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Stability analysis and comparative experimentation for two substructuring schemes, with a pure time delay in the actuation system
https://nied-repo.bosai.go.jp/records/4296
https://nied-repo.bosai.go.jp/records/429677284a48-8f91-4a16-876d-3c2f443940ce
| Item type | researchmap(1) | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 公開日 | 2025-06-09 | |||||||||||
| タイトル | ||||||||||||
| 言語 | en | |||||||||||
| タイトル | Stability analysis and comparative experimentation for two substructuring schemes, with a pure time delay in the actuation system | |||||||||||
| 言語 | ||||||||||||
| 言語 | eng | |||||||||||
| 著者 |
Ryuta Enokida
× Ryuta Enokida
× David Stoten
× Koichi Kajiwara
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| 抄録 | ||||||||||||
| 内容記述タイプ | Other | |||||||||||
| 内容記述 | In recent years there has been a focus on two types of scheme for dynamical substructure testing: the hybrid scheme (HS) and the dynamically substructured system (DSS) scheme. Although these approaches are fundamentally different in the manner of compensation/ control, the comparative performance of the schemes has not yet been studied in simulated or real experimental tests. This paper studies the performance of these schemes via tests on a simple base-isolated structure with a natural rubber bearing.In dynamical tests, a guarantee of stability for the experimental system is essential in order to achieve a safe and reliable result. Pure time delays can be present in such experimental systems, primarily due to discrete-time computational elements, which will promote instability. This paper studies the stability of HS and DSS test systems, with a prime focus on the effect of pure time delays. In particular the schemes were applied to the substructure testing of a rubber isolation bearing, where the overall system included a digital computation time delay of r_6 ms resulting from a series of control, data acquisition and signal filter elements. Neither delay compensation nor adaptive/selftuning methods were included in these tests, in order to establish a fair and objective comparison between the basic forms of the two schemes. It was found that DSS stability was preserved in the presence of the 6 ms delay, whereas FIS was rendered unstable. This increase in robustness was due to a linear substructure controller (LSC) used in the DSS, which was based upon a knowledge of the dynamics of the transfer system and substructures.In addition, DSS exhibited significant robustness to further artificial increases in the pure time delay, eventually yielding to instability at a value of r = 17 ms. Analysis of the two schemes was found to be effective at predicting accurate stability conditions in advance of actual experimentation. (C) 2015 Elsevier Ltd. All rights reserved. | |||||||||||
| 言語 | en | |||||||||||
| 書誌情報 |
en : JOURNAL OF SOUND AND VIBRATION 巻 346, p. 1-16, 発行日 2015-06 |
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| 出版者 | ||||||||||||
| 言語 | en | |||||||||||
| 出版者 | ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD | |||||||||||
| ISSN | ||||||||||||
| 収録物識別子タイプ | EISSN | |||||||||||
| 収録物識別子 | 1095-8568 | |||||||||||
| DOI | ||||||||||||
| 関連識別子 | 10.1016/j.jsv.2015.02.024 | |||||||||||
