An XML representation of DAE systems obtained from continuous-time Modelica models

Abstract

This contribution outlines an XML format for representa-tion of differential-algebraic equations (DAE) models ob-tained from continuous time Modelica models and possibly also from other equation-based modeling languages. The purpose is to offer a standardized model exchange format which is based on the DAE formalism and which is neutral with respect to model usage. Many usages of models go be-yond what can be obtained from an execution interface of-fering evaluation of the model equations for simulation pur-poses. Several such usages arise in the area of control en-gineering, where dynamic optimization, Linear Fractional Transformations (LFTs), derivation of robotic controllers, model order reduction, and real time code generation are some examples. The choice of XML is motivated by its de facto standard status and the availability of free and effi-cient tools. Also, the XSLT language enables a convenient specification of the transformation of the XML model rep-resentation into other formats.