Frequency Domain System Identification Toolbox for MATLAB: Improvements and New Possibilities

Abstract Frequency domain system identification has been rapidly developing during the past years. The comprehensive Frequency Domain System Identification (FDIDENT) Matlab toolbox is a successful implementation of the methods of the whole identification procedure. Its core is a weighted least squares estimate of parametric transfer function models, maybe with a delay, but also offers help for nonparametric transfer function identification. It contains tools for excitation signal design, data preprocessing, parameter estimation, model and error presentation, model validation, simulation, archivation and documentation. This paper describes the latest developments of the toolbox, and illustrates them on a few examples. Finally, the future plans are briefly summarized.

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