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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20301 - Mechanical engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Mechanical Systems and Signal Processing

ISSN

0888-3270

e-ISSN

1096-1216

Svazek periodika

133

Číslo periodika v rámci svazku

106244

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

14

Strana od-do

—

Kód UT WoS článku

000489689600046

EID výsledku v databázi Scopus

2-s2.0-85069957424