Title:
MULTI-MODE DEGRADATION PROCESS MODELLING AND REMAINING SERVICE LIFE PREDICTION METHOD
Document Type and Number:
WIPO Patent Application WO/2019/174142
Kind Code:
A1
Abstract:
A multi-mode degradation process modelling and remaining service life prediction method, belonging to the technical field of health management. The method comprises the following steps: firstly, collecting degradation data sampled at equal intervals; performing change point detection on the degradation data; using a degradation rate as a feature to cluster degraded segments obtained by means of change point segmentation; building a degradation model containing mode switching, wherein the model switching is described by a continuous-time Markov chain; estimating a Hurst index of a degradation process by using a quadratic variation based approach; using a maximum likelihood method to respectively estimate a state transition rate matrix of the Markov chain and a drift term coefficient in each mode, and a diffusion term coefficient; using a Monte Carlo algorithm to obtain the distribution obeyed by the drift term under the influence of state switching in a future period of time; and then obtaining the distribution of the remaining service life under a given threshold value.
Inventors:
ZHOU DONGHUA (CN)
CHEN MAOYIN (CN)
ZHANG HANWEN (CN)
ZHANG HAIFENG (CN)
LI MINGLIANG (CN)
LU XIAO (CN)
CHEN MAOYIN (CN)
ZHANG HANWEN (CN)
ZHANG HAIFENG (CN)
LI MINGLIANG (CN)
LU XIAO (CN)
Application Number:
PCT/CN2018/090928
Publication Date:
September 19, 2019
Filing Date:
June 13, 2018
Export Citation:
Assignee:
UNIV SHANDONG SCIENCE & TECH (CN)
International Classes:
G01M13/00; G06F17/50
Foreign References:
| CN107480442A | 2017-12-15 | |||
| CN106021826A | 2016-10-12 | |||
| CN103678858A | 2014-03-26 | |||
| CN102789545A | 2012-11-21 | |||
| CN101870076A | 2010-10-27 | |||
| US20070029974A1 | 2007-02-08 | |||
| CN107358347A | 2017-11-17 |
Attorney, Agent or Firm:
QINGDAO ZHIDILINGCHUANG PATENT AGENCY CO., LTD (CN)
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