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Shock and Vibration
Volume 2016, Article ID 5375309, 12 pages
Research Article

Hybrid Vibration Control under Broadband Excitation and Variable Temperature Using Viscoelastic Neutralizer and Adaptive Feedforward Approach

1Universidade Federal do Paraná, Departamento de Engenharia Mecanica, Rua Coronel Francisco H. dos Santos, s/n, Bloco IV, Centro Politécnico, 81530-900 Curitiba, PR, Brazil
2Universidade Federal de Santa Catarina, Rua Voluntario Fernando Caldeira 87, 88085-290 Florianopolis, SC, Brazil
3Universidade Federal de Santa Catarina, Departamento de Engenharia Elétrica, LINSE, Caixa Postal 476, 88040-900 Florianópolis, SC, Brazil

Received 2 January 2016; Revised 11 April 2016; Accepted 1 June 2016

Academic Editor: Londono Monsalve

Copyright © 2016 João C. O. Marra et al. 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.


Vibratory phenomena have always surrounded human life. The need for more knowledge and domain of such phenomena increases more and more, especially in the modern society where the human-machine integration becomes closer day after day. In that context, this work deals with the development and practical implementation of a hybrid (passive-active/adaptive) vibration control system over a metallic beam excited by a broadband signal and under variable temperature, between 5 and 35°C. Since temperature variations affect directly and considerably the performance of the passive control system, composed of a viscoelastic dynamic vibration neutralizer (also called a viscoelastic dynamic vibration absorber), the associative strategy of using an active-adaptive vibration control system (based on a feedforward approach with the use of the FXLMS algorithm) working together with the passive one has shown to be a good option to compensate the neutralizer loss of performance and generally maintain the extended overall level of vibration control. As an additional gain, the association of both vibration control systems (passive and active-adaptive) has improved the attenuation of vibration levels. Some key steps matured over years of research on this experimental setup are presented in this paper.