In this paper, an adaptive robust controller of assistive robotic device using a dual twisted-string actuation devices was synthesized. With the consideration of system uncertainties, nonlinear dynamics, and operational dead-zones, a compensation strategy for high accuracy motion control is integrated in the controller. The proposed controller not only accounts for the tracking performance but also minimizes synchronization errors of the dual-axial system. A test platform was designed to validate the performance of the proposed ARC controller, which can achieve tracking performance of individual twisted-string actuation and minimize the synchronization error simultaneously. The performance of the proposed ARC controller was compared with the outcome of regular PID controller as well.
Related links
Details
Title
Controller synthesis for assistive robotic device using twisted-string actuation
Publication Details
Proceedings of the 2015 American Control Conference (ACC), pp.2248-2253
Resource Type
Conference proceeding
Conference
American Control Conference (ACC) (Chicago, Illinois, USA, 2015)
Publisher
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Series
The Institute of Electrical and Electronics Engineers, Inc. (IEEE) Conference Proceedings
Grant note
The authors gratefully acknowledge NASA West Virginia Space Grant Consortium for the financial support of this project.