电磁防护仿生技术研究的进展与展望

为了从生物中汲取灵感,进而设计抗干扰能力强、可靠性高的电子系统,对近些年新兴的电磁防护仿生技术的发展脉络进行了详细总结.阐述了电磁防护仿生技术主要研究内容,并展示了现阶段电磁防护仿生研究已取得的成果.生物的神经系统是高度复杂的信息处理和控制系统,具有自组织和自适应的优良特性,同时也具有很高的容错能力.因此,结合神经信息处理方式、编码特点和集成电路实现,进一步探讨和分析了进行电磁防护仿生研究的新思路.     

导弹故障诊断系统硬件可靠性设计

对某导弹故障诊断系统硬件可靠性设计为三方面,即抗电源、地线干扰以实现电磁兼容性目标;降低热阻、增加散热渠道以实现热设计目标和减振设计以实现抗机械振动性目标,从而实现了军标相应项目严酷度等级对该系统的要求.     

固体火箭发动机喷管热防护设计

为保证固体火箭发动机(Solid Rocket Motor,SRM)尾翼机构工作的可靠性,进行热防护设计以控制喷管外壁温度.基于三维有限元法对喷管工作时的温度场进行数值仿真,获取发动机喷管在温度和压力载荷联合作用下的温度场分布,结果表明原喷管的热防护不满足要求,通过对喷管各组成结构的重新设计,获得符合设计要求的喷管结构,并且发动机点火试验表明热防护设计满足要求,所得方法可为喷管的设计、试验和生产提供参考.     

提高抗恶劣环境电子设备可靠性的方法

可靠性是产品质量的核心。该文就提高抗恶劣环境电子设备可靠性的技术，如对气候环境防护设计、热设计、缓冲减振设计等技术进行了探讨。     

电磁屏蔽效能稳定性研析

电磁兼容性是嵌入式应用系统设计的重要内容.产品研制中的诸多因素会造成严重的电磁发射和信息泄漏.解决电磁屏蔽要正确选择屏蔽材料,要有良好的屏蔽接口工艺及安装方法,要注意保护屏蔽防护层并注意克服屏蔽体的基本设计缺陷.     

分散型控制系统可靠性设计技术应用研究

从定性和定量两个方面对分散型控制系统中所采用的可靠性设计技术进行了分析和探讨，对其中的冗余设计和减额设计技术利用部分实例数据及其所产生的效果说明了这两种技术对提高系统可靠性的重大作用；对所采用的热设计技术、电磁兼容性设计技术、互联可靠性设计技术及维修性设计技术从定性方面进行了分析。阐述了分散型控制系统由于采用了多种可靠性设计技术，而获得了较高的可靠性水平。事实表明：应用可靠性设计技术是提高系统可靠性水平最有效的手段之一。     

加固机的电磁兼容性和热设计

加固机正朝着集成化、密集化的方向发展,设备相巨之间的电磁干扰和单位面积上产生的热量因此越来越大.电磁干扰和过高的温度使得加固机无法正常工作,因此在加固机中电磁兼容性设计和热设计也越来越重要.该文从电磁兼容性设计和热设计2个方面展开,阐述了加固计算机结构设计的相关技术.     

电子设备可靠性研究

电子设备可靠性直接影响着电子设备的质量。因此,加强电子设备可靠性是设计、生产、使用电子设备的最基本保障。本文主要通过对正确选用电子元器件、电子设备整机的散热措施、电子设备的电磁防护、电路的屏蔽、印制电路板的可靠性布线的分析来对电子设备可靠性设计进行研究。     

印刷电路板制作中电子元件热设计分析

本文从分析电子设备中电子元件的热失效和可靠性与温度变化的关系入手,提出了在印制电路板制作中电子元件的热设计分析的目的、原则和要求,分析了印制电路板的电子元件的选材、布局和通道设计具体实施方案,为电子产品热可靠性设计奠定了基础.     

电磁屏蔽效能稳定性研所

电磁兼容性是嵌入式应用系统设计的重要内容，产品研制中的诸多因素会造成严重的电磁发射和信息泄漏，解决是屏商要正确选择屏蔽材料，要有良好的屏蔽接口工艺及安装方法，要注意保护屏蔽防护层并注意顾报屏蔽体的基本设计缺陷.     

Efficient reliability-based design optimization using a hybrid space with application to finite element analysis

The design of high technology structures aims to define the best compromise between cost and safety. The Reliability-Based Design Optimization (RBDO) allows us to design structures which satisfy economical and safety requirements. However, in practical applications, the coupling between the mechanical modelling, the reliability analyses and the optimization methods leads to very high computational time and weak convergence stability. Traditionally, the solution of the RBDO model is achieved by alternating reliability and optimization iterations. This approach leads to low numerical efficiency, which is disadvantageous for engineering applications on real structures. In order to avoid this difficulty, we propose herein a very efficient method based on the simultaneous solution of the reliability and optimization problems. The procedure leads to parallel convergence for both problems in a Hybrid Design Space (HDS). The efficiency of the proposed methodology is demonstrated on the design of a steel hook, where the RBDO is combined with Finite Element Analysis (FEA).     

