{"id":58507,"date":"2024-02-02T18:04:21","date_gmt":"2024-02-02T18:04:21","guid":{"rendered":"https:\/\/www.africa-press.net\/tchad\/politique\/des-insectes-inspirent-les-plus-petits-robots-du-monde"},"modified":"2024-02-02T19:52:32","modified_gmt":"2024-02-02T19:52:32","slug":"des-insectes-inspirent-les-plus-petits-robots-du-monde","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/des-insectes-inspirent-les-plus-petits-robots-du-monde","title":{"rendered":"Des insectes inspirent les plus petits robots du monde"},"content":{"rendered":"

Africa-Press – Tchad. <\/strong><\/span>A l\u2019universite\u0301 d\u2019Etat de Washington (Etats-Unis), des chercheurs de la faculte\u0301 de me\u0301canique et de ge\u0301nie des mate\u0301riaux estiment avoir conc\u0327u les plus petits robots du monde jusque-la\u0300. Et pour cause, l\u2019un mesure 8,5 millime\u0300tres de long et pe\u0300se 8 milligrammes quand l\u2019autre mesure 22 millime\u0300tres pour 55 milligrammes. En collaboration avec un fabricant de drones volants, Flyby Robotics, les chercheurs ont pre\u0301sente\u0301 leur projet en de\u0301cembre 2023 a\u0300 la confe\u0301rence internationale sur les robots et syste\u0300mes intelligents.<\/p>\n

Leurs robots, le MiniBug et le WaterStrider, sont inspire\u0301s d\u2019insectes, le second imitant pre\u0301cise\u0301ment une araigne\u0301e d\u2019eau comme son nom l\u2019indique, et ont la faculte\u0301 de se de\u0301placer a\u0300 la vitesse de six millime\u0300tres a\u0300 la seconde. Mais le tout sans motorisation. Ils fonctionnent gra\u0302ce a\u0300 un minuscule actionneur en mate\u0301riau a\u0300 me\u0301moire de forme, et c\u2019est d\u2019ailleurs cet e\u0301le\u0301ment qui fait l\u2019objet du papier de recherche.<\/p>\n

\u00ab\u00a0L\u2019impression que le Minibug flotte\u00a0\u00bb<\/b><\/p>\n

Mesurant 7 mm pour un peu moins d\u2019un milligramme, il est fait en nitinol, un alliage de titane et de nickel. Il a la faculte\u0301 de se contracter sous l\u2019effet de la chaleur. Celle-ci est applique\u0301e par des impulsions e\u0301lectriques transmises par un fil de cuivre. Les contractions de l\u2019actionneur succe\u0300dent aux retours a\u0300 la position initiale, ce qui fait vibrer les pattes des robots et provoque leur de\u0301placement.<\/p>\n

L\u2019e\u0301quipe a teste\u0301 plusieurs fre\u0301quences de courant. Le MiniBug se met a\u0300 \u00ab\u00a0galoper\u00a0\u00bb, selon le terme de l\u2019article, a\u0300 des fre\u0301quences de 10, 15 et 20 Hz. Cela dit, il y a peu de diffe\u0301rence de vitesse entre 15 et 20 Hz. A 40 Hz, les pattes ne semblent plus bouger et le robot avance moins vite. \u00ab\u00a0Les pattes touchent toujours le sol mais la haute fre\u0301quence de vibration du mode a\u0300 40 Hz provoque un de\u0301placement me\u0302me si le mouvement de l\u2019actionneur n\u2019est pas visible, ce qui donne l\u2019impression que le Minibug flotte\u00a0\u00bb, note Conor Trygstad, coauteur de l\u2019e\u0301tude. Les actionneurs vibrent plus vite mais leurs mouvements sont moins amples, ce qui a pour effet de re\u0301duire la vitesse du robot.<\/p>\n

Des usages varie\u0301s<\/b><\/p>\n

Le WaterStrider se de\u0301place sur l\u2019eau. Deux propulseurs ressemblant a\u0300 des ailes sont contro\u0302le\u0301s chacun par un actionneur. En activer un tout en laissant l\u2019autre au repos permet de faire changer de direction au robot. Le de\u0301placement a e\u0301te\u0301 teste\u0301 avec du courant a\u0300 1 et 2 Hz mais le virage est ope\u0301re\u0301 a\u0300 5 Hz.<\/p>\n

