多种退化机理作用下的产品可靠性建模

针对受不同因素影响导致性能逐步退化的产品, 首先对造成性能退化产品失效的退化机理进行分析, 将产品性能指标退化看成是由连续性影响因素和离散性影响因素共同作用的结果。其次, 基于扩散过程和累积失效理论, 建立多种退化机理作用下产品性能指标退化模型, 给出模型中参数的估计方法和性能退化产品可靠度估计方法。最后, 通过对某测深设备零位电压数据和液力耦合器振动幅值测量数据进行分析, 说明所提方法是可行的和有效的。

Reliability modeling of products based on multiple degradation mechanism

For the problem that the products performance is gradually degraded due to different factors, firstly, the degradation mechanism of product failure caused by the performance degradation is analyzed. The products performance indicator are degenerated by both the digression factors that are continuance influencing factors and discreteness influencing factors. Secondly, the degradation model of products performance indicator under the action of multiple degradation mechanism is set up based on the diffusion process and accumulative failure theory. The estimation methods of the model's parameters and the reliability assessment of the performance degradation products are performed. Finally, the data of drift voltage departing from zero of acoustic echosounder and measurement data of vibration amplitude of hydraulic coupler are studied, which demonstrates that this method is feasible and effective.