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Quasiperiodic oscillations in robot dynamics

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Abstract

Delayed robot systems, even of low degree of freedom, can produce phenomena which are well understood in the theory of nonlinear dynamical systems, but hardly ever occur in simple mechanical models. To illustrate this, we analyze the delayed positioning of a single degree of freedom robot arm which leads to an infinite dimensional dynamical system. Restricting the dynamics to a four dimensional center manifold, we show that the system undergoes a codimension two Hopf bifurcation for an infinite set of parameter values. This provides a mechanism for the creation of two-tori in the phase space and gives a theoretical explantion for self-excited quasiperiodic oscillations of force controlled robots. We also compare our results with experimental data.

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Authors and Affiliations

  1. Department of Applied Mechanics, Technical University of Budapest, H-1521, Budapest, Hungary

    G. Stépán

  2. Division of Applied Mathematics, Brown University, 02912, Providence, RI, U.S.A.

    G. Haller

Authors
  1. G. Stépán
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  2. G. Haller
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Stépán, G., Haller, G. Quasiperiodic oscillations in robot dynamics. Nonlinear Dyn 8, 513–528 (1995). https://doi.org/10.1007/BF00045711

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  • DOI: https://doi.org/10.1007/BF00045711

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