{"id":28,"date":"2017-06-09T09:48:12","date_gmt":"2017-06-09T01:48:12","guid":{"rendered":"https:\/\/sites.gc.sjtu.edu.cn\/ido\/design-optimization-2017\/"},"modified":"2020-11-10T16:14:52","modified_gmt":"2020-11-10T08:14:52","slug":"design-optimization-2017","status":"publish","type":"page","link":"https:\/\/sites.gc.sjtu.edu.cn\/ido\/design-optimization-2017\/","title":{"rendered":"Design Optimization"},"content":{"rendered":"<h1>Background<\/h1>\n<hr \/>\n<div>Design optimization \u00a0under uncertainty is one of the most important topics in complex engineering systems. For instance, in engineering design optimization of gas engines (Fig.1), we may have to consider:<\/div>\n<ul>\n<li>Uncertainty due to uncontrollable variations<\/li>\n<li>Multiple disciplines<\/li>\n<li>Improved computational efficiency<\/li>\n<\/ul>\n<div><\/div>\n<div><\/div>\n<div style=\"text-align: center;\"><img decoding=\"async\" class=\" size-full wp-image-25\" style=\"height: 291px; width: 300px;\" title=\"Tolerance design of gas engines\" src=\"https:\/\/sites.gc.sjtu.edu.cn\/ido\/wp-content\/uploads\/sites\/18\/2017\/06\/engine.gif\" alt=\"\" width=\"206\" height=\"200\" \/><\/div>\n<div style=\"text-align: center;\"><\/div>\n<div style=\"text-align: center;\">Fig.1 Tolerance design of gas engines<\/div>\n<div style=\"text-align: center;\"><\/div>\n<div><\/div>\n<div>Another example is system reliability.\u00a0People rely on systems more and more for manufacturing and production, and without high reliability, systems will undergo frequent failures (Fig.2), which end up with huge economic loss and affect society as a whole.<\/div>\n<div><\/div>\n<div><\/div>\n<div style=\"text-align: center;\"><img fetchpriority=\"high\" decoding=\"async\" class=\" size-full wp-image-26\" style=\"height: 300px; width: 750px;\" src=\"https:\/\/sites.gc.sjtu.edu.cn\/ido\/wp-content\/uploads\/sites\/18\/2017\/06\/fig2.png\" alt=\"\" width=\"1116\" height=\"343\" srcset=\"https:\/\/sites.gc.sjtu.edu.cn\/ido\/wp-content\/uploads\/sites\/18\/2017\/06\/fig2.png 1116w, https:\/\/sites.gc.sjtu.edu.cn\/ido\/wp-content\/uploads\/sites\/18\/2017\/06\/fig2-300x92.png 300w, https:\/\/sites.gc.sjtu.edu.cn\/ido\/wp-content\/uploads\/sites\/18\/2017\/06\/fig2-1024x315.png 1024w, https:\/\/sites.gc.sjtu.edu.cn\/ido\/wp-content\/uploads\/sites\/18\/2017\/06\/fig2-768x236.png 768w\" sizes=\"(max-width: 1116px) 100vw, 1116px\" \/><\/div>\n<div><\/div>\n<div><\/div>\n<div style=\"text-align: center;\">Fig.2\u00a0System failures<\/div>\n<div><\/div>\n<div>\n<div>In order to improve system reliability, our goal \u00a0is to\u00a0develop efficient robust optimization approaches and multi-disciplinary optimization methods with applications on various kinds of complex engineering systems.<\/div>\n<div><\/div>\n<h1>Methodology<\/h1>\n<hr \/>\n<\/div>\n<div>Basically optimization is to find &#8220;best available&#8221; values of some objective function defined in a domain consisting of some constraints, and robust optimization is to find &#8220;best available&#8221; values when uncertainty exists (variations in variables\/parameters) (Fig.3).