Optimized design of robust resonator with distributed time-delay

Result code in 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>
Alternative codes found
RIV/68407700:21730/19:00330651
Result on the web
<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>

Result language
angličtina
Original language name
Optimized design of robust resonator with distributed time-delay
Original language description
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.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20302 - Applied mechanics

Project
<a href="/en/project/GA17-20943S" target="_blank" >GA17-20943S: Active multidimensional vibration absorbers for complex mechanical structures based on delayed resonator method</a><br>
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

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