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Inicio Revista Iberoamericana de Automática e Informática Industrial RIAI Análisis del deslizamiento en el punto de apoyo de un robot bípedo de 5-gdl
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Vol. 10. Núm. 2.
Páginas 133-142 (abril - junio 2013)
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Vol. 10. Núm. 2.
Páginas 133-142 (abril - junio 2013)
Open Access
Análisis del deslizamiento en el punto de apoyo de un robot bípedo de 5-gdl
Sliding analysis on the support point of a 5-dof biped robot
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4754
J.A. Vazquez
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javazquez@cinvestav.mx

Autor para correspondencia.
, M. Velasco-Villa
CINVESTAV-IPN, Departamento de Ingeniería Eléctrica Sección de Mecatrónica, A.P. 14-740, 07000, México D.F., México
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En los análisis de los diversos problemas que la locomoción bípeda representa, es común la consideración de hipótesis específicas para evaluar el desempeño de un robot en un ambiente de trabajo particular. Una de estas hipótesis consiste en omitir un eventual deslizamiento, que puede existir entre los puntos o superficies de contacto de un robot bípedo con el suelo. Aunque en situaciones prácticas esta dinámica puede ser despreciable, la velocidad relativa generada por un posible deslizamiento depende tanto de las características de fricción en el punto de contacto, como de la misma dinámica del sistema. Este trabajo se enfoca en el análisis de la dinámica de deslizamiento de un robot bípedo en su punto de apoyo durante la ejecución de su ciclo de marcha. Se considera un robot sólo con articulaciones de rodilla y cadera en cada pata, por lo que, dada la ausencia de articulación de tobillo, el contacto con la superficie es considerado puntual. Se desarrollan algunas expresiones analíticas para determinar las condiciones del fenómeno de deslizamiento al considerar un grado de libertad adicional de tipo traslacional en el extremo de la pata de apoyo.

Palabras clave:
Robótica
Fricción viscosa
Modelo dinámico
Control basado en modelo
Abstract

Most of the works which deal with biped robots, consider certain assumptions to evaluate their strategies in order to get a specific objective. One of these assumptions considers a non slip condition, which implies that the contact point with the walking surface does not move along the walking axis. Although, in realistic terms, this movement could be negligible, it depends on the friction characteristics between the points of contact. This work is focused on the slip dynamic analysis of the support contact point and leads to analytical expressions to determine conditions of the slip phenomenon. This is done by considering an additional degree of freedom at the end of the supporting leg in the walking cycle.

Keywords:
Robotics
Viscous friction
Model based control
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