A ce stade, le projet est surtout une preuve de concept pour un syste\u0300me de locomotion simple et le\u0301ger. Les usages de tels robots, eux, pourraient e\u0302tre assez varie\u0301s. Les chercheurs citent la pollinisation artificielle mais aussi des missions de recherche et secours ou la surveillance d\u2019un milieu environnementale.<\/p>\n

Pour plus d’informations et d’analyses sur la Tchad<\/a>, suivez Africa-Press<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

Africa-Press – Tchad. A l\u2019universite\u0301 d\u2019Etat de Washington (Etats-Unis), des chercheurs de la faculte\u0301 de me\u0301canique et de ge\u0301nie des mate\u0301riaux estiment avoir conc\u0327u les plus petits robots du monde jusque-la\u0300. Et pour cause, l\u2019un mesure 8,5 millime\u0300tres de long et pe\u0300se 8 milligrammes quand l\u2019autre mesure 22 millime\u0300tres pour 55 milligrammes. En collaboration avec […]<\/p>\n","protected":false},"author":82,"featured_media":58506,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,10],"tags":[37,292,29],"class_list":["post-58507","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-divers","category-toutes-les-actualites","tag-africa-press","tag-africa-press-tchad","tag-tchad"],"yoast_head":"\nDes insectes inspirent les plus petits robots du monde - tchad<\/title>\n<meta name=\"description\" content=\"A l\u2019universite\u0301 d\u2019Etat de Washington (Etats-Unis), des chercheurs de la faculte\u0301 de me\u0301canique et de ge\u0301nie des mate\u0301ria ...\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/des-insectes-inspirent-les-plus-petits-robots-du-monde\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Des insectes inspirent les plus petits robots du monde\" \/>\n<meta property=\"og:description\" content=\"A l\u2019universite\u0301 d\u2019Etat de Washington (Etats-Unis), des chercheurs de la faculte\u0301 de me\u0301canique et de ge\u0301nie des mate\u0301ria ...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/des-insectes-inspirent-les-plus-petits-robots-du-monde\" \/>\n<meta property=\"og:site_name\" content=\"tchad\" \/>\n<meta property=\"article:published_time\" content=\"2024-02-02T18:04:21+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-02-02T19:52:32+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/static.africa-press.net\/tchad\/sites\/41\/2024\/02\/sm_1706885733.186967.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"900\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"cfeditorfr\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"cfeditorfr\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/des-insectes-inspirent-les-plus-petits-robots-du-monde#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/des-insectes-inspirent-les-plus-petits-robots-du-monde\"},\"author\":{\"name\":\"cfeditorfr\",\"@id\":\"https:\/\/www.africa-press.net\/tchad\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1\"},\"headline\":\"Des insectes inspirent les plus petits robots du monde\",\"datePublished\":\"2024-02-02T18:04:21+00:00\",\"dateModified\":\"2024-02-02T19:52:32+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/des-insectes-inspirent-les-plus-petits-robots-du-monde\"},\"wordCount\":526,\"commentCount\":0,\"image\":{\"@id\":\"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/des-insectes-inspirent-les-plus-petits-robots-du-monde#primaryimage\"},\"thumbnailUrl\":\"https:\/\/static.africa-press.net\/tchad\/sites\/41\/2024\/02\/sm_1706885733.186967.jpg\",\"keywords\":[\"Africa Press\",\"Africa Press-Tchad\",\"Tchad\"],\"articleSection\":[\"Divers\",\"Toutes les actualit\u00e9s\"],\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/des-insectes-inspirent-les-plus-petits-robots-du-monde#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/des-insectes-inspirent-les-plus-petits-robots-du-monde\",\"url\":\"https:\/\/www.africa-press.net\/tchad\/toutes-les-actualites\/des-insectes-inspirent-les-plus-petits-robots-du-monde\",\"name\":\"Des insectes inspirent les plus petits robots du monde - 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