Applying neural fields to the stability problem of an inverted pendulum as a simple biped walking model

  • Authors:
  • Juan Figueredo;Jonatan Gómez

  • Affiliations:
  • Department of Systems and Industrial Engineering, National University of Colombia, Bogotá, Colombia;Department of Systems and Industrial Engineering, National University of Colombia, Bogotá, Colombia

  • Venue:
  • IJCNN'09 Proceedings of the 2009 international joint conference on Neural Networks
  • Year:
  • 2009

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Abstract

This paper proposes a control architecture based on neural fields for a relatively complex and unstable dynamical system. The neural field model is capable of addressing goal-based planning problems and has properties, like embedding in an Euclidean space and linear stability, that potentially make it well-fitted for dynamic control tasks. The neural field control architecture is tested with the inverted pendulum problem. The cart-and-pole inverted pendulum is used as a simple biped walking model, where the cart models the center of pressure and the pole models the center of mass. The parameterized (i.e, non-evolved) neural field control architecture is compared against an evolved recurrent neural field controller applied to the same control task. The non-evolved neural field controller performs, in the simulation, better than the evolved recurrent neural network controller. Furthermore, the neural field has a spatial representation which allows an easy visualization of its field potentials.