{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T03:22:50Z","timestamp":1760239370912,"version":"build-2065373602"},"reference-count":31,"publisher":"MDPI AG","issue":"11","license":[{"start":{"date-parts":[[2020,11,13]],"date-time":"2020-11-13T00:00:00Z","timestamp":1605225600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"USA 1899-Vridei 061913AB-PAP Universidad de Santiago de Chile and &quot;Fondo Nacional de Desarrollo Cient\u00edfico y Tecnol\u00f3gico&quot;-Fondecyt, Chile","award":["1151199"],"award-info":[{"award-number":["1151199"]}]},{"DOI":"10.13039\/501100003593","name":"Conselho Nacional de Desenvolvimento Cient\u00edfico e Tecnol\u00f3gico","doi-asserted-by":"publisher","award":["30.4351\/2014-8\/PQ"],"award-info":[{"award-number":["30.4351\/2014-8\/PQ"]}],"id":[{"id":"10.13039\/501100003593","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Symmetry"],"abstract":"<jats:p>This paper deals with robust state estimation for discrete-time, linear parameter varying (LPV) descriptor systems. It is assumed that all the system state-space matrices are affine functions of the uncertain parameters and both the parameters and their variations are bounded functions of time with known minimum and maximum values. First, necessary and sufficient conditions are proposed for admissibility and bounded realness for discrete linear time-varying (DLTV) descriptor systems. Next, two convex optimisation based methods are proposed for designing admissible stationary linear descriptor filters for LPV descriptor systems which ensure a prescribed upper bound on the \u21132-induced gain from the noise signal to the estimation error regardless of model uncertainties. The proposed filter design results were based on parameter-dependent generalised Lyapunov functions, and full-order, augmented-order and reduced-order filters were considered. Numerical examples are presented to show the effectiveness of the proposed filtering scheme. In particular, the proposed approach was used to estimate the state variables of a controlled horizontal 2-DOF robotic manipulator based on noisy measurements.<\/jats:p>","DOI":"10.3390\/sym12111871","type":"journal-article","created":{"date-parts":[[2020,11,13]],"date-time":"2020-11-13T10:32:47Z","timestamp":1605263567000},"page":"1871","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Robust Filtering for Discrete-Time Linear Parameter-Varying Descriptor Systems"],"prefix":"10.3390","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2087-136X","authenticated-orcid":false,"given":"Carlos","family":"Rodriguez","sequence":"first","affiliation":[{"name":"Departamento de Ingenieria Electrica, Universidad de Santiago de Chile, Estaci\u00f3n Central, 9170022 Santiago, Chile"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7183-2662","authenticated-orcid":false,"given":"Karina A.","family":"Barbosa","sequence":"additional","affiliation":[{"name":"Departamento de Ingenieria Electrica, Universidad de Santiago de Chile, Estaci\u00f3n Central, 9170022 Santiago, Chile"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4249-1288","authenticated-orcid":false,"given":"Daniel","family":"Coutinho","sequence":"additional","affiliation":[{"name":"Department of Automation and Systems, Universidade Federal de Santa Catarina (UFSC), PO BOX 476, 88040-900 Florian\u00f3polis, Santa Catarina, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2020,11,13]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Duan, G.R. 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