{"id":312,"date":"2022-10-12T01:45:08","date_gmt":"2022-10-11T17:45:08","guid":{"rendered":"http:\/\/ldsc503.direct.quickconnect.to:50801\/wordpress\/?p=312"},"modified":"2023-12-28T17:21:36","modified_gmt":"2023-12-28T09:21:36","slug":"%e9%ab%98%e9%80%9f%e7%a3%81%e6%b5%ae%e4%b8%bb%e8%bb%b8%e4%b9%8b%e9%96%89%e8%bf%b4%e8%b7%af%e7%b3%bb%e7%b5%b1%e9%91%91%e5%88%a5","status":"publish","type":"post","link":"https:\/\/ldsc.pme.nthu.edu.tw\/en\/research\/collaboration\/%e9%ab%98%e9%80%9f%e7%a3%81%e6%b5%ae%e4%b8%bb%e8%bb%b8%e4%b9%8b%e9%96%89%e8%bf%b4%e8%b7%af%e7%b3%bb%e7%b5%b1%e9%91%91%e5%88%a5\/","title":{"rendered":"Closed-Loop System Identification of High-Speed Magnetic Levitation Spindle"},"content":{"rendered":"\n<p class=\"has-medium-font-size\">In response to the open-loop instability of magnetic bearing systems, this research develops a closed-loop identification method to obtain an accurate plant model for controller design. The identification method is based on a decentralized and decoupling control architecture, which allows the decoupling of the multi-input-multi-output (MIMO) system into two single-input-single-output (SISO) systems for simplifying the identification process. The identification uses a pseudo-random binary sequence as the excitation signal. A parameterized model is obtained through a parameter estimation algorithm based on the output error model. To ensure that the model prediction error can converge during the computation process, a filter is incorporated into the estimation algorithm. The filter can be synthesized systematically by solving a set of linear matrix inequalities. The performance of the proposed closed-loop identification method is firstly verified by simulations. Then it is implemented on a five-axis magnetic bearing platform and the parameterized model obtained from the identification is compared to the experimental frequency response.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1009\" height=\"448\" src=\"http:\/\/ldsc503.direct.quickconnect.to:50801\/wordpress\/wp-content\/uploads\/2022\/10\/\u5de5\u696d\u81ea\u52d5\u5316_1.png\" alt=\"\" class=\"wp-image-316\" srcset=\"https:\/\/ldsc.pme.nthu.edu.tw\/wp-content\/uploads\/2022\/10\/\u5de5\u696d\u81ea\u52d5\u5316_1.png 1009w, https:\/\/ldsc.pme.nthu.edu.tw\/wp-content\/uploads\/2022\/10\/\u5de5\u696d\u81ea\u52d5\u5316_1-300x133.png 300w, https:\/\/ldsc.pme.nthu.edu.tw\/wp-content\/uploads\/2022\/10\/\u5de5\u696d\u81ea\u52d5\u5316_1-768x341.png 768w, https:\/\/ldsc.pme.nthu.edu.tw\/wp-content\/uploads\/2022\/10\/\u5de5\u696d\u81ea\u52d5\u5316_1-200x89.png 200w\" sizes=\"auto, (max-width: 1009px) 100vw, 1009px\" \/><figcaption class=\"wp-element-caption\">Closed-Loop System Identification Structure of High-Speed Magnetic Levitation Spindle<\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>In response to the open-loop instability of magnetic bearing systems, this research develops a closed-loop identification method to obtain an accurate plant model for controller design. The identification method is based on a decentralized and decoupling control architecture, which allows the decoupling of the multi-input-multi-output (MIMO) system into two single-input-single-output (SISO) systems for simplifying the &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"https:\/\/ldsc.pme.nthu.edu.tw\/en\/research\/collaboration\/%e9%ab%98%e9%80%9f%e7%a3%81%e6%b5%ae%e4%b8%bb%e8%bb%b8%e4%b9%8b%e9%96%89%e8%bf%b4%e8%b7%af%e7%b3%bb%e7%b5%b1%e9%91%91%e5%88%a5\/\"> <span