共查询到18条相似文献,搜索用时 140 毫秒
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阐述了产品研制和生产过程中各类试验的考核目的及试验机理,分析了美国军用规范和我国在研项目研制规范和在制项目生产规范检验分类的演变及其异同,列举了生产过程控制的主要内容,提出了通过加强生产过程控制和环境应力筛选以逐步代替定期试验的建议。 相似文献
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本文研究了产品环境应力筛选和可靠性验证试验中对试验设备的要求,以及试验设备主要技术指标的确定。其中一些数据资料对受试产品的承制厂和试验设备的生产厂,在选用、订购或研制有关试验设备有一定参考价值,可避免订购的或研制的试验设备不满足产品进行可靠性试验的要求。 相似文献
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温度试验几乎贯穿于产品的研制和生产的各个阶段。在元器件的可靠性筛选(寿命筛选和应力筛选)、定型试验、型式试验以及验收试验中,都要做各种适当的温度试验。本文探讨温度试验的目的和种类、试验条件、标准对温度箱的要求以及发展趋势。 相似文献
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本文介绍了近十年来美国在环境试验理论和方法方面的发展,着重介绍了环境试验标准剪裁、综合环境试验和环境应力筛选的发展过程。指出当前美国在环境试验方面力求更合理地制定环境试验要求,努力把环境试验与产品整个研制过程更紧密地结合起来,从而使环境工程对产品的质量和可靠性保证起到更大的作用。 相似文献
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本文强调环境试验对提高产品可靠性的重要意义。探讨环境试验的原理与方法、发展与现状、试验效果、试验技术。文章指出,利用基于加速原理,强化某项或某几项环境因素进行的筛选试验,不但可减少研制与修理费用,加快产品研制与生产进度,而且可提高产品的现场使用可靠性。 相似文献
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产品所承受的环境应力是影响其可靠性的主要因素之一。利用环境技术可以使产品的可靠性得以提高。完善的环境防护设计可以降低产品承受的环境应力,因而增加其固有可靠性。另外,适当地增加某些环境应力,使其超过产品寿命期内所经历的环境应力水平但又不超过设计极限,则能有效地激发产品元件和工艺上潜在的缺陷,使其早期暴露,从而达到提高产品现场使用的可靠性。高效应力筛选就是这样一种有效的手段。 相似文献
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本文从军工电子产品环境试验出发,介绍了环境试验的三种形式,分另4从四个方面阐述了环境试验与可靠性试验和环境应力筛选试验之间的区别和联系,并对环境试验中个试验项目顺序的选择进行了讨论,最后推荐了在军工电子产品定型试验和批次产品验收试验时的环境试验的项目顺序。 相似文献
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本文论述了电子产品高加速应力筛选试验的流程和方法,包括高加速应力筛选试验剖面设计和筛选验证等,并将该试验方法在某机载惯导产品进行了应用。这一方法对于其他机载电子产品的高加速筛选工作有一定的指导意义。 相似文献
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The notion that the physical healthcare environment can affect our mood and behavior is well established. Despite this, individual differences in sensitivity to environmental stimuli have not received much attention. With the current research showing the importance of individual differences in sensitivity towards color, these may explain the contradictory effects found in color research. Two experiments focused on differences in environmental sensitivity, measured with stimulus screening ability. In both experiments, participants were presented with a scenario describing hospitalization with appendicitis and were exposed to a photo of a hospital room. The experiments tested the effects of environmental coloring of the hospital room (green and orange, both contrasted with white as a control condition), and the moderating role of stimulus screening ability (high-screeners vs. low-screeners) on stress (study 1) and arousal (study 2), and cognitive appraisals of the room (study 2). Stress-reducing effects of green and arousal-inducing effects of orange were both more pronounced for people scoring low on stimulus screening ability than for those who are able to effectively screen out complexity in the environment (high-screeners). 相似文献
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目前,筛选试验中振动应力量值选取大多采用GJB推荐值,而不同产品有其不同动力学特性,从而很难保证各类产品都达到强筛选效果.针对这种不足,本文提出一种根据产品实测响应而确定振动量级的新方法,并以电子组件为例,给出具体的实施方法及操作过程中诸多问题的解决办法.实践证明本方法具有推广价值. 相似文献
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Stress results when an individual has less control over an environment or a situation than is desired. One way of regaining control and reducing stress is to regulate privacy by screening the self from spatial, visual or acoustical invasion. This study examined the use of architectural features to regulate privacy under hypothetical situations that are likely to generate low, moderate and high stress, comparing the seating choices of males and females in a variety of dining scenarios in a restaurant. In more stressful circumstances such as those associated with a job interview, participants chose restaurant seating bounded by more architectural features than they did in more relaxed dining situations such as dining with friends. Males and females appeared to be different in their responses to moderate and high stress situations. These results have implications for designers of secondary settings where stressful interactions are likely to take place. 相似文献
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科学加强环境应力筛选以提高电子产品可靠性 总被引:1,自引:0,他引:1
针对其电子产品的可靠性越来越高的需求,本文提出了为剔除电子产品早期故障,环境应力筛选(ESS)已成为不可缺少的一个环节。通过分析如何科学加强环境应力筛选分析,以提高电子产品可靠性水平。 相似文献