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International Journal of Aerospace Engineering - Volume 2014 2014, Article ID 432970, 12 pages -

Research ArticleState Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing 400030, China

Received 26 December 2013; Accepted 23 June 2014; Published 14 July 2014

Academic Editor: N. Ananthkrishnan

Copyright © 2014 Dongdong Zhang and Ling Zheng. 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.


A finite element model of plate partly treated with ACLD treatments is developed based on the constitutive equations of elastic, piezoelectric, viscoelastic materials and Hamilton’s principle. The Golla-Hughes-Mctavish GHM method is employed to describe the frequency-dependent characteristics of viscoelastic material VEM. A model reduction is completed by using iterative dynamic condensation and balance model reduction method to design an effective control system. The emphasis is concerned on hybrid combined feedback-feedforward control system to attenuate the vibration of plates with ACLD treatments. The optimal linear quadratic Gaussian LQG controller is considered as a feedback channel and the adaptive filtered-reference LMS FxLMS controller is used as a feedforward channel. They can be utilized individually or in a hybrid way to suppress the vibration of plate-ACLD system. The results show that the hybrid controller which combines feedback-feedforward together can reduce the displacement amplitude of plate-ACLD system subjected to a complicated disturbance substantially without requiring more control effort. Furthermore, the hybrid controller has more rapid and stable convergence rate than the adaptive feedforward FxLMS controller. Meanwhile, perfect robustness to phase error of the cancellation path in feedforward controller and the weight matrices in feedback LQG controller is demonstrated in proposed hybrid controller. Therefore, its application in structural engineering can be highly appreciated.

Autor: Dongdong Zhang and Ling Zheng



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