空间计算机结构的动力学仿真与适应性设计研究
发布时间：2018-08-01 12:31
【摘要】： 空间计算机是指安装在各种导弹、卫星、火箭、飞船及各类空间探测器内部的嵌入式计算机,它具有体积小、结构紧凑、功能密度高、环境适应性强等特点。作为各种航天飞行器和武器装备系统中的智能中枢,它承担着大量的数据处理、事务管理等任务。空间计算机及其环境适应性技术一直以来都是发达国家的研发重点,随着二代导航、天基信息网、新一代精确末制导导弹、新一代运载火箭、新一代战略导弹等新型航天型号和武器装备研制任务的展开,对空间计算机的环境适应性提出了更高的要求。 本文在前人相关研究工作的基础上,对空间计算机的力学适应性设计思路、设计方法、解决方案,以及相应的结构可靠性设计问题进行了较为系统和深入的研究。结合空间计算机力学适应性设计的具体要求,研究了空间计算机动力学仿真建模的一般方法、PCB组件的一阶频率仿真精度问题、具有频率约束的PCB组件优化设计问题、随机振动条件下元器件引脚疲劳寿命的估算方法、两种内置式PCB组件的阻尼减振方法等问题,并对相关内容进行了试验验证。 论文以相关理论研究为基础,从工程实际需求出发,以空间计算机力学环境适应性设计与动力可靠性研究为主题,为工程中有迫切需求的设计问题提供相应的设计方法和解决途径。论文既不失力学适应性设计的主线,又有所侧重。 本论文所开展的具体研究内容为: 1.从整机、PCB组件、器件三个层次分别研究了空间计算机力学适应性设计的方法,整机以减振器应用技术为主,PCB组件以频率优化设计为主,器件级以动力学响应分析和结构可靠性计算为主; 2.研究空间计算机动力学仿真分析中建模方法与简化原则,分析造成PCB组件力学仿真分析结果与物理试验数据之间误差的产生原因,并确定各误差因素对于仿真结果精度的影响程度; 3.研究了具有不确定性参数的多自由度振动的区间特征值问题,基于Rayleigh商法推导了特征值和随机激励下动力响应的快速计算方法;并将该方法用于PCB组件各结构参数的敏感度分析和动力学响应优化设计。 4.针对PCB组件的力学适应性设计问题,选择了工程中具有代表性的PCB组件的频率约束优化设计问题作为研究对象,采用双变量切比雪夫多项式构造了该问题的响应面优化设计模型,并给出了可行解的存在性判据; 5.针对器件级力学适应性设计问题,重点研究了随机振动激励下器件引脚的结构动力可靠性问题,提出了在力学环境的时间历程中空间计算机结构寿命的估算方法; 6.针对工程具体应用需求,研究了空间计算机的内置式印制板级减振设计新方法,并通过物理试验验证了该减振设计方案的有效性。
[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.
【学位授予单位】：西安电子科技大学
【学位级别】：博士
【学位授予年份】：2009
【分类号】：TP391.9
本文编号：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.
【学位授予单位】：西安电子科技大学
【学位级别】：博士
【学位授予年份】：2009
【分类号】：TP391.9
【引证文献】
相关期刊论文 前3条
1 任建峰;;PCB组件动态特性的仿真与实验研究[J];电子机械工程;2010年05期
2 任建峰;;基于实验数据的PCB组件模型修正和阻尼选择[J];电子机械工程;2013年04期
3 任建峰;;电子设备PCB组件的动态特性研究[J];机电工程技术;2010年12期
相关会议论文 前1条
1 任建峰;许劲飞;;印制板组件动态特性分析与失效预测[A];2010第十五届可靠性学术年会论文集[C];2010年
相关硕士学位论文 前1条
1 罗圣和;印制电路板组件的振动分析与控制[D];西安电子科技大学;2012年
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