Suppression of distributed dynamical deflection by piezoelectric materials for harmonic external loads

Chih-Yu Hsu; Lothar Gaul; Chien-Chang Lin

doi:10.1117/12.275715

6 June 1997 Suppression of distributed dynamical deflection by piezoelectric materials for harmonic external loads

Chih-Yu Hsu, Lothar Gaul, Chien-Chang Lin

Proceedings Volume 3041, Smart Structures and Materials 1997: Smart Structures and Integrated Systems; (1997) https://doi.org/10.1117/12.275715
Event: Smart Structures and Materials '97, 1997, San Diego, CA, United States

Abstract

A smart structure system which uses the piezoelectric materials as sensors to identify harmonic external loads and as actuators to suppress the structure vibration is proposed. Signal estimation subprogram and load estimation subprogram use the piezoelectric materials as sensors to estimate the frequencies, amplitudes and phases of the harmonic external loads based on the dynamic responses of structures. After the load estimation procedure, the optimal voltages of actuators are determined by requiring minimization of deflection amplitude of structure. The piezoelectric materials can also be used as actuators to suppress harmonic vibrations of the structure under the estimated external harmonic loads. The method has been applied for beams containing distributed piezoelectric materials. The simulation results validate that the method is effective for suppression of harmonic vibration.

Citation Download Citation

Chih-Yu Hsu, Lothar Gaul, and Chien-Chang Lin "Suppression of distributed dynamical deflection by piezoelectric materials for harmonic external loads", Proc. SPIE 3041, Smart Structures and Materials 1997: Smart Structures and Integrated Systems, (6 June 1997); https://doi.org/10.1117/12.275715

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