will face a very harsh mechanical environment. It is proposed to improve the natural frequency of the telescope through structural optimization and to reduce the secondary mirror response through the dynamic vibration absorber. 4) based on the study of the dynamic characteristics of the two dimensional turntable in free state, a more reasonable way to lock the turntable is found, and a new design scheme of locking mechanism is put forward. The innovations of this paper are as follows:. 1) the experimental modal of the spaceborne two-dimensional tracking turntable is studied, and the influence of each characteristic parameter on the dynamic response of the turntable is analyzed. 2) it is pointed out that the high stiffness and low friction of the two dimensional turntable are a pair of contradictory design variables, and the key role of the matching clearance of the shafting is pointed out. 3) A novel two-dimensional tracking turntable locking method is proposed.
【學(xué)位授予單位】：中國(guó)科學(xué)院研究生院（上海技術(shù)物理研究所）
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN929.1

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