M. Hashimoto et Y. Kiyosawa, EXPERIMENTAL-STUDY ON TORQUE CONTROL USING HARMONIC DRIVE BUILT-IN TORQUE SENSORS, Journal of robotic systems, 15(8), 1998, pp. 435-445
Citations number
11
Categorie Soggetti
Robotics & Automatic Control","Robotics & Automatic Control
We have proposed the practical torque sensor which utilizes elasticity
of harmonic drives. The sensing technique provides joint torque sensi
ng without reducing stiffness of the robot and changing the mechanical
structure of the joints. In this article, we examine experimentally t
he characteristics of joint torque control using this torque sensor. T
hree types of torque control laws are implemented with a one-link arm
to find a control method which provides excellent friction reduction a
nd dynamic response in joint torque. The experimental results of joint
torque control show that the torque sensor is very useful to compensa
te the nonlinear friction. Furthermore the torque control is effective
to improve the accuracy of the motion control at low velocity and to
suppress the vibration caused by the joint flexibility. (C) 1998 John
Wiley & Sons, Inc.