空間計算機結(jié)構(gòu)的動力學仿真與適應性設(shè)計研究
發(fā)布時間：2018-08-01 12:31
【摘要】： 空間計算機是指安裝在各種導彈、衛(wèi)星、火箭、飛船及各類空間探測器內(nèi)部的嵌入式計算機,它具有體積小、結(jié)構(gòu)緊湊、功能密度高、環(huán)境適應性強等特點。作為各種航天飛行器和武器裝備系統(tǒng)中的智能中樞,它承擔著大量的數(shù)據(jù)處理、事務(wù)管理等任務(wù)�？臻g計算機及其環(huán)境適應性技術(shù)一直以來都是發(fā)達國家的研發(fā)重點,隨著二代導航、天基信息網(wǎng)、新一代精確末制導導彈、新一代運載火箭、新一代戰(zhàn)略導彈等新型航天型號和武器裝備研制任務(wù)的展開,對空間計算機的環(huán)境適應性提出了更高的要求。 本文在前人相關(guān)研究工作的基礎(chǔ)上,對空間計算機的力學適應性設(shè)計思路、設(shè)計方法、解決方案,以及相應的結(jié)構(gòu)可靠性設(shè)計問題進行了較為系統(tǒng)和深入的研究。結(jié)合空間計算機力學適應性設(shè)計的具體要求,研究了空間計算機動力學仿真建模的一般方法、PCB組件的一階頻率仿真精度問題、具有頻率約束的PCB組件優(yōu)化設(shè)計問題、隨機振動條件下元器件引腳疲勞壽命的估算方法、兩種內(nèi)置式PCB組件的阻尼減振方法等問題,并對相關(guān)內(nèi)容進行了試驗驗證。 論文以相關(guān)理論研究為基礎(chǔ),從工程實際需求出發(fā),以空間計算機力學環(huán)境適應性設(shè)計與動力可靠性研究為主題,為工程中有迫切需求的設(shè)計問題提供相應的設(shè)計方法和解決途徑。論文既不失力學適應性設(shè)計的主線,又有所側(cè)重。 本論文所開展的具體研究內(nèi)容為: 1.從整機、PCB組件、器件三個層次分別研究了空間計算機力學適應性設(shè)計的方法,整機以減振器應用技術(shù)為主,PCB組件以頻率優(yōu)化設(shè)計為主,器件級以動力學響應分析和結(jié)構(gòu)可靠性計算為主; 2.研究空間計算機動力學仿真分析中建模方法與簡化原則,分析造成PCB組件力學仿真分析結(jié)果與物理試驗數(shù)據(jù)之間誤差的產(chǎn)生原因,并確定各誤差因素對于仿真結(jié)果精度的影響程度; 3.研究了具有不確定性參數(shù)的多自由度振動的區(qū)間特征值問題,基于Rayleigh商法推導了特征值和隨機激勵下動力響應的快速計算方法;并將該方法用于PCB組件各結(jié)構(gòu)參數(shù)的敏感度分析和動力學響應優(yōu)化設(shè)計。 4.針對PCB組件的力學適應性設(shè)計問題,選擇了工程中具有代表性的PCB組件的頻率約束優(yōu)化設(shè)計問題作為研究對象,采用雙變量切比雪夫多項式構(gòu)造了該問題的響應面優(yōu)化設(shè)計模型,并給出了可行解的存在性判據(jù); 5.針對器件級力學適應性設(shè)計問題,重點研究了隨機振動激勵下器件引腳的結(jié)構(gòu)動力可靠性問題,提出了在力學環(huán)境的時間歷程中空間計算機結(jié)構(gòu)壽命的估算方法; 6.針對工程具體應用需求,研究了空間計算機的內(nèi)置式印制板級減振設(shè)計新方法,并通過物理試驗驗證了該減振設(shè)計方案的有效性。
[Abstract]:Space computer is an embedded computer installed in the interior of various missiles, satellites, rockets, spaceships and various space detectors. It has the characteristics of small size, compact structure, high function density, strong environmental adaptability and so on. As the intelligent center of various spaceflight vehicles and weapon systems, it undertakes a lot of tasks such as data processing, transaction management and so on. Space computers and their environmental adaptability technologies have long been the focus of research and development in developed countries, with the second generation of navigation, space-based information network, a new generation of precision terminal guidance missiles, a new generation of launch vehicles, The development of new space models and weapon equipment, such as new generation strategic missiles, puts forward higher requirements for the environmental adaptability of space computers. On the basis of previous research work, this paper makes a systematic and in-depth study on the design ideas, design methods, solutions and corresponding structural reliability design problems of space computers. According to the specific requirements of space computer mechanics adaptive design, the paper studies the general method of spatial computer dynamics simulation modeling, the accuracy of first-order frequency simulation of PCB components, and the optimization design problem of PCB components with frequency constraints. The methods of estimating the fatigue life of the pin of components under random vibration and the damping and vibration damping methods of two built-in PCB components are discussed and verified by experiments. On the basis of relevant theoretical research, the thesis starts from the actual engineering demand, and studies the adaptability design and dynamic reliability of space computer mechanics environment. To provide the corresponding design methods and solutions for the urgent need of engineering design problems. The thesis is not only the main line of mechanical adaptability design, but also some emphasis. The specific research contents of this paper are as follows: 1. The adaptive design method of spatial computer mechanics is studied from three levels of PCB assembly and device. The main technology of the whole machine is the application technology of shock absorber, and the PCB component is based on frequency optimization design. The main components are dynamic response analysis and structural reliability calculation. 2. This paper studies the modeling method and simplified principle in the simulation analysis of spatial computer dynamics, and analyzes the causes of the error between the result of mechanical simulation analysis of PCB components and the data of physical test. And determine the error factors on the accuracy of simulation results; 3. In this paper, the interval eigenvalue problem of multi-degree-of-freedom vibration with uncertain parameters is studied. Based on Rayleigh quotient method, the fast calculation method of dynamic response under random excitation and eigenvalue is derived. The method is applied to the sensitivity analysis of each structure parameter of PCB module and the optimization design of dynamic response. 4. Aiming at the problem of mechanical adaptability design of PCB components, the frequency constrained optimization design problem of representative PCB components in engineering is chosen as the research object. The response surface optimization design model of the problem is constructed by using bivariate Chebyshev polynomials, and the existence criteria of feasible solutions are given. In order to solve the problem of mechanical adaptability design of device level, the dynamic reliability of device pin under random vibration excitation is studied. In this paper, the method of estimating the life of space computer structure in the time course of mechanical environment is put forward. 6. In order to meet the practical requirements of engineering, a new design method of built-in printed circuit board (PCB) for space computer is studied, and the effectiveness of the design is verified by physical experiments.