<\/div>\n<div><\/div>\n<div style=\"text-align: center;\"><img decoding=\"async\" class=\" size-full wp-image-27\" src=\"https:\/\/sites.gc.sjtu.edu.cn\/ido\/wp-content\/uploads\/sites\/18\/2017\/06\/fig3.png\" alt=\"\" width=\"684\" height=\"221\" srcset=\"https:\/\/sites.gc.sjtu.edu.cn\/ido\/wp-content\/uploads\/sites\/18\/2017\/06\/fig3.png 684w, https:\/\/sites.gc.sjtu.edu.cn\/ido\/wp-content\/uploads\/sites\/18\/2017\/06\/fig3-300x97.png 300w\" sizes=\"(max-width: 684px) 100vw, 684px\" \/><\/div>\n<div><\/div>\n<div style=\"text-align: center;\">Fig.3 Multi-disciplinary optimization<\/div>\n<div><\/div>\n<div>We focus on single-disciplinary and multi-disciplinary optimization strategies incorporating robust optimization design into complex systems. The areas are (but not limited to):<\/div>\n<ul>\n<li>Single-objective Robust Optimiztion (RO) based on Sequential Quadratic Programming (SQP)<\/li>\n<li>\n<div>Hybrid multi-objective RO based on Differential Evolution (DE)<\/div>\n<\/li>\n<li>\n<div class=\"O0\" style=\"margin-top: 0pt; margin-bottom: 0pt; margin-left: 0.38in; text-indent: -0.38in;\">Sensitivity analysis<\/div>\n<\/li>\n<li>\n<div class=\"O0\" style=\"margin-top: 0pt; margin-bottom: 0pt; margin-left: 0.38in; text-indent: -0.38in;\">RO considering model uncertainty<\/div>\n<\/li>\n<li>\n<div class=\"O0\" style=\"margin-top: 0pt; margin-bottom: 0pt; margin-left: 0.38in; text-indent: -0.38in;\">Deterministic Multi-disciplinary Optimization (MDO)<\/div>\n<\/li>\n<li>\n<div class=\"O0\" style=\"margin-top: 0pt; margin-bottom: 0pt; margin-left: 0.38in; text-indent: -0.38in;\">Robust MDO<\/div>\n<\/li>\n<li>\n<div class=\"O0\" style=\"margin-top: 0pt; margin-bottom: 0pt; margin-left: 0.38in; text-indent: -0.38in;\">System configuration improvement<\/div>\n<\/li>\n<\/ul>\n<h1><\/h1>\n<h1>Students<\/h1>\n<hr \/>\n<div><\/div>\n<div>Yanjun Zhang, Tingting Xia, JizhouZhang, Zixi Han<\/div>\n<div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Background Design optimization \u00a0under uncertainty is one of the most important topics in complex engineering systems. For instance, in engineering design optimization of gas engines (Fig.1), we may have to consider: Uncertainty due to uncontrollable variations Multiple disciplines Improved computational efficiency Fig.1 Tolerance design of gas engines Another example is system reliability.\u00a0People rely on systems [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":4,"comment_status":"closed","ping_status":"closed","template":"","meta":{"site-sidebar-layout":"default","site-content-layout":"default","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":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"class_list":["post-28","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/sites.gc.sjtu.edu.cn\/ido\/wp-json\/wp\/v2\/pages\/28","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sites.gc.sjtu.edu.cn\/ido\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/sites.gc.sjtu.edu.cn\/ido\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/sites.gc.sjtu.edu.cn\/ido\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/sites.gc.sjtu.edu.cn\/ido\/wp-json\/wp\/v2\/comments?post=28"}],"version-history":[{"count":1,"href":"https:\/\/sites.gc.sjtu.edu.cn\/ido\/wp-json\/wp\/v2\/pages\/28\/revisions"}],"predecessor-version":[{"id":151,"href":"https:\/\/sites.gc.sjtu.edu.cn\/ido\/wp-json\/wp\/v2\/pages\/28\/revisions\/151"}],"wp:attachment":[{"href":"https:\/\/sites.gc.sjtu.edu.cn\/ido\/wp-json\/wp\/v2\/media?parent=28"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}