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Research Papers

Study and Analysis of Anti Vibratory Passive and Active Methods Applied to Complex Mechanical System

[+] Author and Article Information
Cédric Lopez

Arts et Metiers ParisTech LSIS, 2, cours des Arts et Métiers, 13617 Aix en Provence, Francecedric.lopez@aix.ensam.fr

François Malburet

Arts et Metiers ParisTech LSIS, 2, cours des Arts et Métiers, 13617 Aix en Provence, Francefrancois.malburet@aix.ensam.fr

André Barraco

ENSAM LMSP, 151, Boulevard de l’Hôpital, 75013 Paris, Franceandre.barraco@paris.ensam.fr

J. Comput. Nonlinear Dynam 7(2), 021014 (Jan 17, 2012) (8 pages) doi:10.1115/1.4005236 History: Received June 20, 2007; Revised June 15, 2011; Published January 17, 2012; Online January 17, 2012

This paper studies problematic of a mechanical system composed of different coupled parts submitted to a high speed shock and proposes analysis of anti vibratory passive and active methods based on an experimental and theoretical coupled approach. After a shock, different parts of the system oscillate. If one of them is excited at a particular frequency, such as its proper frequency, important oscillations appear and can lead to the deterioration of the system by introducing important stresses. In this paper, we propose an analysis in order to understand this kind of problem and what we can do to avoid it. Firstly, we discuss problematic and we expose the studied system. In a second time, we develop two approaches of modeling that allow us to understand the phenomenon by carrying out numerical simulations. Then cross checking of model is completed via experimental study on drop test bench. Passive minimization method of vibrations based on experimental and theoretical coupled approach is exposed. Finally, a comparative analysis of different methods of control and experimental results of controlled system are presented.

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Copyright © 2012 by American Society of Mechanical Engineers
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Figures

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Figure 1

Modeling and definition of parameters

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Figure 2

Excitation force on ms - Analytical model

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Figure 3

Multibody model of studied system

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Figure 4

Excitation force on ms - Comparison between analytical model and multibody model

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Figure 6

Cross checking results - acceleration of mq

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Figure 7

Cross checking results - suspension stroke

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Figure 8

Passive optimization - measured acceleration mq

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Figure 9

Passive optimization - measured stroke

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Figure 10

Acceleration of the mass mq - comparison between passive and PID controllers

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Figure 11

Acceleration of the mass mq - comparison between passive, PID and Sliding mode controllers

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Figure 12

Measure of acceleration - comparison between passive and semi active system

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