【摘要】：太陽翼驅(qū)動機(jī)構(gòu)(Solar Array Drive Assembly,SADA)對衛(wèi)星有著極其重要的作用。近年來衛(wèi)星故障頻發(fā),這在很大程度上是由于太陽翼出故障所導(dǎo)致的。而太陽翼驅(qū)動機(jī)構(gòu)作為太陽翼系統(tǒng)的重要組成部分,其可靠性研究就尤為重要。由于太空環(huán)境的復(fù)雜性和隨機(jī)因素的影響,太陽翼驅(qū)動機(jī)構(gòu)的故障變得難以預(yù)測;而且受技術(shù)和試驗條件的限制,地面上不能完全模擬太空環(huán)境,故其試驗也不能得到滿意的結(jié)果,所以從理論角度對其可靠性進(jìn)行探討,有著重要的意義�，F(xiàn)有文獻(xiàn)只對太陽翼驅(qū)動機(jī)構(gòu)的各個部件進(jìn)行了建模或分析,沒有對其進(jìn)行系統(tǒng)的可靠性研究。本文將嘗試從多個角度對太陽翼驅(qū)動機(jī)構(gòu)進(jìn)行系統(tǒng)的可靠性分析。 首先,建立了太陽翼驅(qū)動機(jī)構(gòu)的故障模式及影響分析(Failure Mode and Effects Analysis, FMEA)表。分析太陽翼驅(qū)動機(jī)構(gòu)這個復(fù)雜系統(tǒng)的工作原理和結(jié)構(gòu),再對復(fù)雜的太空環(huán)境的特點進(jìn)行總結(jié),分析其對太陽翼驅(qū)動機(jī)構(gòu)的影響,總結(jié)出太陽翼驅(qū)動機(jī)構(gòu)的故障模式,然后按照《故障模式、影響及危害性分析指南》(GJB1391-2006)的規(guī)范要求生成《太陽翼驅(qū)動機(jī)構(gòu)的FMEA表》,為后續(xù)可靠性工作的開展奠定了基礎(chǔ)。 其次,對太陽翼驅(qū)動機(jī)構(gòu)進(jìn)行動態(tài)故障樹分析。由于太陽翼驅(qū)動機(jī)構(gòu)包含著冷備份、熱備份以及其他的動態(tài)邏輯器件,故需要采用動態(tài)故障樹來分析。在權(quán)衡了多種動態(tài)故障樹分析方法后,本文采用二元決策圖(Binary Decision Diagram,BDD)和馬爾科夫模型(Markov Model)相結(jié)合的分析方法,并對Markov模型進(jìn)行了詳細(xì)的推導(dǎo),得出了動態(tài)邏輯門的可靠度公式。再根據(jù)已知數(shù)據(jù)得出了故障樹頂事件即系統(tǒng)的可靠度。 最后,根據(jù)太陽翼驅(qū)動機(jī)構(gòu)的力學(xué)特性,建立運動可靠性模型�？紤]到太陽翼驅(qū)動機(jī)構(gòu)在驅(qū)動過程中會受到各種摩擦力的阻礙,本文將嘗試從摩擦力矩和摩擦力做功兩個方面建立摩擦力模型,并結(jié)合求隨機(jī)變量函數(shù)的數(shù)字特征的矩法,分別得出力矩和做功形式的功能函數(shù),代入數(shù)據(jù)可得到力矩形式和做功形式的可靠度。最后再采用串聯(lián)模型計算出整個太陽翼驅(qū)動機(jī)構(gòu)的力學(xué)形式的可靠度。
[Abstract]:The solar wing driving mechanism (Solar Array Drive Assembly,SADA) plays an extremely important role in the satellite. Satellite failures have occurred frequently in recent years, largely due to solar wing failures. As an important part of solar wing system, the research on the reliability of solar wing driving mechanism is particularly important. Because of the complexity of space environment and the influence of random factors, it is difficult to predict the fault of the solar wing driving mechanism. Due to the limitation of technology and test conditions, the space environment can not be completely simulated on the ground, so the test can not get satisfactory results, so it is of great significance to discuss its reliability from a theoretical point of view. The existing literatures only model or analyze the components of the solar wing drive mechanism, and there is no systematic research on its reliability. This paper attempts to analyze the system reliability of the solar wing drive mechanism from several angles. Firstly, the fault mode and influence analysis (Failure Mode and Effects Analysis, FMEA) table of solar wing drive mechanism are established. This paper analyzes the working principle and structure of the solar wing driving mechanism, summarizes the characteristics of the complex space environment, analyzes its influence on the solar wing driving mechanism, and summarizes the fault mode of the solar wing driving mechanism. Then according to the specification of "failure Mode, impact and Hazard Analysis Guide" (GJB1391-2006), the "FMEA table of solar wing drive mechanism" is generated, which lays a foundation for the subsequent reliability work. Secondly, the dynamic fault tree analysis of the solar wing drive mechanism is carried out. Because the solar wing drive mechanism includes cold backup, hot backup and other dynamic logic devices, it is necessary to use dynamic fault tree to analyze. After weighing a variety of dynamic fault tree analysis methods, this paper adopts the combination of binary decision graph (Binary Decision Diagram,BDD) and Markov model (Markov Model), and deduces the Markov model in detail. The reliability formula of dynamic logic gate is obtained. According to the known data, the reliability of the fault tree top event is obtained. Finally, according to the mechanical characteristics of the solar wing drive mechanism, the motion reliability model is established. Considering that the solar wing drive mechanism will be hindered by various friction forces in the driving process, this paper attempts to establish friction force model from two aspects of friction moment and friction work, and combines the moment method to solve the digital characteristics of random variable function. The function functions of torque and work form are obtained, and the reliability of torque form and work form can be obtained by inserting data. Finally, the series model is used to calculate the reliability of the mechanical form of the whole solar wing drive mechanism.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2011
【分類號】：TH112

【引證文獻(xiàn)】

相關(guān)期刊論文 前1條

1 李彥鋒;黃洪鐘;劉宇;肖寧聰;朱順鵬;;基于貝葉斯網(wǎng)絡(luò)的衛(wèi)星太陽翼驅(qū)動機(jī)構(gòu)系統(tǒng)可靠性建模與評估[J];中國科技論文;2012年08期

相關(guān)博士學(xué)位論文 前1條

1 肖寧聰;隨機(jī)和認(rèn)知不確定性下的結(jié)構(gòu)可靠性方法研究[D];電子科技大學(xué);2012年

相關(guān)碩士學(xué)位論文 前1條

1 許英健;航天器太陽翼動態(tài)影響測量系統(tǒng)的研究與設(shè)計[D];上海交通大學(xué);2012年

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本文編號：2391307