Important role of force/velocity characteristics in sensory-motor coordination for control design of object manipulation by a multi-fingered robot hand

• Published in: Robotica Vol. 22; no. 5; pp. 479 - 491
• Main Authors: Bae, J.-H., Arimoto, S.
• Format: Journal Article
• Language: English
• Published: Cambridge, UK Cambridge University Press 01.09.2004
• Subjects: Force-velocity characteristics; Gain tuning; Robot fingers; Rolling contact; Sensory feedback; Stable grasp; Rolling contact; Force-velocity characteristics; Sensory feedback; Gain tuning; Robot fingers; Stable grasp
• ISSN: 0263-5747; 1469-8668
• DOI: 10.1017/S0263574704000311

The purpose of this paper is in duplicate to present computer simulation results of concurrent grasp and object manipulation by a pair of three degrees of freedom (3-dof) robot fingers with rigid hemispherical finger-ends that induce rolling contacts with an object and propose a guidance of gain tuning. Although the existence of a class of sensory feedback signals that realize stable grasp and orientation control of the object concurrently has been shown theoretically, the problem of tuning of their feedback gains has not yet been solved. This paper proposes a guideline for tuning sensory feedback gains by deriving a relationship between the object mass and damping coefficients of finger motions through analyzing the overall fingers-object dynamics and taking into account the well-known force/velocity characteristics of human muscle in muscle physiology.