Title

Automated Design Parameter Selection for Neural Networks Solving Coupled Partial Differential Equations With Discontinuities

Department

Mechatronics Engineering

Document Type

Article

Publication Date

11-15-2012

Abstract

The length factor artificial neural network (ANN) method for solving coupled systems of partial differential equations (DEs) is unique among ANN methods in that the approximate solution exactly satisfies boundary conditions (BCs) on arbitrary geometries regardless of the ANN output. Besides removing the BC constraint from the optimization process, this property allows the method to accurately solve problems with discontinuous BCs despite the continuous nature of ANNs. An automated design parameter selection process is developed to choose a single ANN from an ensemble comprising numerous combinations of design parameters and random starting weights and biases. The selection is made completely independently of the human designer by comparing the magnitude and uniformity of each approximate solution's error in satisfying the DE(s). The automated selection process successfully chooses a solution with error on the same order of magnitude as the best solution in the ensemble. The resulting approximations provide low error solutions for the three different thermal-fluid science example problems explored, including the Navier–Stokes equations.

Journal

Journal of the Franklin Institute

Journal ISSN

0016-0032

Volume

350

Issue

2

First Page

300

Last Page

317

Digital Object Identifier (DOI)

10.1016/j.jfranklin.2012.11.003