Suppression of limit cycle oscillations in the van der Pol oscillator by means of passive non-linear energy sinks
We study suppression of the limit cycle oscillations (LCOs) of a van der Pol (VDP) oscillator, utilizing two configurations of non‐linear energy sink (NES)—grounded and ungrounded. Through computational parameter studies we verify LCO elimination for certain ranges of NES parameters. Then, we establ...
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Published in | Structural control and health monitoring Vol. 13; no. 1; pp. 41 - 75 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Chichester, UK
John Wiley & Sons, Ltd
01.01.2006
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Subjects | |
Online Access | Get full text |
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Summary: | We study suppression of the limit cycle oscillations (LCOs) of a van der Pol (VDP) oscillator, utilizing two configurations of non‐linear energy sink (NES)—grounded and ungrounded. Through computational parameter studies we verify LCO elimination for certain ranges of NES parameters. Then, we establish the slow‐flow equations to perform numerical and analytical studies of the transient and steady‐state dynamics of the configuration studied. The transient dynamics turns out to involve resonance captures, through which irreversible, passive energy transfer (called non‐linear energy pumping) is achieved from the VDP oscillator to the NES. We also perform computational bifurcation analysis by means of numerical continuation to gain some understanding of the dynamics of generation and elimination of non‐linear energy pumping. The steady‐state dynamics shows that the system may possess either subcritical or supercritical LCOs, leading to different degrees of robustness of suppression. The results reported in this work support the applicability of the NES concept to suppression of instabilities in self‐excited systems. Copyright © 2005 John Wiley & Sons, Ltd. |
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Bibliography: | AFOSR - No. FA9550-04-1-0073 ark:/67375/WNG-99P1W52M-H ArticleID:STC143 istex:9CF74AA78A48E5291261DB71EA1A363123F64B6A ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 1545-2255 1545-2263 |
DOI: | 10.1002/stc.143 |