Rapid slewing and pointing of a flexible structure with embedded piezoceramics

Farshad Khorrami, Issam J. Zeinoun

Research output: Contribution to journalConference articlepeer-review


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 will be 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 realtime 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.

Original languageEnglish (US)
Pages (from-to)25-36
Number of pages12
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - Sep 8 1993
EventSmart Structures and Materials 1993: Smart Structures and Intelligent Systems - Albuquerque, United States
Duration: Feb 1 1993Feb 4 1993

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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