【學位授予單位】：西安電子科技大學
【學位級別】：博士
【學位授予年份】：2009
【分類號】：TP391.9
本文編號：2157588
[Abstract]:Space computer is an embedded computer installed in the interior of various missiles, satellites, rockets, spaceships and various space detectors. It has the characteristics of small size, compact structure, high function density, strong environmental adaptability and so on. As the intelligent center of various spaceflight vehicles and weapon systems, it undertakes a lot of tasks such as data processing, transaction management and so on. Space computers and their environmental adaptability technologies have long been the focus of research and development in developed countries, with the second generation of navigation, space-based information network, a new generation of precision terminal guidance missiles, a new generation of launch vehicles, The development of new space models and weapon equipment, such as new generation strategic missiles, puts forward higher requirements for the environmental adaptability of space computers. On the basis of previous research work, this paper makes a systematic and in-depth study on the design ideas, design methods, solutions and corresponding structural reliability design problems of space computers. According to the specific requirements of space computer mechanics adaptive design, the paper studies the general method of spatial computer dynamics simulation modeling, the accuracy of first-order frequency simulation of PCB components, and the optimization design problem of PCB components with frequency constraints. The methods of estimating the fatigue life of the pin of components under random vibration and the damping and vibration damping methods of two built-in PCB components are discussed and verified by experiments. On the basis of relevant theoretical research, the thesis starts from the actual engineering demand, and studies the adaptability design and dynamic reliability of space computer mechanics environment. To provide the corresponding design methods and solutions for the urgent need of engineering design problems. The thesis is not only the main line of mechanical adaptability design, but also some emphasis. The specific research contents of this paper are as follows: 1. The adaptive design method of spatial computer mechanics is studied from three levels of PCB assembly and device. The main technology of the whole machine is the application technology of shock absorber, and the PCB component is based on frequency optimization design. The main components are dynamic response analysis and structural reliability calculation. 2. This paper studies the modeling method and simplified principle in the simulation analysis of spatial computer dynamics, and analyzes the causes of the error between the result of mechanical simulation analysis of PCB components and the data of physical test. And determine the error factors on the accuracy of simulation results; 3. In this paper, the interval eigenvalue problem of multi-degree-of-freedom vibration with uncertain parameters is studied. Based on Rayleigh quotient method, the fast calculation method of dynamic response under random excitation and eigenvalue is derived. The method is applied to the sensitivity analysis of each structure parameter of PCB module and the optimization design of dynamic response. 4. Aiming at the problem of mechanical adaptability design of PCB components, the frequency constrained optimization design problem of representative PCB components in engineering is chosen as the research object. The response surface optimization design model of the problem is constructed by using bivariate Chebyshev polynomials, and the existence criteria of feasible solutions are given. In order to solve the problem of mechanical adaptability design of device level, the dynamic reliability of device pin under random vibration excitation is studied. In this paper, the method of estimating the life of space computer structure in the time course of mechanical environment is put forward. 6. In order to meet the practical requirements of engineering, a new design method of built-in printed circuit board (PCB) for space computer is studied, and the effectiveness of the design is verified by physical experiments.
【學位授予單位】：西安電子科技大學
【學位級別】：博士
【學位授予年份】：2009
【分類號】：TP391.9
【引證文獻】
相關(guān)期刊論文 前3條
1 任建峰;;PCB組件動態(tài)特性的仿真與實驗研究[J];電子機械工程;2010年05期
2 任建峰;;基于實驗數(shù)據(jù)的PCB組件模型修正和阻尼選擇[J];電子機械工程;2013年04期
3 任建峰;;電子設(shè)備PCB組件的動態(tài)特性研究[J];機電工程技術(shù);2010年12期
相關(guān)會議論文 前1條
1 任建峰;許勁飛;;印制板組件動態(tài)特性分析與失效預測[A];2010第十五屆可靠性學術(shù)年會論文集[C];2010年
相關(guān)碩士學位論文 前1條
1 羅圣和;印制電路板組件的振動分析與控制[D];西安電子科技大學;2012年
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