Efficiency of Piezoelectric Wedge Actuators for Fine Tuning of Mass Dampers in Structural Applications
A piezoelectric wedge actuator (PWA) is proposed in this paper to improve the seismic effectiveness of a passive tuned mass damper (TMD). A PWA is composed of a thin aluminum plate and two piezoelectric sheets bonded on the aluminum plate. The actuator is connected in series with a TMD and will be used either as a variable stiffness device or a damping unit regulated with applied voltage. Several control algorithms including displacement proportional, velocity proportional, and Bang-Bang strategies are considered. Numerical results indicate that a PWA is effective for a light mass damper and rapidly become ineffective as the weight of the damper increases. A change of 1% in natural frequency of a TMD experiencing a peak displacement of 0.25 in. can be achieved with the displacement proportional control when 750 Volts are applied on the piezoelectric actuator. Similarly, an increase of 33% in damping ratio can be achieved with the velocity proportional control and an equivalent damping ratio of 0.054 is obtained with the Bang-Bang control for a TMD of 0.024 original damping ratio.
G. Chen and D. Smith, "Efficiency of Piezoelectric Wedge Actuators for Fine Tuning of Mass Dampers in Structural Applications," Proceedings of the 15th ASCE Engineering Mechanics Conference (2002, Columbia University, NY), American Society of Civil Engineers (ASCE), Jun 2002.
15th ASCE Engineering Mechanics Conference (2002: Jun. 2-5, Columbia University, NY)
Civil, Architectural and Environmental Engineering
Article - Conference proceedings
© 2002 American Society of Civil Engineers (ASCE), All rights reserved.