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Parametric identification of transfer functions from frequency response data

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2 Author(s)
Banos, A. ; Dept. de Inf. y Sistemas, Murcia Univ., Spain ; Gomez, F.

The problem of parametric identification is addressed using a cost function that weights the difference between the Bode diagrams of a model and its data. This article presents a MATLAB program for parametric estimation (AFT=Ajustamiento de Funcions de Transferencia) that includes single rules for the estimation of parameters from low- and high-frequency response data. The rest of the parameters are computed using an adequate optimisation technique for the problem. In addition, the article develops a heuristic identification method based on the experience in using AFT. Finally, a practical example is given.<>

Published in:

Computing & Control Engineering Journal  (Volume:6 ,  Issue: 3 )