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On Control-specific Derivation of Affine Takagi-Sugeno Models from Physical Models: Assessment Criteria and Modeling Procedure



Publication Details
Authors:
Dürrbaum, A.
Place:
Paris, France
Publication year:
2011
Pages range:
23-30
Book title:
CICA 2011 IEEE Symposium on Computational Intelligence in Control and Automation

Abstract
Models are commonly derived and their performance is assessed wrt. minimal prediction error on a closed data set. However, if no perfect model can be used, the degrees of freedom in modeling should be used to adjust the model to application-specific metrics. For model-based controller design, control-oriented performance metrics (e.g. performance wrt. to control-critical properties) are important, but not primarily prediction (i.e. prognosis- and simulation-oriented) ones. This motivates the derivation of control-specific models. The contribution introduces structured and quantitative measures on "model suitability for control" for the class of affine dynamic Takagi-Sugeno models. A method is suggested that derives control-specific dynamic models from a physical model given as a set of nonlinear differential equations. Within a case study, the proposed method demonstrates its significance: Using control-specific models improves control performance metrics such as set-point tracking quality, stability region and energy efficiency.


Keywords
modeling for control, Nonlinear dynamic modeling, Takagi-Sugeno systems


Authors/Editors

Last updated on 2019-25-07 at 16:49