title: A New Multivariate Approach for Prognostics Based on Extreme Learning Machine and Fuzzy Clustering.
abstract: Prognostics is a core process of prognostics and health management (PHM) discipline, that estimates the remaining useful life (RUL) of a degrading machinery to optimize its service delivery potential. However, machinery operates in a dynamic environment and the acquired condition monitoring data are usually noisy and subject to a high level of uncertainty/unpredictability, which complicates prognostics. The complexity further increases, when there is absence of prior knowledge about ground truth (or failure definition). For such issues, data-driven prognostics can be a valuable solution without deep understanding of system physics. This paper contributes a new data-driven prognostics approach namely, an "enhanced multivariate degradation modeling," which enables modeling degrading states of machinery without assuming a homogeneous pattern. In brief, a predictability scheme is introduced to reduce the dimensionality of the data. Following that, the proposed prognostics model is achieved by integrating two new algorithms namely, the summation wavelet-extreme learning machine and subtractive-maximum entropy fuzzy clustering to show evolution of machine degradation by simultaneous predictions and discrete state estimation. The prognostics model is equipped with a dynamic failure threshold assignment procedure to estimate RUL in a realistic manner. To validate the proposition, a case study is performed on turbofan engines data from PHM challenge 2008 (NASA), and results are compared with recent publications.
authors: Kamran
authors: K
authors: Javed
authors: Rafael
authors: R
authors: Gouriveau
authors: Noureddine
authors: N
authors: Zerhouni
mesh_terms: D000465:Algorithms; D016000:Cluster Analysis; D004738:Engineering; D017143:Fuzzy Logic; D000069550:Machine Learning; D008962:Models, Theoretical; D015999:Multivariate Analysis