發(fā)布時(shí)間：2018-05-02 21:30

  本文選題：光電穩(wěn)定平臺(tái) + 有限元分析��； 參考：《中國(guó)科學(xué)院研究生院（西安光學(xué)精密機(jī)械研究所）》2014年碩士論文

【摘要】：光電穩(wěn)定平臺(tái)是一種可以安裝多種載荷精密設(shè)備。在軍事和民用方面都體現(xiàn)非凡價(jià)值。軍事方面諸如目標(biāo)追蹤、航空偵察與武器引導(dǎo)等；民用領(lǐng)域主要在地理測(cè)繪、電視直播、災(zāi)情勘察等。本文所涉及的光電穩(wěn)定平臺(tái)為機(jī)載設(shè)備。由于是機(jī)載的，所以要求在保證精度的情況下，質(zhì)量要輕同時(shí)強(qiáng)度還要滿(mǎn)足飛行環(huán)境要求，這對(duì)設(shè)備的設(shè)計(jì)提出了很高的要求。本文分析研究對(duì)象來(lái)自實(shí)際課題項(xiàng)目。文中建模與分析主要內(nèi)容如下： 首先對(duì)設(shè)備中常用的基礎(chǔ)部件：軸承、齒輪、螺釘和減震器進(jìn)行合理的建模與分析。對(duì)基礎(chǔ)部件仿真與解析結(jié)果對(duì)比，確定建模的正確性�；A(chǔ)分析部分不僅為此項(xiàng)目提供了必要的參考數(shù)據(jù)，同時(shí)其分析方法對(duì)后續(xù)工程有借鑒價(jià)值。 其次對(duì)平臺(tái)的兩個(gè)主要零件進(jìn)行分析。對(duì)外框架進(jìn)行分析，從而確定了不同的約束對(duì)模態(tài)的影響；對(duì)內(nèi)框架以不同的材料進(jìn)行了對(duì)比分析，同時(shí)考慮到材料的重量、強(qiáng)度、環(huán)境適應(yīng)性、成本與加工難易程度等，最后確定選擇鎂合金材料。 接著分析了線/角振動(dòng)對(duì)像移的影響，，根據(jù)分析結(jié)果結(jié)合實(shí)際情況采取了消角位移的減振方案。參照無(wú)角位移原理進(jìn)行三維模型的建立，通過(guò)ADAMS進(jìn)行仿真。查看分析結(jié)果，可確定此減振方案的可行性。 最后對(duì)總體進(jìn)行仿真分析。在總體沖擊分析時(shí)，分別分析了有無(wú)減震器時(shí)的沖擊情況，說(shuō)明減震器對(duì)沖擊能量有著充分的衰減作用。但是以此減震器不足以使頻率衰減到理想的要求，修改減震器參數(shù)，以使頻率達(dá)到要求，從而可反推出減震器技術(shù)要求，方便減震器購(gòu)買(mǎi)與定制。 本文對(duì)某快掃光電穩(wěn)定平臺(tái)分部件系統(tǒng)與整體分別進(jìn)行了分析�；A(chǔ)分析的建模合理可行，為以后別的項(xiàng)目分析提供一定參考。整體的平臺(tái)結(jié)構(gòu)的分析為平臺(tái)的設(shè)計(jì)者與后期的生產(chǎn)實(shí)踐提供指導(dǎo)作用。
[Abstract]:Photoelectric stabilization platform is a kind of precision equipment which can be installed with multiple loads. In both military and civilian aspects show extraordinary value. Military aspects, such as target tracking, aviation reconnaissance and weapon guidance, are mainly used in geographic mapping, live television broadcasting, disaster investigation and so on. The optoelectronic stabilization platform involved in this paper is airborne equipment. Because it is airborne, it is required to meet the requirements of flight environment under the condition of ensuring accuracy, light quality and strength, which puts forward a very high requirement for the design of the equipment. The research object of this paper comes from the actual project. The main contents of modeling and analysis are as follows: First, the basic components commonly used in the equipment, such as bearings, gears, screws and shock absorbers, are modeled and analyzed. The correctness of the modeling is determined by comparing the simulation results with the analytical results. The basic analysis part not only provides the necessary reference data for the project, but also has reference value for the subsequent project. Secondly, the two main parts of the platform are analyzed. The external frame is analyzed to determine the influence of different constraints on the modal, and the internal frame is compared with different materials, taking into account the weight, strength, environmental adaptability, cost and processing difficulty of the material, etc. Finally, the selection of magnesium alloy materials was determined. Then, the influence of line / angular vibration on image shift is analyzed. According to the analysis results and the actual situation, the damping scheme of angular displacement is adopted. The three-dimensional model is built according to the principle of non-angular displacement, and the simulation is carried out by ADAMS. Looking at the analysis results, we can determine the feasibility of this vibration reduction scheme. Finally, the simulation analysis of the whole system is carried out. In the overall impact analysis, the impact of the shock absorber is analyzed respectively, which shows that the shock absorber has sufficient attenuation effect on the shock energy. But this kind of absorber is not enough to attenuate the frequency to the ideal requirement, so the parameters of the absorber can be modified to meet the requirements of the frequency, so that the technical requirements of the absorber can be rebooted, and it is convenient to purchase and customize the shock absorber. In this paper, the component system and the whole system of a fast sweep photoelectric stabilization platform are analyzed. The modeling of basic analysis is reasonable and feasible, which provides a certain reference for other project analysis in the future. The analysis of the whole platform structure provides guidance for the designers of the platform and the later production practice.
【學(xué)位授予單位】：中國(guó)科學(xué)院研究生院（西安光學(xué)精密機(jī)械研究所）
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TB535

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