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 Similar articles in Web of Science 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 HighWire Citing Articles via Web of Science (5) Citing Articles via Google Scholar Citing Articles via Scopus Google Scholar Articles by Kim, J.-S. Articles by Smith, E. C. Search for Related Content Social Bookmarking                         What's this?

High-authority Piezoelectric Actuation System Synthesis through Mechanical Resonance and Electrical Tailoring

Department of Aerospace Engineering,The Rotorcraft Center of Excellence, The Pennsylvania State University, University Park, PA 16802, USA, jskim{at}psu.edu

K. W. Wang

Department of Mechanical Engineering, The Rotorcraft Center of Excellence, The Pennsylvania State University, University Park, PA 16802, USA

Edward C. Smith

Department of Aerospace Engineering, The Rotorcraft Center of Excellence, The Pennsylvania State University, University Park, PA 16802, USA

In this research, a new approach is proposed to enhance the effectiveness of piezoelectric actuators. Through mechanical tailoring, the resonant frequencies of the actuation system (this includes the piezoelectric actuator and the related mechanical and electrical elements for actuation) can be tuned to the required actuation frequencies. This obviously will increase the authority (both stroke and force) of the actuation system. However, the resonant actuation system can be hard to control and nonrobust, due to its narrow operating bandwidth. This issue can be resolved through electric circuit tailoring. With the aid of a network of inductance, resistance, and negative capacitance, the actuation resonant peak can be significantly broadened and flattened. In this case, one can achieve a high authority actuation system without the negative effects of resonant problems. The electrical networks can also achieve a fail-safe system due to its passive shunting character. The proposed concept is evaluated using a PZT tube actuator for trailing edge flap control of rotorcraft blades. Promising results are demonstrated, showing that the treatment can indeed create a high-authority and robust actuation system that satisfies the performance requirements of the example application. Also, the proposed concept is verified by experiments using an equivalent circuit model with a synthetic inductor and a negative impedance converter of capacitance.

Key Words: piezoelectric • mechanical resonance • resonant actuator • negative capacitance • shunt circuit • trailing edge flap

Journal of Intelligent Material Systems and Structures, Vol. 16, No. 1, 21-31 (2005)
DOI: 10.1177/1045389X05046686


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

This article has been cited by other articles:

				A. A. Rader, F. F. Afagh, A. Yousefi-Koma, and D. G. Zimcik Optimization of Piezoelectric Actuator Configuration on a Flexible Fin for Vibration Control using Genetic Algorithms Journal of Intelligent Material Systems and Structures, October 1, 2007; 18(10): 1015 - 1033. [Abstract] [PDF]