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For such systems, the output feedback controller is sampled-data in space and continuous in time. Here, we suppose that the sampled-in-space intervals are bounded. Under point measurements (PMs) or averaged measurements (AMs), the sampled-data observation problem is first considered. With the designed nonlinear observer, the sampled-data observer-based controller is then proposed to asymptotically stabilize the resulting closed-loop system in terms of the fractional Halanay inequality and the fractional Lyapunov method. Numerical examples are provided to valid the efficiency of the suggested synthesis.<\/jats:p>","DOI":"10.1177\/01423312241236104","type":"journal-article","created":{"date-parts":[[2024,4,2]],"date-time":"2024-04-02T09:56:37Z","timestamp":1712051797000},"page":"3-17","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":7,"title":["Sampled-data observer-based nonlinear control for coupled semilinear fractional-order partial differential equation systems with time-varying delays"],"prefix":"10.1177","volume":"47","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9384-9059","authenticated-orcid":false,"given":"Juan","family":"Chen","sequence":"first","affiliation":[{"name":"Aliyun School of Big Data, Changzhou University, P.R. 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