航天电子元器件质量控制与可靠性保障研究

目前,电子通用元器件安全可靠性的不断提升在我国航天企业电子通用元器件应用领域中已经是最关键的,同时也是最重要的。因此,加强产品质量安全控制保障工作,增强其自身安全可靠性,强化电子元器件产品质量控制是我国航天装备企业,尤其是整机技术用户更加密切关注的重要内容。本文主要对有关航天企业电子通用元器件产品质量安全控制与自身可靠性保障提升的几个相关技术问题重点进行了深入的探讨研究,以期能够使航天电子通用元器件的安全使用性和可靠性保障得到极大的强化,推进我国航天事业的健康发展。     

基于应用背景的电子元器件结构分析研究

结构分析技术是一种新颖且行之有效的电子元器件可靠性评估方法。通过对电子元器件的设计、结构、工艺和材料的剖解分析,来确定元器件本身是否存在潜在的失效风险的因素、可靠性问题、工艺缺陷和信息安全隐患等。结构分析不仅直接锁定元器件“不好用”的原因,还指导元器件生产研制单位进行技术改进。本文针对结构分析的可靠性机理、验证流程和验证方案展开论述并给出结论。     

基于Icepak的航天电子产品散热优化仿真分析

随着航天电子产品朝着小型化和集成化方向发展,电子产品内部电子元器件的集成度和功率日益提高。传统的热设计主要基于实物试验采集机箱内部印制板核心元器件的温度,再根据实际情况进行印制板布局调整或结构件改进设计,该过程周期长且需要投入大量的实物试验成本和时间成本,严重制约了航天型号的研制周期。因此,文中以一种航天电子产品为例,通过运用Icepak软件对机箱内部元器件散热问题进行仿真,并通过优化改进,实现了对元器件温度降低达10 ℃以上,提升了产品可靠性。这种仿真手段相比传统模式大大缩短了航天产品的研发周期,降低了研发成本。     

板级电路振动分析及元器件布局优化技术研究

印制电路板上承载着各类电子元器件,使质量、刚度分布不均匀,求解印制电路板振动问题时,很难得到满足微分方程和边界条件的精确解。文中试图从弹性力学理论出发,探讨电子设备结构中印制电路板的振动问题,以及其上电子元器件的布局优化问题。运用弹性力学理论,对板的固有频率计算进行了理论推导,同时分析元器件的布局对振动固有频率的影响。从而得到在元器件布局的时候,尽量使元器件靠近约束,元器件较多时,把大而重的元器件靠近约束的结论,并用有限元计算对结论进行验证,理论分析结果和有限元计算结果吻合较好。     

国产电子元器件应用分析

电子元器件作为高新技术装备的重要基础,是掌握国防主动权的战略资源,对装备战斗力的形成产生直接影响.本文介绍了国产电子元器件应用的必要性和意义,通过对国产电于元器件应用现状进行梳理,指出国产电子元器件应用过程中所遇到的困难,对国产电子元器件应用进行了分析,并给出具有一定指导意义的国产电子元器件应用建议和意见.     

《国外国防制造技术发展报告2014》

<正>本报告以深入的情报跟踪与分析为基础,围绕复杂系统总体设计、虚拟设计与仿真验证、设计/制造集成与协同、数字化车间系统等数字化设计制造及生产管理技术,增材制造、高效数控、精密与微细加工、精密成形、先进焊接、特种加工、表面工程、复合材料及非金属材料制造、装配、电气互联及电子元器件制造、绿色安全生产等工艺与装备技术等在国外航天、航空、船舶、兵器、电子等国防工业的     

《国外国防制造技术发展报告2014》

<正>本报告以深入的情报跟踪与分析为基础,围绕复杂系统总体设计、虚拟设计与仿真验证、设计/制造集成与协同、数字化车间系统等数字化设计制造及生产管理技术,增材制造、高效数控、精密与微细加工、精密成形、先进焊接、特种加工、表面工程、复合材料及非金属材料制造、装配、电气互联及电子元器件制造、绿色安全生产等工艺与装备技术等在国外航天、航空、船舶、兵器、电子等国防工业的     

