Name
Title | ||
|---|---|---|
An Adaptive Prognostic Approach via Nonlinear Degradation Modelling: Application to Battery Data |
Abstract | ||
|---|---|---|
Remaining useful life (RUL) estimation via degradation modelling is considered as one of the most central components in prognostics and health management. Current RUL estimation studies focus mainly on linear stochastic models and the results under nonlinear models are relatively limited in literature. Even in nonlinear degradation modelling, the estimated RUL is aimed at a population of systems of the same type or depend only on the current degradation observation. In this paper, an adaptive and nonlinear prognostic model is presented to estimate RUL using a system’s history of the observed data to date. Specifically, a general nonlinear stochastic process with a time-dependent drift coefficient is first adopted to characterize the dynamics and nonlinearity of the degradation process. In order to render the RUL estimation depend on the degradation history to date, a state space model is constructed and Kalman filtering is applied to update one key parameter in the drifting function through treating this parameter as an unobserved state variable. To update the hidden state and other parameters in the state space model simultaneously and recursively, the expectation maximization algorithm is used in conjunction with Kalman smoother to achieve this aim. The probability density function of the estimated RUL is derived with an explicit form and some commonly used results under linear models turn out to be its special cases. Finally, the implementation of the presented approach is illustrated by numerical simulations and an application for estimating the RUL of lithium-ion batteries is used to demonstrate the superiority of the method. |
Year | DOI | Venue |
|---|---|---|
2015 | 10.1109/TIE.2015.2393840 | Industrial Electronics, IEEE Transactions |
Keywords | Field | DocType |
degradation,battery,lifetime estimation,prediction method,prognostics and health management,estimation,stochastic processes,data models | Data modeling,Population,Prognostics,Linear model,Expectation–maximization algorithm,Control theory,Kalman filter,Stochastic modelling,State variable,Engineering | Journal |
Volume | Issue | ISSN |
PP | 99 | 0278-0046 |
Citations | PageRank | References |
25 | 0.95 | 34 |
Authors | ||
1 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Xiao-Sheng Si | 1 | 623 | 46.17 |