标准摘要
[中文适用范围]: 该国际标准为如何利用故障率数据来预测设备中的电气元件的可靠性提供了指导。参考条件是大多数应用中组件通常观察到的应力数值。参考条件很有用,因为它们是通过应用考虑实际操作条件的应力模型来计算任何条件下故障率的基础。在参考条件下规定的故障率允许在早期设计阶段做出现实的可靠性预测。本文描述的应力模型是通用的,并且可以用作在需要时将这些参考条件下的故障率数据转换为实际操作条件的基础,并且这简化了预测方法。仅允许在组件的指定功能限制内转换故障率数据。该标准还提供了有关如何构建组件故障数据数据库以提供可与所包含的压力模型一起使用的故障率的指导。指定了故障率数据的参考条件@,以便可以在统一的基础上比较不同来源的数据。如果按照本国际标准给出故障率数据,则不需要有关指定条件的附加信息。该标准不提供组件的基本故障率,而是提供模型,允许通过其他方式获得的故障率从一种操作条件转换为另一种操作条件。本标准中描述的预测方法假设零件在其使用寿命内使用。本标准中的方法具有一般应用,但特别适用于第 6 条和第 E.2 条中定义的一系列组件类型。 [外文原描述]: IEC 61709:2011 gives guidance on how failure rate data can be employed for reliability prediction of electric components in equipment. Reference conditions are numerical values of stresses that are typically observed by components in the majority of applications. Reference conditions are useful since they are the basis of the calculation of failure rate under any conditions by the application of stress models that take into account the actual operating conditions. This standard also gives guidance on how a database of component failure data can be constructed to provide failure rates that can be used with the included stress models. This edition includes the following significant technical changes with respect to the previous edition: - the addition of a number of component types and the updating of models for a large number of component types; - the addition of annexes on reliability prediction, sources of failure rate data and component classification information.
英文名称Electric components - Reliability - Reference conditions for failure rates and stress models for conversion