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Proceedings Paper

Rapid slewing and pointing of a flexible structure with embedded piezoceramics
Author(s): Farshad Khorrami; Issam J. Zeinoun
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Paper Abstract

Active control of flexible multi-body systems and structures through utilization of smart materials is considered in this paper. Specifically, utilization of piezoceramics for sensing and actuation is investigated. Experimental setups have been developed at Control/Robotics Research Laboratory (CRRL) to study modeling issues and control design approaches for flexible structures with embedded (or surface-mounted) piezoceramics. In this paper, experimental results on vibration suppression for a clamped-free beam and a rotating flexible beam with surface mounted piezoceramics are presented. We compare and contrast the analytical modeling and control design with the experimental results. It is shown that piezoceramics substantially improve the performance of the systems under consideration. The advocated approaches for control designs are decentralized frequency shaping and self-tuning adaptive controllers. The self-tuning controller is based on identification of the system dynamics in frequency domain utilizing Fast Fourier Transform (FFT). The real-time computing power to evaluate FFTs is provided by digital signal processing boards (TMS320C30 based). Addition of a self-tuning regulator enhances the performance and the robustness of the controlled system to parameter variations.

Paper Details

Date Published: 8 September 1993
PDF: 12 pages
Proc. SPIE 1917, Smart Structures and Materials 1993: Smart Structures and Intelligent Systems, (8 September 1993); doi: 10.1117/12.152771
Show Author Affiliations
Farshad Khorrami, Polytechnic Univ. (United States)
Issam J. Zeinoun, Polytechnic Univ. (United States)

Published in SPIE Proceedings Vol. 1917:
Smart Structures and Materials 1993: Smart Structures and Intelligent Systems
Nesbitt W. Hagood; Gareth J. Knowles, Editor(s)

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