The Transient Impulse Response Modeling Method and the Local Polynomial Method for Nonparametric System Identification

Gevers, Michel;Hägg, Per;Hjalmarsson, Hakan;Pintelon, Rik;Schoukens, Johan
(2012) 16th IFAC Symposium on System Identification (SYSID 2012) — Location: Brussels, Belgium (11.July.2012)

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Authors
  • Gevers, MichelUCLouvain
    Author
  • Hägg, PerKTH
    Author
  • Hjalmarsson, HakanKTH
    Author
  • Pintelon, RikVUB
    Author
  • Schoukens, JohanVUB
    Author
Abstract
This paper analyzes two recent methods for the nonparametric estimation of the Frequency Response Function (FRF) from input-output data using Prediction Error identification. Such FRF estimate can be the main goal of the identification exercise, or it can be a tool for the computation of a nonparametric estimate of the noise spectrum. We show that the choice of the method depends on the signal to noise ratio and on the objective. The method that delivers the best FRF estimate may not deliver the best estimate of the noise spectrum. Our theoretical analysis is illustrated by simulations.
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Gevers, M., Hägg, P., Hjalmarsson, H., Pintelon, R., & Schoukens, J. (2012). The Transient Impulse Response Modeling Method and the Local Polynomial Method for Nonparametric System Identification. System Identification. Published. 16th IFAC Symposium on System Identification (SYSID 2012), Brussels, Belgium. https://doi.org/10.3182/20120711-3-BE-2027.00359