Optimized design of robust resonator with distributed time-delay

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F19%3A00330651" target="_blank" >RIV/68407700:21220/19:00330651 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21730/19:00330651

Výsledek na webu

<a href="https://doi.org/10.1016/j.jsv.2018.12.002" target="_blank" >https://doi.org/10.1016/j.jsv.2018.12.002</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jsv.2018.12.002" target="_blank" >10.1016/j.jsv.2018.12.002</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Optimized design of robust resonator with distributed time-delay

Popis výsledku v původním jazyce

An extension of the well-known delayed resonator concept is proposed with the objective to enhance its robustness in vibration suppression under guaranteeing stability of the overall set up. The novel resonator feedback is based on an acceleration measurements passing through a delay of polynomial distribution. The feedback design is formulated as an optimization problem over the parameter set formed by the polynomial coefficients and the gain of the delay free part. The first objective is to minimize the sensitivity of the resonator performance with respect to variations of the excitation frequency, i.e. to widen its frequency stopband centered at the nominal excitation frequency. The second, equally significant objective is to guarantee that this does not lead to instability of the overall mechanical system coupled with the absorber and to ensure sufficient stability margin. The arising non-convex and nonsmooth optimization problem is widely discussed and a penalty method is developed, where the unconstrained problem in every iteration step is solved using available software tools for optimization and spectral design of time delay systems. The proposed design technique is validated by simulations for two case study examples.

Název v anglickém jazyce

Optimized design of robust resonator with distributed time-delay

Popis výsledku anglicky

An extension of the well-known delayed resonator concept is proposed with the objective to enhance its robustness in vibration suppression under guaranteeing stability of the overall set up. The novel resonator feedback is based on an acceleration measurements passing through a delay of polynomial distribution. The feedback design is formulated as an optimization problem over the parameter set formed by the polynomial coefficients and the gain of the delay free part. The first objective is to minimize the sensitivity of the resonator performance with respect to variations of the excitation frequency, i.e. to widen its frequency stopband centered at the nominal excitation frequency. The second, equally significant objective is to guarantee that this does not lead to instability of the overall mechanical system coupled with the absorber and to ensure sufficient stability margin. The arising non-convex and nonsmooth optimization problem is widely discussed and a penalty method is developed, where the unconstrained problem in every iteration step is solved using available software tools for optimization and spectral design of time delay systems. The proposed design technique is validated by simulations for two case study examples.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20302 - Applied mechanics

Projekt

<a href="/cs/project/GA17-20943S" target="_blank" >GA17-20943S: Aktivní vícerozměrné hltiče vibrací složitých mechanických konstrukcí založené na metodě zpožděného rezonátoru</a><br>

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

Journal of Sound and Vibration

ISSN

0022-460X

e-ISSN

1095-8568

Svazek periodika

443

Číslo periodika v rámci svazku

March

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

15

Strana od-do

576-590

Kód UT WoS článku

000455674200035

EID výsledku v databázi Scopus

2-s2.0-85058671096