Rapid slewing and pointing of a flexible structure with embedded piezoceramics

Farshad Khorrami; Issam J. Zeinoun

doi:10.1117/12.152771

8 September 1993 Rapid slewing and pointing of a flexible structure with embedded piezoceramics

Farshad Khorrami, Issam J. Zeinoun

Proceedings Volume 1917, Smart Structures and Materials 1993: Smart Structures and Intelligent Systems; (1993) https://doi.org/10.1117/12.152771
Event: 1993 North American Conference on Smart Structures and Materials, 1993, Albuquerque, NM, United States

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.

Citation Download Citation

Farshad Khorrami and Issam J. Zeinoun "Rapid slewing and pointing of a flexible structure with embedded piezoceramics", Proc. SPIE 1917, Smart Structures and Materials 1993: Smart Structures and Intelligent Systems, (8 September 1993); https://doi.org/10.1117/12.152771

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