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Authors: Nelio Pastor ; Juan J. Flores ; Claudio R. Fuerte and Felix Calderón

Affiliation: Universidad Michoacana de San Nicolás de Hidalgo, División de Estudios de Postgrado, Facultad de Ingeniería Eléctrica, Mexico

Keyword(s): Time-varying systems, LTI systems, Genetic Algorithms, Frozen-time approximation, Gradient optimization, System Identification.

Related Ontology Subjects/Areas/Topics: Informatics in Control, Automation and Robotics ; Signal Processing, Sensors, Systems Modeling and Control ; System Identification ; Time Series and System Modeling

Abstract: A method for structural and parameter identification of a slowly time-varying systems is proposed. The frozen-time method is used in this analysis. By means of this method we obtain consecutive LTI models, which are identified in consecutive discrete instants using the Qualitative System Identification (QSI) Algorithm. The proposed algorithm models the behavior of the ODE’s coefficients means of polynomial functions. The algorithm models the variations of those coefficients though polynomials. An optimal model is obtained using Genetic Algorithms. The algorithm starts with a polynomial of second degree and tries to fit these polynomials, to the variations of the coefficients. If the degree of the polynomials is not enough it increases and repeats the process until achieving a good fit. The system was tested with the identification of a controlled experiment in a power systems laboratory.

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Paper citation in several formats:
Pastor, N.; J. Flores, J.; R. Fuerte, C. and Calderón, F. (2006). IDENTIFICATION OF SLOWLY TIME-VARYING SYSTEMS BASED ON THE QUALITATIVE FEATURES OF TRANSIENT RESPONSE A FROZEN-TIME APPROACH. In Proceedings of the Third International Conference on Informatics in Control, Automation and Robotics - Volume 2: ICINCO; ISBN 978-972-8865-61-0; ISSN 2184-2809, SciTePress, pages 55-60. DOI: 10.5220/0001218700550060

@conference{icinco06,
author={Nelio Pastor. and Juan {J. Flores}. and Claudio {R. Fuerte}. and Felix Calderón.},
title={IDENTIFICATION OF SLOWLY TIME-VARYING SYSTEMS BASED ON THE QUALITATIVE FEATURES OF TRANSIENT RESPONSE A FROZEN-TIME APPROACH},
booktitle={Proceedings of the Third International Conference on Informatics in Control, Automation and Robotics - Volume 2: ICINCO},
year={2006},
pages={55-60},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0001218700550060},
isbn={978-972-8865-61-0},
issn={2184-2809},
}

TY - CONF

JO - Proceedings of the Third International Conference on Informatics in Control, Automation and Robotics - Volume 2: ICINCO
TI - IDENTIFICATION OF SLOWLY TIME-VARYING SYSTEMS BASED ON THE QUALITATIVE FEATURES OF TRANSIENT RESPONSE A FROZEN-TIME APPROACH
SN - 978-972-8865-61-0
IS - 2184-2809
AU - Pastor, N.
AU - J. Flores, J.
AU - R. Fuerte, C.
AU - Calderón, F.
PY - 2006
SP - 55
EP - 60
DO - 10.5220/0001218700550060
PB - SciTePress