Published in

Hindawi, Journal of Robotics, (2013), p. 1-14, 2013

DOI: 10.1155/2013/256364

Links

Tools

Export citation

Search in Google Scholar

A Comparison between Two Force-Position Controllers with Gravity Compensation Simulated on a Humanoid Arm

This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

Full text: Download

Green circle
Preprint: archiving allowed
Green circle
Postprint: archiving allowed
Green circle
Published version: archiving allowed
Data provided by SHERPA/RoMEO

Abstract

In this paper the authors propose a comparison between two force-position controllers with gravity compensation simulated on the DEXTER bioinspired robotic arm. The two controllers are both constituted by an internal Proportional-Derivative (PD) closed-loop for the position control. The force control of the two systems is composed by an external proportional (P) closed-loop for one system (P system) and by an external proportional-integrative (PI) closed-loop for the other system (PI system). The simulation tests performed with the two systems on a planar representation of the DEXTER, an eight DOF bioinspired arm, shown that by varying the stiffness of the environment, with a correct setting of parameters, both systems ensure the achievement of the desired force regime and with great precision the desired position. The two controllers do not have large differences in performance when interacting with a lower stiffness environment. In case of an environment with greater rigidity the PI system is more stable. The subsequent implementation of these control systems on the DEXTER robotic bio-inspired arm give guidance on the design and control optimisation of the arms of the humanoid robot named SABIAN.