奥运电动客车AMTECU电磁兼容设计

实现“绿色奥运,科技奥运,人文奥运”的目标,需要研制、生产纯电动客车。该车采用了自动机械换档系统（AMT）。由于纯电动客车为强电环境,AMT电子控制单元（ECU）必须进行电磁兼容设计,以满足AMT的系统要求。采用了元器件选型技术、多层板布线技术、箱体设计技术、电缆屏蔽处理技术等进行电磁兼容设计。设计的AMT系统ECU电控单元通过了电磁兼容检测试验。实践表明,满足电磁兼容设计的ATMECU工作正常,为奥运提供了合格的产品,得到了用户的高度好评。     

基于可靠性的机动雷达升降机构优化设计

可靠性设计与优化设计在机械设计领域产生巨大的作用,但单方面进行可靠性设计或优化设计,都无法发挥各自的全部潜力.针对这一问题,将二者进行有机结合,开展机械产品的可靠性优化设计成为必然.案例中,以某型机动雷达的升降机构为研究对象,基于Adams对其进行参数化建模,在此基础上,对其开展可靠性优化设计.通过与传统优化设计的对比分析,显示该方法的优越性.     

高速微处理器系统的电磁兼容设计

由于外界环境存在各种电磁干扰，主要介绍高速微处理器系统设计过程中，可能遇到的电磁兼容性问题以及针对这些问题所采取的主要解决方法。重点从电源、时钟源等硬件设计方面进行分析，提出设计过程中的注意事项，提高高速微处理器系统工作的有效性和可靠性。     

煤矿掘进机电控系统的可靠性设计

简单介绍了煤矿掘进机电控系统的组成,分析了影响掘进机电控系统可靠性的设计因素,如技术安全性、软件可靠性、电磁兼容性、环境适应性等,提出了具体的电控系统可靠性设计方案,为掘进机电控系统高可靠、更安全的应用提供了一定的技术支持。     

Sequential optimization and reliability assessment for multidisciplinary systems design

With higher reliability and safety requirements, reliability-based design has been increasingly applied in multidisciplinary design optimization (MDO). A direct integration of reliability-based design and MDO may present tremendous implementation and numerical difficulties. In this work, a methodology of sequential optimization and reliability assessment for MDO is proposed to improve the efficiency of reliability-based MDO. The central idea is to decouple the reliability analysis from MDO with sequential cycles of reliability analysis and deterministic MDO. The reliability analysis is based on the first-order reliability method (FORM). In the proposed method, the reliability analysis and the deterministic MDO use two MDO strategies, the multidisciplinary feasible approach and the individual disciplinary feasible approach. The effectiveness of the proposed method is illustrated with two example problems.     

PC8051F020在HART流量仪表卡应用中的抗干扰设计

在介绍PC8051F020微控制器的功能特点和资源以及HART流量仪表卡设计由来和应用场合的基础上,着重介绍了PC8051F020微控制器在HART流量仪表卡应用中,采用电磁兼容性设计技术和可靠性设计技术,在电路原理图设计到PCB板设计所采取的一些具体方法和措施,以提高HART流量仪表卡的抗干扰能力和工作稳定性。     

确保计算机高可靠性的热设计考虑

主要介绍了为确保计算机高可靠性所采取的热设计措施，涉及风扇，散热器，热管，温差致冷，冷致热接触面材料等。，反映了当今这一领域的发展趋势。     

Optimum values of structural safety factors for a predefined reliability level with extension to multiple limit states

In the field of deterministic structural optimization, the designer reduces the structural cost without taking into account uncertainties concerning materials, geometry and loading. This way, the resulting optimum solution may represent a lower level of reliability and thus a higher risk of failure. It is the objective of reliability-based design optimization (RBDO) to design structures that should be both economic and reliable. The coupling between mechanical modeling, reliability analyses and optimization methods leads to very high computational costs and weak convergence stability. Since the traditional RBDO solution is achieved by alternating between reliability and optimization iterations, the structural designers performing deterministic optimization do not consider the RBDO model as a practical tool for the design of real structures. Fortunately, a hybrid method based on simultaneous solution of the reliability and the optimization problem, has successfully reduced the computational time problem. The hybrid method allows us to satisfy a required reliability level, but the vector of variables here contains both deterministic and random variables. The hybrid RBDO problem is thus more complex than that of deterministic design. The major difficulty lies in the evaluation of the structural reliability, which is carried out by a special optimization procedure. In this paper a new methodology is presented with the aim of finding a global solution to RBDO problems without additional computing cost for the reliability evaluation. The safety factor formulation for a single limit state case has been used to efficiently reduce the computational time . This technique is fundamentally based on a study of the sensitivity of the limit state function with respect to the design variables. In order to demonstrate analytically the efficiency of this methodology, the optimality condition is then used. The efficiency of this technique is also extended to multiple limit state cases. Two numerical examples are presented at the end of the paper to demonstrate the applicability of the new methodology.