000004921 001__ 4921
000004921 005__ 20141119144604.0
000004921 04107 $$aeng
000004921 046__ $$k2002-06-02
000004921 100__ $$aChen, Genda
000004921 24500 $$aEFFICIENCY OF PIEZOELECTRIC WEDGE ACTUATORS FOR FINE TUNING OF MASS DAMPERS IN STRUCTURAL APPLICATIONS

000004921 24630 $$n15.$$pProceedings of the 15th ASCE Engineering Mechanics Division Conference
000004921 260__ $$bColumbia University in the City of New York
000004921 506__ $$arestricted
000004921 520__ $$2eng$$aA 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.

000004921 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000004921 653__ $$aPiezoelectric actuators, tuned mass dampers, performance, and control algorithms.

000004921 7112_ $$a15th ASCE Engineering Mechanics Division Conference$$cNew York (US)$$d2002-06-02 / 2002-06-05$$gEM2002
000004921 720__ $$aChen, Genda$$iSmith, Derek
000004921 8560_ $$ffischerc@itam.cas.cz
000004921 8564_ $$s148133$$uhttp://invenio.itam.cas.cz/record/4921/files/542.pdf$$yOriginal version of the author's contribution as presented on CD, .
000004921 962__ $$r4594
000004921 980__ $$aPAPER