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JRM Vol.10 No.3 pp. 184-190
doi: 10.20965/jrm.1998.p0184
(1998)

Paper:

Deformation Control of Elastic Object by Robot Arm – High-Precision Deformation Control by Adaptive Feed-forward Control –

Hiroyuki Kojima*, Masakazu Kamei** and Tsuneo Akuto**

*Department of Mechanical System Engineering, Gunma Univcrsity, Kiryu, Gunma 376-8515, Japan

**MITSUBA Corpolation, Kiryu, Gunma 376-8555, Japan

Received:
May 6, 1998
Accepted:
June 5, 1998
Published:
June 20, 1998
Keywords:
Mechatronics and Robotics, Adaptive Control, Digital control, Deforming control, Flexible Material, OnLine Identification, Zero phase error tracking control
Abstract

This paper derives the equations of motion of a horizontal three-link robot arm contacting an elastic object, then proposes deformation control for the elastic object by the robot arm. This deformation control involves feedback control of joint angles, feedforward control by robot arm dynamics, and adaptive feedforward control for unknown elastic object dynamics. An adaptive feedforward control law is devised using an online parameter identification algorithm based on the least squares method, zero phase error tracking control theory, and the Jacobian matrix of the robot arm. Numerical simulation and experimental results confirmed that deformation control error by the proposed adaptive control rapidly decreases with the passing of time.

Cite this article as:
Hiroyuki Kojima, Masakazu Kamei, and Tsuneo Akuto, “Deformation Control of Elastic Object by Robot Arm – High-Precision Deformation Control by Adaptive Feed-forward Control –,” J. Robot. Mechatron., Vol.10, No.3, pp. 184-190, 1998.
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