本文選題：介質(zhì)深層充電　切入點(diǎn)：高能電子譜　出處：《南京航空航天大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：在軌航天器運(yùn)行時(shí)會(huì)受到高能帶電粒子的作用而引起空間輻射效應(yīng),其中,深層介質(zhì)充放電是最具威脅的效應(yīng)之一。高能粒子進(jìn)入到材料深部,引起充放電過程,會(huì)產(chǎn)生直接的器件損傷,同時(shí)充放電過程中產(chǎn)生的放電電磁脈沖會(huì)干擾航天器電子系統(tǒng)的正常工作。對(duì)航天器介質(zhì)深層充放電的研究,不僅是我國航天活動(dòng)深入發(fā)展的保障,而且是我國航天器長壽命和高可靠性發(fā)展趨勢的要求所在。首先,本文系統(tǒng)性地研究了航天器在軌運(yùn)行時(shí)的空間環(huán)境因素以及可能產(chǎn)生的輻射效應(yīng),并作為后續(xù)研究的基礎(chǔ)。其次介紹了航天器所處的軌道及其軌道下的高能輻射粒子分布,基于FLUMIC建立了外輻射帶高能電子模型,得到了地球同步軌道最惡劣高能電子環(huán)境通量水平及能譜分布。其次,分別使用經(jīng)驗(yàn)公式和Geant4模擬了衛(wèi)星典型材料內(nèi)部電子輸運(yùn)過程及能量分布,進(jìn)而建立RIC解析模型求解了背面接地時(shí)介質(zhì)材料內(nèi)電場分布,改變了材料的參數(shù),分析了介質(zhì)材料的性能對(duì)其深層帶電的影響。研究表明:材料密度對(duì)深層帶電影響不大;本征電導(dǎo)率影響很大,當(dāng)本征電導(dǎo)率高于111410????m時(shí),不易發(fā)生介質(zhì)深層帶電問題;針對(duì)TEFLON這種材料厚度大于等于5mm時(shí),裸露在GEO軌道上,最大電場能達(dá)到7.8×107V/m,可能會(huì)出現(xiàn)擊穿。最后,根據(jù)深層充電的模式及形成電場的特點(diǎn),研究了其放電機(jī)制,利用FDTD求解麥克斯韋方程組的方法,求解了特定電流脈沖下產(chǎn)生的電磁脈沖,研究了放電過程中產(chǎn)生的電磁輻射的時(shí)間結(jié)構(gòu)和功率譜結(jié)構(gòu),為進(jìn)行材料內(nèi)帶電效應(yīng)評(píng)價(jià)和防護(hù)效應(yīng)研究提供了依據(jù)。
[Abstract]:In orbit spacecraft, the space radiation effect will be caused by the action of high energy charged particles, among which, the charge and discharge of deep dielectric is one of the most threatening effects. Direct device damage will occur, and the electromagnetic pulse generated during charge and discharge will interfere with the normal operation of spacecraft electronic system. The study of deep charge and discharge of spacecraft dielectric is not only a guarantee for the further development of space activities in China. It is also the requirement of the development trend of long life and high reliability of spacecraft in China. Firstly, the space environment factors and the possible radiation effects of spacecraft in orbit operation are systematically studied in this paper. Secondly, the orbit of the spacecraft and the distribution of high-energy radiation particles under its orbit are introduced, and the high-energy electron model of the outer radiation band is established based on FLUMIC. The flux level and energy spectrum distribution of the most severe high energy electron environment in geosynchronous orbit are obtained. Secondly, the electron transport process and energy distribution in typical satellite materials are simulated by empirical formula and Geant4, respectively. Then the RIC analytical model is established to solve the electric field distribution in the dielectric material when the back ground is grounded, and the parameters of the material are changed, and the influence of the properties of the dielectric material on the deep charge is analyzed. The results show that the density of the material has little effect on the deep layer electrification. The intrinsic conductivity is very important when the intrinsic conductivity is higher than 111410? ? ? ? When the thickness of TEFLON is greater than or equal to 5 mm, the maximum electric field can reach 7.8 脳 10 ~ 7 V / m, and the maximum electric field can reach 7.8 脳 10 ~ 7 V / m. Finally, according to the mode of deep charging and the characteristics of forming electric field, The discharge mechanism is studied. The electromagnetic pulse generated by a specific current pulse is solved by using FDTD to solve Maxwell's equations. The time structure and power spectrum structure of electromagnetic radiation generated during discharge are studied. The results provide a basis for the evaluation of the internal electrification effect and the study of the protective effect.
【學(xué)位授予單位】：南京航空航天大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：V520

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 張憲生;非地球同步軌道的潛力[J];世界導(dǎo)彈與航天;1989年06期

2 陳裕平;;非地球同步軌道的潛在使用價(jià)值[J];國外空間動(dòng)態(tài);1989年09期

3 李澄宙;;改進(jìn)能源號(hào)火箭發(fā)射大型地球同步軌道平臺(tái)[J];國外導(dǎo)彈與航天運(yùn)載器;1990年10期

4 胡炳森,邱家穩(wěn),王濱,常天海;模擬地球同步軌道輻照環(huán)境對(duì)光學(xué)太陽反射鏡性能的影響[J];中國空間科學(xué)技術(shù);1992年01期

5 王若衡;曹秀云;;美國計(jì)劃發(fā)射地球同步軌道目標(biāo)巡視衛(wèi)星[J];中國航天;2014年04期

6 陳道明;張照炎;;如何處置靜止軌道上廢棄的衛(wèi)星[J];中國空間科學(xué)技術(shù);1990年03期

7 張永維;;衛(wèi)星充/放電問題研究概況[J];國外空間動(dòng)態(tài);1984年12期

8 高景林;;日本宇宙開發(fā)事業(yè)團(tuán)的跟蹤與控制系統(tǒng)[J];國外導(dǎo)彈與宇航;1983年05期

9 劉贊;高益軍;;逆行地球同步軌道特性探索[J];空間控制技術(shù)與應(yīng)用;2009年04期

10 許捷;日本發(fā)射H－2火箭[J];中國航天;1994年03期

相關(guān)會(huì)議論文 前8條

1 周國成;王德駒;汪學(xué)毅;曹晉濱;蔡春林;;1998年4-5月地球同步軌道MeV電子通量增強(qiáng)事件[A];中國空間科學(xué)學(xué)會(huì)空間探測專業(yè)委員會(huì)第十三次學(xué)術(shù)會(huì)議論文集[C];2000年

2 朱文明;;空間電子效應(yīng)研究[A];第十屆全國日地空間物理學(xué)術(shù)討論會(huì)論文摘要集[C];2003年

3 劉靜波;黃朝暉;王赤;;地球同步軌道磁場對(duì)太陽風(fēng)動(dòng)壓脈沖的響應(yīng)[A];第十一屆全國日地空間物理學(xué)術(shù)討論會(huì)論文摘要集[C];2005年

4 肖飛;王瑋;劉人杰;;北斗衛(wèi)星導(dǎo)航系統(tǒng)技術(shù)發(fā)展與應(yīng)用[A];第十四屆中國科協(xié)年會(huì)第20分會(huì)場：轉(zhuǎn)型創(chuàng)新促通信業(yè)新發(fā)展論壇論文集[C];2012年

5 楊曉超;王春琴;荊濤;張s乓，

本文編號(hào)：1605780