Piezoelectric displacement feedback control with time delay

James M. Sloss; Sarp Adali; Ibrahim S. Sadek; John C. Bruch Jr.

doi:10.1117/12.350115

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4 June 1999 Piezoelectric displacement feedback control with time delay

James M. Sloss, Sarp Adali, Ibrahim S. Sadek, John C. Bruch Jr.

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Proceedings Volume 3667, Smart Structures and Materials 1999: Mathematics and Control in Smart Structures; (1999) https://doi.org/10.1117/12.350115
Event: 1999 Symposium on Smart Structures and Materials, 1999, Newport Beach, CA, United States

Abstract

Distributed vibration control of an elastic beam is analyzed. The elastic beam is sandwiched between two thin layers of mono-axially oriented piezoelectric material. One layer acts as a distributed sensor while the other behaves as an actuator. A displacement feedback control with a time delay is implemented. In this feedback, the distributed sensor signal which is proportional to strains is amplified and applied to the actuator after a time delay. Because of the nature of the problem the control action enters as a boundary control. An evaluation of the control effectiveness, natural frequency and damping is made for the case of a cantilever beam. Comparisons are given with the uncontrolled cases and zero-delay systems.

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James M. Sloss, Sarp Adali, Ibrahim S. Sadek, and John C. Bruch Jr. "Piezoelectric displacement feedback control with time delay", Proc. SPIE 3667, Smart Structures and Materials 1999: Mathematics and Control in Smart Structures, (4 June 1999); https://doi.org/10.1117/12.350115

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