Physics
Scientific paper
Jan 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002iaf..confe.452m&link_type=abstract
IAF abstracts, 34th COSPAR Scientific Assembly, The Second World Space Congress, held 10-19 October, 2002 in Houston, TX, USA.,
Physics
Scientific paper
very important due to the rapid development of "Intelligent" mechanical systems and space structures. Piezoelectric materials are being widely used by researchers in the areas of vibration measurement and active control. In this paper, intelligent beam structures with piezoelectric sensors/actuators are modeled and simulated by using finite element method. The piezoelectric stiffness matrix and dielectric stiffness matrix of a beam element are derived in detail. The distributed piezoelectric sensing layer monitors the structural oscillation due to the direct piezoelectric effect and the distributed actuator layer suppresses the oscillation via the converse piezoelectric effect. Two numerical examples are given. The first example, which consists of two piezoelectric layers used as a bimorph robotic finger, checks the accuracy of the finite element solution. The second example, a beam with two polyvinylidene fluoride (PVDF) layers, studies the vibration control when the external disturbance is applied.
Feng Xuemei
Liu Hongying
Lu Laijie
Ma Aijun
Wu Bin
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