This paper aims to describe a new identification method for Hammerstein systems relying on the framework of basisfunctions approximation in order to obtain an adequate model for the nonlinear static component. The sp...
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ISBN:
(纸本)9781467345057
This paper aims to describe a new identification method for Hammerstein systems relying on the framework of basisfunctions approximation in order to obtain an adequate model for the nonlinear static component. The specific coefficients of the basisfunctions approximation and also the parameters of the linear dynamic component are estimated using a nonlinear least squares method based on a modified version of Gauss-Newton algorithm. An algorithm is introduced based on wavelet multiresolution analysis that returns a low complexity approximation of the nonlinear component built on a grid hierarchy using adaptive bases. Such bases provides a powerful means to detect local singularities and often lead to quite simple refinement strategies. Finally, we present some numerical results for our method that show its efficiency.
This paper aims to describe two identification methods for Hammerstein systems. Both methods are design to approximate the nonlinear component by using families of simpler functions. The first algorithm combines linea...
详细信息
ISBN:
(纸本)9780769549804
This paper aims to describe two identification methods for Hammerstein systems. Both methods are design to approximate the nonlinear component by using families of simpler functions. The first algorithm combines linear least squares with PSO to approximate both linear and nonlinear component parameters, whilst the latter redesigns the unknown coefficients approximation problem into a nonlinear least squares one and uses a modified version of Gauss-Newton algorithm to solve it. A comparison between the two methods is carried out.
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