Parameter identification of Hammerstein systems containing backlash operators with arbitrary-shape parametric borders |
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Authors: | F Giri Y Rochdi A Brouri FZ Chaoui[Author vitae] |
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Affiliation: | aGREYC Lab, UMR CNRS, University of Caen, Caen, France |
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Abstract: | A two-stage parameter identification method is developed for Hammerstein systems containing backlash nonlinearities bordered by parametric arbitrary-shape lines. In the first stage, a persistently exciting input is designed so that the linear subsystem can be made decoupled from the nonlinear element. Therefore, linear subsystem identification is coped with using a least squares estimator enjoying consistency, due to input persistent excitation. Then, the backlash parameters are estimated using appropriate periodic exciting signals and consistent parameter estimators. |
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Keywords: | System identification Hammerstein model Backlash operators Parametric borders |
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