{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,6]],"date-time":"2025-11-06T12:14:32Z","timestamp":1762431272082},"reference-count":15,"publisher":"World Scientific Pub Co Pte Lt","issue":"10","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J CIRCUIT SYST COMP"],"published-print":{"date-parts":[[2017,10]]},"abstract":"<jats:p> In the present paper, the problem of digital implementation of retuning fractional-order (FO) controllers for an unstable plant \u2014 a real-life laboratory model of a Magnetic Levitation System (MLS) \u2014 is investigated. Retuning control is applied to an existing closed-loop PID control system through the use of a hardware FO controller prototype. An implementation method for the retuning controller is proposed. Three types of hardware-in-the-loop (HIL) experiments are considered. First, the plant is simulated using a suitable dynamic model. Second, the real-life laboratory model of the MLS is controlled. In the third type of experiment, a MATLAB implementation of the retuning controller is evaluated as a benchmark. Three controllers obtained in an earlier work are tested with this setup. Experimental results are compared and discussed. <\/jats:p>","DOI":"10.1142\/s0218126617501651","type":"journal-article","created":{"date-parts":[[2017,3,24]],"date-time":"2017-03-24T08:53:14Z","timestamp":1490345594000},"page":"1750165","source":"Crossref","is-referenced-by-count":4,"title":["Digital Realization of Retuning Fractional-Order Controllers for an Existing Closed-Loop Control System"],"prefix":"10.1142","volume":"26","author":[{"given":"Aleksei","family":"Tepljakov","sequence":"first","affiliation":[{"name":"Department of Computer Systems, School of Information Technologies, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, Estonia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Eduard","family":"Petlenkov","sequence":"additional","affiliation":[{"name":"Department of Computer Systems, School of Information Technologies, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, Estonia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Emmanuel","family":"Gonzalez","sequence":"additional","affiliation":[{"name":"Existing Installation Department, Jardine Schindler Elevator Corporation, 8\/F Pacific Star Bldg., Sen. 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