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Diagnosing Newton’s Solver Convergence Failures in the Initialization of Modelica Models

Year: 2025

Type: conference-paper

Abstract: The convergence failure of iterative Newton solvers duringthe initialization of Modelica models is a seriousshow-stopper, particularly for inexperienced users. Thispaper presents the implementation in the OpenModelica toolof methods presented by two of the authors in a previouspaper, to help diagnosing and resolving these convergencefailure by providing ranked lists of potentially criticalstart attributes that might need to be fixed in order tosuccessfully achieve convergence. The method also provideslibrary developers with useful information about criticalnonlinear equations, that could be replaced by equivalent,less nonlinear ones, or approximated by homotopy for morerobust initialization.

Source: Linköping electronic conference proceedings

DOI: 10.3384/ecp218109

Authors: Francesco Casella, Bernhard Bachmann, Karim Abdelhak, Philip Hannebohm, Teus Van der Stelt

Institutions: Politecnico di Milano, Hochschule Bielefeld, Asymptote (United Kingdom)

Language: English

Topic: Modeling and Simulation Systems

Subfield: Computational Theory and Mathematics

Field: Computer Science

Domain: Physical Sciences

Open Access status: hybrid

OpenAlex ID: W4415503868

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