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Remaining useful life prediction for hard failures using joint model with extended hazard

机译:使用具有扩展危害的联合模型对硬故障的剩余使用寿命预测

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摘要

In this paper, we investigate a joint modeling method for hard failures where both degradation signals and time-to-event data are available. The mixed-effects model is used to model degradation signals, and extended hazard model is used for the time-to-event data. The extended hazard is a general model which includes two well-known hazard rate models, the Cox proportional hazards model and accelerated failure time model, as special cases. A two-stage estimation approach is used to obtain model parameters, based on which remaining useful life for the in-service unit can be predicted. The performance of the method is demonstrated through both simulation studies and a real case study.
机译:在本文中,我们研究了一种硬故障的联合建模方法,该方法既可以使用降级信号,又可以使用事件发生时间数据。混合效应模型用于对降级信号进行建模,而扩展危害模型用于事件发生时间数据。作为特殊情况,扩展的危害是一个通用模型,其中包括两个众所周知的危害率模型,即Cox比例危害模型和加速故障时间模型。使用两阶段估计方法来获得模型参数,基于该模型参数可以预测在役单元的剩余使用寿命。通过仿真研究和实际案例研究证明了该方法的性能。

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