{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,7]],"date-time":"2026-07-07T00:48:40Z","timestamp":1783385320432,"version":"3.54.6"},"reference-count":37,"publisher":"MDPI AG","issue":"13","license":[{"start":{"date-parts":[[2022,6,24]],"date-time":"2022-06-24T00:00:00Z","timestamp":1656028800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Zhejiang Provincial Key Research and Development Program","award":["2021C03154"],"award-info":[{"award-number":["2021C03154"]}]},{"name":"Zhejiang Provincial Key Research and Development Program","award":["51878235"],"award-info":[{"award-number":["51878235"]}]},{"name":"Zhejiang Provincial Key Research and Development Program","award":["51778568"],"award-info":[{"award-number":["51778568"]}]},{"name":"Zhejiang Provincial Key Research and Development Program","award":["51578491"],"award-info":[{"award-number":["51578491"]}]},{"name":"Zhejiang Provincial Key Research and Development Program","award":["2017YFC0806100"],"award-info":[{"award-number":["2017YFC0806100"]}]},{"name":"National Natural Science Foundation of China","award":["2021C03154"],"award-info":[{"award-number":["2021C03154"]}]},{"name":"National Natural Science Foundation of China","award":["51878235"],"award-info":[{"award-number":["51878235"]}]},{"name":"National Natural Science Foundation of China","award":["51778568"],"award-info":[{"award-number":["51778568"]}]},{"name":"National Natural Science Foundation of China","award":["51578491"],"award-info":[{"award-number":["51578491"]}]},{"name":"National Natural Science Foundation of China","award":["2017YFC0806100"],"award-info":[{"award-number":["2017YFC0806100"]}]},{"name":"National Key R&amp;D Program of China","award":["2021C03154"],"award-info":[{"award-number":["2021C03154"]}]},{"name":"National Key R&amp;D Program of China","award":["51878235"],"award-info":[{"award-number":["51878235"]}]},{"name":"National Key R&amp;D Program of China","award":["51778568"],"award-info":[{"award-number":["51778568"]}]},{"name":"National Key R&amp;D Program of China","award":["51578491"],"award-info":[{"award-number":["51578491"]}]},{"name":"National Key R&amp;D Program of China","award":["2017YFC0806100"],"award-info":[{"award-number":["2017YFC0806100"]}]},{"name":"Funding of Center for Balance Architecture, Zhejiang University","award":["2021C03154"],"award-info":[{"award-number":["2021C03154"]}]},{"name":"Funding of Center for Balance Architecture, Zhejiang University","award":["51878235"],"award-info":[{"award-number":["51878235"]}]},{"name":"Funding of Center for Balance Architecture, Zhejiang University","award":["51778568"],"award-info":[{"award-number":["51778568"]}]},{"name":"Funding of Center for Balance Architecture, Zhejiang University","award":["51578491"],"award-info":[{"award-number":["51578491"]}]},{"name":"Funding of Center for Balance Architecture, Zhejiang University","award":["2017YFC0806100"],"award-info":[{"award-number":["2017YFC0806100"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Wireless sensor networks usually suffer from the issue of time synchronization discrepancy due to environmental effects or clock management collapse. This will result in time delays between the dynamic responses collected by wireless sensors. If non-synchronized dynamic response data are directly used for structural modal identification, it leads to the misestimation of modal parameters. To overcome the non-synchronization issue, this study proposes a time synchronization approach to detect and correct asynchronous dynamic responses based on frequency domain decomposition (FDD) with frequency-squeezing processing (FSP). By imposing the expected relationship between modal phase angles extracted from the first-order singular value spectrum, the time lags between different sensors can be estimated, and synchronization can be achieved. The effectiveness of the proposed approach is fully demonstrated by numerical and experimental studies, as well as field measurement of a large-span spatial structure. The results verify that the proposed approach is effective for the time synchronization of wireless accelerometer sensors.<\/jats:p>","DOI":"10.3390\/s22134784","type":"journal-article","created":{"date-parts":[[2022,6,26]],"date-time":"2022-06-26T22:50:23Z","timestamp":1656283823000},"page":"4784","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":14,"title":["An Approach for Time Synchronization of Wireless Accelerometer Sensors Using Frequency-Squeezing-Based Operational Modal Analysis"],"prefix":"10.3390","volume":"22","author":[{"given":"Yi","family":"Chen","sequence":"first","affiliation":[{"name":"College of Civil and Architecture Engineering, Zhejiang University, Hangzhou 310058, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiaoqing","family":"Zheng","sequence":"additional","affiliation":[{"name":"Center for Balance Architecture, Zhejiang University, Hangzhou 310058, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yaozhi","family":"Luo","sequence":"additional","affiliation":[{"name":"College of Civil and Architecture Engineering, Zhejiang University, Hangzhou 310058, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2148-9138","authenticated-orcid":false,"given":"Yanbin","family":"Shen","sequence":"additional","affiliation":[{"name":"College of Civil and Architecture Engineering, Zhejiang University, Hangzhou 310058, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yu","family":"Xue","sequence":"additional","affiliation":[{"name":"College of Civil and Architecture Engineering, Zhejiang University, Hangzhou 310058, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wenwei","family":"Fu","sequence":"additional","affiliation":[{"name":"College of Civil and Architecture Engineering, Zhejiang University, Hangzhou 310058, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2022,6,24]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1715","DOI":"10.1016\/j.engstruct.2005.02.021","article-title":"Technology developments in structural health monitoring of large-scale bridges","volume":"27","author":"Ko","year":"2005","journal-title":"Eng. 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