废旧电路板元器件分离位移模型研究

在焊料加热熔化的前提下,电子元器件拆解取决于在拆解外力作用下元器件相对电路板基板产生的位移即元器件分离位移。首先建立水平拆解和垂直拆解两种方式下不同元器件的分离位移模型;然后重点针对3种典型类型元器件引脚下的焊料在垂直拆解时的断裂高度进行分析,基于牛顿静压力方程和拉普拉斯方程建立了焊料断裂高度的数学模型,并通过实验验证了模型的正确性。废旧电路板上元器件分离位移模型对于确定拆解工艺参数具有重要价值。     

贵州装备制造业带动产业聚集协同发展

<正>三线建设时期国家投资近100亿元,在贵州建成了以教练机研发生产为主的011航空基地、以地对空导弹研发生产为主的061航天基地、以军用电子元器件为主的083电子工业基地。自上世纪90年代以来,三线企业经过调整搬迁、专业化整合,军民融合步伐加快,进一步提升了航空、航天、电子元器件、基础件等核心生产能力。2013年,全省2000万元以上规模装备制造业完成工业总产值685亿元,工业增加值158亿元,同比增长21.2%,对全省工业经济增长的贡献率为6.2%。     

《国外国防制造技术发展报告2014》

<正>本报告以深入的情报跟踪与分析为基础,围绕复杂系统总体设计、虚拟设计与仿真验证、设计/制造集成与协同、数字化车间系统等数字化设计制造及生产管理技术,增材制造、高效数控、精密与微细加工、精密成形、先进焊接、特种加工、表面工程、复合材料及非金属材料制造、装配、电气互联及电子元器件制造、绿色安全生产等工艺与装备技术等在国外航天、航空、船舶、兵器、电子等国防工业的研发与应用,从重大制造技术发展规划及其影响分析、重大制造技术发展动向、制     

Optimizing microstructure in spray-formed and squeeze-cast metal-matrix composites

This paper discusses the methods of optimizing microstructure in the manufacture of spray-formed and squeeze-cast A- and Ti-based metal–matrix composites (MMCs) for a range of automotive and aerospace applications. Three specific MMC material/process/product combinations are considered: spray-formed/extruded Al alloy/SiC particulate-reinforced MMCs for aerospace structural components; squeeze-cast Al alloy/SiC particulate- and Al₂O₃ fibre-reinforced MMCs for automotive components; and spray-formed/diffusion-bonded Ti alloy/SiC fibre-reinforced MMCs for aeroengine components. Important features, which are emphasized in each case, are (i) using specific end applications to define desirable property and therefore microstructural goals; (ii) understanding the underlying process physics to control the resulting mechanisms of microstructural development; and (iii) using numerical modelling and associated experimental validation to allow subsequent implementation of process control systems.     

航天产品准时装配管理技术研究

某航天装配车间生产管理仍是传统的生产管理方式,为了实现装配生产管理的信息化,研究了航天产品准时装配管理技术。引入丰田生产方式中“准时生产”技术,建立以一个流生产和看板管理为实施基础,以标准化作业、生产均衡化、设备合理布置、多技能作业员和全面质量管理为实施手段的航天产品准时装配体系。分析准时装配管理系统需求,并按照JavaEE标准设计包括装配派工执行、装配进度看板、物料配送看板和装配质量看板等功能模块,最后开发了航天产品准时装配管理系统原型。     

航天大型薄壁回转曲面构件成形制造技术的发展与挑战

薄壁曲面构件是广泛应用于航空航天等高端运载装备的关键构件。大型薄壁曲面构件成形制造技术是新一代航空航天飞行器、战略导弹和船舶等尖端装备向大型化、轻量化、高性能化、长寿命和高可靠性方向发展的迫切需要。然而,这类构件的壁薄、直径等尺寸大、曲率变化、大小尺寸极端结合,且材料轻质高强、性能要求高等,使其制造难度大。首先概述了航天领域大型薄壁回转曲面构件及其制造技术的发展历程与类型,据此针对不同类型的大型薄壁回转曲面构件制造技术综述了其应用与研究进展,然后对比分析了各制造工艺的技术特色、构件性能与发展潜力,探讨了大型薄壁回转曲面构件制造技术的未来发展趋势与面临的挑战。     

Active vibration isolation of electronic components by piezocomposite clamped-clamped beam

