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Design and motion control of a cable-driven dexterous robotic arm

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6 Author(s)
Lum, G.Z. ; Sch. of Mech. & Aerosp. Eng., Nanyang Technol. Univ., Singapore, Singapore ; Mustafa, S.K. ; Lim, H.R. ; Lim, W.B.
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Robots with hyper degrees of freedom motion are highly flexible, hence they are the ideal candidates to work in highly-confined spaces. These dexterous robotic arms are classified into two categories, i.e., discrete and continuum. As the weight of the discrete robots is a major concern, this paper discusses about the possibility of reducing their weight by replacing the heavy actuators with light cables. The proposed cable-driven robot consists of a series of identical parallel-structured modules connected to one another via universal joints. Experimental results showed that the cables have demonstrated a good step response with no steady-state errors and a fast settling time of 0.042 seconds. By using the kinematics formulations analysed in this paper, position control has been successfully implemented on a two-module cable-driven prototype. This allows the robot to be controlled in a co-ordinated manner while maintaining a smooth trajectory.

Published in:

Sustainable Utilization and Development in Engineering and Technology (STUDENT), 2010 IEEE Conference on

Date of Conference:

20-21 Nov. 2010