Analysis of the errors in the modelling of manipulators with Gaussian RBF neural networks

  • Authors:
  • Juan Ignacio Mulero-Martínez

  • Affiliations:
  • Departamento de Ingeniería de Sistemas y Automática, Universidad Politécnica de Cartagena, Campus Muralla del Mar, Cartagena 30203, Spain

  • Venue:
  • Neurocomputing
  • Year:
  • 2009

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Abstract

Dynamic modelling plays an important role in the design of controllers for robot manipulators. The presence of uncertainties such as those from unknown parameters makes the structured network modelling a powerful tool. In this sense, static neural networks based on the Kronecker product are introduced and some interesting properties connected to the dynamics are exploited. The main result of this work is the mathematical determination of the bandwidth regarding with nonlinear terms of the dynamics equations. In order to follow a methodological approach that is consistent with the sampling theorem, it is necessary to treat the dynamics in the context of multivariate Fourier analysis. Finally, the selection of design parameters is crucial in the performance of the system, making a tremendous influence on both the boundedness of the weights and the approximation errors so that explicit formulae are provided to treat with this topic.