Semi-active vibration control with piezoelectric materials as variable-stiffness actuators

William W. Clark

doi:10.1117/12.349775

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2 June 1999 Semi-active vibration control with piezoelectric materials as variable-stiffness actuators

William W. Clark

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Proceedings Volume 3672, Smart Structures and Materials 1999: Passive Damping and Isolation; (1999) https://doi.org/10.1117/12.349775
Event: 1999 Symposium on Smart Structures and Materials, 1999, Newport Beach, CA, United States

Abstract

In this paper, a semi-active control law is used to switch the electrical shunt circuit of a piezoelectric actuator for energy dissipation in a simple mechanical system. Switching is done between open-circuit (high stiffness) and short- or resistive-circuit (low stiffness) states. The actuator is held in its high stiffness state when the system is moving such that energy can be stored in the actuator. When the system's motion would cause it to receive energy back from the actuator, the actuator is switched to a low stiffness state, dissipating the energy. In this numerical study, the state- switched piezoelectric system is used to suppress motions in flexural bending problem.

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William W. Clark "Semi-active vibration control with piezoelectric materials as variable-stiffness actuators", Proc. SPIE 3672, Smart Structures and Materials 1999: Passive Damping and Isolation, (2 June 1999); https://doi.org/10.1117/12.349775

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