Hierarchical fractional-order Hammerstein system identification

Soumaya Marzougui, Asma Atitallah, Saida Bedoui and Kamel Abderrahim

International Journal of Systems Science, 2021, vol. 52, issue 12, 2505-2517

Abstract: For the fractional-order Hammerstein system with white noise, the difficulty of identification is that the parameters of the linear and the nonlinear blocks and the fractional order are unknown and the intermediate variable and the states are unmeasurable. To overcome this difficulty, we transform the system from an input nonlinear pseudo-state-space system to an input–output representation and we develop an algorithm based on the Recursive Least Squares, the Levenberg–Marquardt and the Auxiliary Model Principle. The convergence of the identified parameters is studied. The performance of the proposed algorithm are tested by two numerical examples.

Date: 2021
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DOI: 10.1080/00207721.2021.1891324

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