Control Application of Piezoelectric Materials to Aeroelastic Self-Excited VibrationsReport as inadecuate




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Shock and Vibration - Volume 2014 2014, Article ID 509024, 7 pages -

Review ArticleDepartment of Mechanical Engineering, Islamic Azad University, Shadegan Branch, Fatholmobin Bl, Shadegan, Khuzestan 6431863758, Iran

Received 2 November 2013; Revised 14 February 2014; Accepted 2 March 2014; Published 17 March 2014

Academic Editor: Hongyi Li

Copyright © 2014 Mohammad Amin Rashidifar and Darvish Ahmadi. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A method for application of piezoelectric materials to aeroelasticity of turbomachinery blades is presented. The governing differential equations of an overhung beam are established. The induced voltage in attached piezoelectric sensors due to the strain of the beam is calculated. In aeroelastic self-excited vibrations, the aerodynamic generalized force of a specified mode can be described as a linear function of the generalized coordinate and its derivatives. This simplifies the closed loop system designed for vibration control of the corresponding structure. On the other hand, there is an industrial interest in measurement of displacement, velocity, acceleration, or a contribution of them for machinery condition monitoring. Considering this criterion in quadratic optimal control systems, a special style of performance index is configured. Utilizing the current relations in an aeroelastic case with proper attachment of piezoelectric elements can provide higher margin of instability and lead to lower vibration magnitude.





Author: Mohammad Amin Rashidifar and Darvish Ahmadi

Source: https://www.hindawi.com/



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