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System Identification of a Vertical Riser Model with Echo State Networks

on Thu, 09/29/2016 - 19:51
TitleSystem Identification of a Vertical Riser Model with Echo State Networks
Publication TypeConference Paper
Year of Publication2015
AuthorsAntonelo EA, Camponogara E, Plucenio A
Conference Name2nd IFAC Workshop on Automatic Control in Offshore Oil and Gas Production
Abstract

System identification of highly nonlinear dynamical systems, important for reducing time complexity in long simulations, is not trivial using more traditional methods such as recurrent neural networks (RNNs) trained with back-propagation through time. The recently introduced Reservoir Computing (RC)∗ approach to training RNNs is a viable and powerful alternative which renders fast training and high performance. In this work, a single Echo State Network (ESN), a flavor of RC, is employed for system identification of a vertical riser model which has stationary and oscillatory signal behaviors depending of the production choke opening input variable. It is shown experimentally that these different behaviors are learned by constraining the high-dimensional reservoir states to attractor subspaces in which the specific behavior is represented. Further experiments show the stability of the identified system.