The sensitive electronic components used in military and aerospace applications endure some intense vibrations. These vibrations have some disturbing effects on the stability and on the service life of these devices. So, protecting these elements becomes a major economic and strategic stake. Vibration isolation can be applied to different levels of the on-board systems. Indeed, it is advisable to isolate electronic components either at the rack level or at the board level or at the component level. In this paper, the last solution is chosen because of low moving masses which imply low control energies.An active suspension system is located between the host board and the sensitive element to be isolated. This designed control system uses a simple Integral Force Feedback strategy. This vibration isolation control is stable for its collocated version and does not need a numerical model of the system to be controlled. Robustness of the system is asymptotically guaranteed. The proposed isolation device, made of alumina for passive structure and made of PZT and PVDF for transducing layers, is experimentally tested. Experimental performances are compared with theoretical performances.     

Investigating the transfer of techniques for electronic technical support documentation from aerospace to machine tools

This paper describes a scoping study that investigated the possible transfer of techniques for creation of electronic technical support documentation from the aerospace industry to the machine tool industry. Electronic maintenance manuals have been supplied by aircraft manufacturers over the past 20 years with demonstrated benefits. Despite research that indicates the likelihood of similar benefits for machine tool users, the supply of electronic technical support documentation (TSD) by machine tool manufacturers is rare, and the techniques for the creation of TSD are inefficient. This paper describes the relevant trends affecting the machine tool industry and the background of the use of electronic TSD in aerospace. Data was collected via interviews with technical authors, document users and software suppliers from both industry sectors, as well as a questionnaire and a workshop. The results were analysed to form a view of the potential for technology transfer over the next 5 years.     

民机项目研制设计过程质量管理

依据国际航空航天质量系列标准要求、SAE ARP4754A民用飞机与系统研制指南要求以及项目管理相关知识,提出了民机项目研制设计过程质量管理模型,阐述了设计质量保证以及设计质量控制的具体内容和方法,总结了设计过程质量数据以及数据的统计分析方法,并提出了设计质量改进的具体措施。     

Transfer function modeling of structural vibration of complex aerospace structures based on finite element analysis

An approach to establish the transfer function of complex aerospace structures to express their structural vibration behavior through finite element modeling is proposed. The fundamental idea of the approach is to characterize the vibrations of complicated structures through the transfer function model for an advanced control system design, while the parameters of the model are identified from the response data obtained through finite element analysis. The proposed method comprises four steps, namely, finite element modeling and validation, data preparation based on the finite element analysis, parameter identification of the transfer function, and model validation, and is presented from both frequency and time domains. The developed approach is applied to a cantilever beam, a strap-on launch vehicle, and a local part of the aerospace structure to demonstrate the method’s effectiveness and satisfactory performance.     

自动气象站中元器件的质量控制

电子元器件是自动气象站的基本组成部分,电子元器件的可靠性关系到整个自动气象站系统的可靠性。本文从电子元器件的选用、采购、验收、二次筛选、破坏性物理分析（DPA）、信息管理等方面,介绍了如何采用优质、可靠的电子元器件,以提高自动气象站的可靠性。     

Custom TFT-LCD for avionics applications: Environmental tests and optical measurements

Avionics represents of the most important industrial sector where innovation is a key issue. In order to guarantee that any new device introduced onboard has an adequate quality and reliability level, testing activity is fundamental to help engineers and technicians to verify their designs and prevent any safety critical failures. National regulatory agencies and standards organizations, such as, the European Union Authority for aviation safety (European Aviation Safety Agency – EASA), the United States defense standard, often called military standard (MIL-STD) carried out by the U.S. Department of Defense or the Radio Technical Commission for Aeronautics (RTCA), have developed several test procedures that have to manage with the customer requirements. This paper is focused on the experimental results related to the validation process of a custom TFT-LCD for avionics applications. Environmental tests and, in particular, optical measurements will be described in detail in order to underline the key role that test plannig and measurements represent in aerospace applications.     

VPX总线模块结构设计规范研究

文中结合设计师在雷达VPX总线模块结构设计研发过程中积累的经验,吸收采纳了相关的设计规范和设计指南,建立了一套VPX总线模块结构设计规范。规范从VPX总线模块的分类、各相关结构设计要素、连接器及导套的选型、面板的元器件布局、模块的加工工艺等方面对VPX总线模块结构设计进行了规定。为更好地指导今后VPX总线模块的结构设计,文中还推荐了导引模块和一些电子器件。