This Article Full Text (PDF) References Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Add to Saved Citations Download to citation manager Request Permissions Request Reprints Add to My Marked Citations Citing Articles Citing Articles via Google Scholar Citing Articles via Scopus Google Scholar Articles by Sung, C.-C. Articles by Varadan, V. K. Search for Related Content Social Bookmarking                         What's this?

Active Torsional Vibration Control Experiments Using Shear-Type Piezoceramic Sensors and Actuators

Institute of Naval Architecture and Ocean Engineering The National Taiwan University Taipei, Taiwan, R.O.C.

Vasundara V. Varadan

Institute of Naval Architecture and Ocean Engineering The National Taiwan University Taipei, Taiwan, R.O.C.

Xiao-Qi Bao

Institute of Naval Architecture and Ocean Engineering The National Taiwan University Taipei, Taiwan, R.O.C.

Vijay K. Varadan

Institute of Naval Architecture and Ocean Engineering The National Taiwan University Taipei, Taiwan, R.O.C.

In this article, active control of pure torsional vibrations using piezoelectric shear-type transducers is discussed Pure torsional vibrations can be sensed and controlled by incor porating these transducers into tube-type structures. The effects of changing the electrode orientation with respect to the polarization direction of the shear mode transducers is discussed. Two types of shear mode piezoelectric transducers-ring-type with tangential polarization and shell-type with axial polarization-are examined. In other words, the piezoelectric constant d₁₅ is utilized. Different sizes of phenolic and pyrex tubes are employed in this experiment Since the sensor signal is proportional to the rate of change of the angular displacement, a velocity feedback control technique is ap plied. The time domain responses for the first mode, and fre quency domain responses for the first three modes, are demon strated. Individual and simultaneous control for the first three fundamental modes, respectively, have been successfully obtained.

Journal of Intelligent Material Systems and Structures, Vol. 5, No. 3, 436-442 (1994)
DOI: 10.1177/1045389X9400500319


CiteULike    Complore    Connotea    Del.icio.us    Digg    Reddit    Technorati    Twitter    What's this?