Systems Engineering and Electronics ›› 2020, Vol. 42 ›› Issue (6): 1410-1416.doi: 10.3969/j.issn.1001-506X.2020.06.27

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Online prediction method of remaining useful lifetime for implicit nonlinear degradation equipment

Zhongyi CAI(), Zezhou WANG*(), Xiaofeng ZHANG(), Yan LI()   

  1. Equipment Management & UAV Engineering College, Air Force Engineering University, Xi'an 710051
  • Received:2019-11-16 Online:2020-06-01 Published:2020-06-01
  • Contact: Zezhou WANG E-mail:afeuczy@163.com;wzz_4202@qq.com;646297491@qq.com;afeuly@163.com
  • Supported by:
    国家自然科学基金(71901216);中国博士后科学基金(2017M623415)

Abstract:

Stochastic degradation equipment will produce the problems of nonlinearity and implicitness in actual operation, which will cause uncertainty on the remaining useful lifetime (RUL) prediction. Existing RUL prediction methods have not systematically studied implicit nonlinear degradation modeling and corresponding RUL distribution. The Wiener process is used to build the implicit dual-nonlinear degradation model. The online monitoring data of equipment is used to update the posterior distribution of implicit states. By using the full probability formula, the RUL distribution is derived based on the first hitting time (FHT) distribution. The simulation parameters are set based on the degradation data of the laser, which verifies the accuracy and rationality of the proposed method.

Key words: remaining useful lifetime(RUL) prediction, Wiener process, degradation modeling, measurement error, dual-nonlinearity

CLC Number: 

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