class=\"screen-reader-text\">Closed-Loop System Identification of High-Speed Magnetic Levitation Spindle<\/span> Read More &raquo;<\/a><\/p>\n","protected":false},"author":1,"featured_media":316,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"disabled","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","footnotes":""},"categories":[16],"tags":[],"class_list":["post-312","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-collaboration"],"translation":{"provider":"WPGlobus","version":"2.12.2","language":"en","enabled_languages":["tw","en"],"languages":{"tw":{"title":true,"content":true,"excerpt":false},"en":{"title":true,"content":true,"excerpt":false}}},"uagb_featured_image_src":{"full":["https:\/\/ldsc.pme.nthu.edu.tw\/wp-content\/uploads\/2022\/10\/\u5de5\u696d\u81ea\u52d5\u5316_1.png",1009,448,false],"thumbnail":["https:\/\/ldsc.pme.nthu.edu.tw\/wp-content\/uploads\/2022\/10\/\u5de5\u696d\u81ea\u52d5\u5316_1-150x150.png",150,150,true],"medium":["https:\/\/ldsc.pme.nthu.edu.tw\/wp-content\/uploads\/2022\/10\/\u5de5\u696d\u81ea\u52d5\u5316_1-300x133.png",300,133,true],"medium_large":["https:\/\/ldsc.pme.nthu.edu.tw\/wp-content\/uploads\/2022\/10\/\u5de5\u696d\u81ea\u52d5\u5316_1-768x341.png",768,341,true],"large":["https:\/\/ldsc.pme.nthu.edu.tw\/wp-content\/uploads\/2022\/10\/\u5de5\u696d\u81ea\u52d5\u5316_1.png",1009,448,false],"1536x1536":["https:\/\/ldsc.pme.nthu.edu.tw\/wp-content\/uploads\/2022\/10\/\u5de5\u696d\u81ea\u52d5\u5316_1.png",1009,448,false],"2048x2048":["https:\/\/ldsc.pme.nthu.edu.tw\/wp-content\/uploads\/2022\/10\/\u5de5\u696d\u81ea\u52d5\u5316_1.png",1009,448,false],"depicter-thumbnail":["https:\/\/ldsc.pme.nthu.edu.tw\/wp-content\/uploads\/2022\/10\/\u5de5\u696d\u81ea\u52d5\u5316_1-200x89.png",200,89,true]},"uagb_author_info":{"display_name":"admin","author_link":"https:\/\/ldsc.pme.nthu.edu.tw\/en\/author\/admin\/"},"uagb_comment_info":0,"uagb_excerpt":"In response to the open-loop instability of magnetic bearing systems, this research develops a closed-loop identification method to obtain an accurate plant model for controller design. The identification method is based on a decentralized and decoupling control architecture, which allows the decoupling of the multi-input-multi-output (MIMO) system into two single-input-single-output (SISO) systems for simplifying the&hellip;","_links":{"self":[{"href":"https:\/\/ldsc.pme.nthu.edu.tw\/en\/wp-json\/wp\/v2\/posts\/312","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ldsc.pme.nthu.edu.tw\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ldsc.pme.nthu.edu.tw\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ldsc.pme.nthu.edu.tw\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ldsc.pme.nthu.edu.tw\/en\/wp-json\/wp\/v2\/comments?post=312"}],"version-history":[{"count":7,"href":"https:\/\/ldsc.pme.nthu.edu.tw\/en\/wp-json\/wp\/v2\/posts\/312\/revisions"}],"predecessor-version":[{"id":836,"href":"https:\/\/ldsc.pme.nthu.edu.tw\/en\/wp-json\/wp\/v2\/posts\/312\/revisions\/836"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ldsc.pme.nthu.edu.tw\/en\/wp-json\/wp\/v2\/media\/316"}],"wp:attachment":[{"href":"https:\/\/ldsc.pme.nthu.edu.tw\/en\/wp-json\/wp\/v2\/media?parent=312"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ldsc.pme.nthu.edu.tw\/en\/wp-json\/wp\/v2\/categories?post=312"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ldsc.pme.nthu.edu.tw\/en\/wp-json\/wp\/v2\/tags?post=312"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}