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Título del libro: Proceedings Of The Ieee International Conference On Control Applications
Título del capítulo: Adaptive compensation of dynamic friction in an industrial robot

Autores UNAM:
JUAN CARLOS MARTINEZ ROSAS; LUIS AGUSTIN ALVAREZ ICAZA LONGORIA;
Autores externos:

Idioma:
Inglés
Año de publicación:
2008
Palabras clave:

Difference equations; Differential equations; Differentiation (calculus); Dynamic loads; Friction; Industrial robots; Nonlinear equations; Robotics; Tribology; Coulomb friction; Dynamic friction models; Lugre friction model; Stribeck effect; Dynamic models


Resumen:

A new dynamic model to describe joint friction in a industrial robot is presented. This model is an extension of the popular LuGre dynamic friction model. However, the description of the Stribeck effect is modeled with a first order nonlinear differential equation. This yields a second order dynamic friction model that still preserves the intuitive base of previous models, reproduces the pseudo-steady state behavior and offers the same input-output properties. The advantage with respect to other dynamic friction models is in the possibility of identifying all the relevant parameters. This particularly important when this parameters change with time making it difficult to continuously calibrate the model. The validity of a dynamic friction adaptive compensation scheme is verified by means of experimental results. © 2008 IEEE.


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