Real-time tunable single-degree of freedom, multiple-frequency vibration absorber

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F19%3A00338892" target="_blank" >RIV/68407700:21220/19:00338892 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1016/j.ymssp.2019.07.025" target="_blank" >https://doi.org/10.1016/j.ymssp.2019.07.025</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ymssp.2019.07.025" target="_blank" >10.1016/j.ymssp.2019.07.025</a>

Result language

angličtina

Original language name

Real-time tunable single-degree of freedom, multiple-frequency vibration absorber

Original language description

Typically single-mass absorbers combat a single excitation frequency at a time. In this paper we explore a novel control scheme to handle multiple and time-varying frequencies, but again using a single-mass absorber. The key scientific contribution is in the new way the spectral sensitivity is induced to the absorber substructure at multiple frequencies. This tuning process is achieved using a novel extension to the conventional Delayed Resonator (DR) concept with several delays. We show that the method can track all frequencies in real time. Therefore the new conception dramatically expands the traditional fixed-frequency absorption operations, for instance Dual Frequency Fixed Delayed Resonator (DFFDR). On-line deployment starts with a selection of a base delay in the feedback control on a given passive absorber. Necessary feedback gains for proper tuning are evaluated and control decision is made in real time. The stability repercussions of this control law, however, need to be assessed in advance. For this we use a recent characteristic root approximation method, QPmR (Quasi-Polynomial Mapping Based Root finding). These assessments create some restrictions for tunable frequency ranges with guaranteed stability. Such limitations, as well as the practical complexities of the new tuning method are also discussed over an example case study. (C) 2019 Elsevier Ltd. All rights reserved.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20301 - Mechanical engineering

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2019

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Mechanical Systems and Signal Processing

ISSN

0888-3270

e-ISSN

1096-1216

Volume of the periodical

133

Issue of the periodical within the volume

106244

Country of publishing house

GB - UNITED KINGDOM

Number of pages

14

Pages from-to

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UT code for WoS article

000489689600046

EID of the result in the Scopus database

2-s2.0-85069957424