{"id":3468,"date":"2026-03-10T06:55:00","date_gmt":"2026-03-10T06:55:00","guid":{"rendered":"http:\/\/www.labren.org\/mm\/?p=3468"},"modified":"2026-03-10T06:55:02","modified_gmt":"2026-03-10T06:55:02","slug":"%f0%9f%9a%80-%f0%9d%97%a6%f0%9d%97%b0%f0%9d%97%b6%f0%9d%97%b2%f0%9d%97%bb%f0%9d%97%b0%f0%9d%97%b2-%f0%9d%97%94%f0%9d%97%b1%f0%9d%98%83%f0%9d%97%ae%f0%9d%97%bb%f0%9d%97%b0%f0%9d%97%b2%f0%9d%98%80-2026","status":"publish","type":"post","link":"http:\/\/www.labren.org\/mm\/news\/%f0%9f%9a%80-%f0%9d%97%a6%f0%9d%97%b0%f0%9d%97%b6%f0%9d%97%b2%f0%9d%97%bb%f0%9d%97%b0%f0%9d%97%b2-%f0%9d%97%94%f0%9d%97%b1%f0%9d%98%83%f0%9d%97%ae%f0%9d%97%bb%f0%9d%97%b0%f0%9d%97%b2%f0%9d%98%80-2026\/","title":{"rendered":"\ud83d\ude80 \ud835\udde6\ud835\uddf0\ud835\uddf6\ud835\uddf2\ud835\uddfb\ud835\uddf0\ud835\uddf2 \ud835\uddd4\ud835\uddf1\ud835\ude03\ud835\uddee\ud835\uddfb\ud835\uddf0\ud835\uddf2\ud835\ude00 2026: Inertia-Driven Amphibious \u201cLeglessbot\u201d with Asymmetric Microundulatory Fin Arrays \ud83e\udd16\ud83c\udf0a"},"content":{"rendered":"\n

Thrilled to share our latest #\ud835\udde6\ud835\uddf0\ud835\uddf6\ud835\uddf2\ud835\uddfb\ud835\uddf0\ud835\uddf2\ud835\uddd4\ud835\uddf1\ud835\ude03\ud835\uddee\ud835\uddfb\ud835\uddf0\ud835\uddf2<\/strong> work on a \ud835\uddf0\ud835\uddf2\ud835\uddfb\ud835\ude01\ud835\uddf6\ud835\uddfa\ud835\uddf2\ud835\ude01\ud835\uddf2\ud835\uddff-\ud835\ude00\ud835\uddf0\ud835\uddee\ud835\uddf9\ud835\uddf2, \ud835\uddf3\ud835\ude02\ud835\uddf9\ud835\uddf9\ud835\ude06 \ud835\ude00\ud835\uddf2\ud835\uddee\ud835\uddf9\ud835\uddf2\ud835\uddf1, \ud835\uddf9\ud835\uddf2\ud835\uddf4\ud835\uddf9\ud835\uddf2\ud835\ude00\ud835\ude00 \ud835\uddee\ud835\uddfa\ud835\uddfd\ud835\uddf5\ud835\uddf6\ud835\uddef\ud835\uddf6\ud835\uddfc\ud835\ude02\ud835\ude00 \ud835\uddff\ud835\uddfc\ud835\uddef\ud835\uddfc\ud835\ude01 that can crawl on sand, jump, and steerably swim – powered by a \ud835\ude00\ud835\uddf6\ud835\uddfb\ud835\uddf4\ud835\uddf9\ud835\uddf2 \ud835\ude03\ud835\uddee\ud835\uddff\ud835\uddf6\ud835\uddee\ud835\uddef\ud835\uddf9\ud835\uddf2-\ud835\uddfc\ud835\ude02\ud835\ude01\ud835\uddfd\ud835\ude02\ud835\ude01 \ud835\ude03\ud835\uddfc\ud835\uddf6\ud835\uddf0\ud835\uddf2-\ud835\uddf0\ud835\uddfc\ud835\uddf6\ud835\uddf9 \ud835\uddfa\ud835\uddfc\ud835\ude01\ud835\uddfc\ud835\uddff (\ud835\udde9\ud835\uddd6\ud835\udde0).<\/p>\n\n\n\n

At small scales, reliable \ud835\ude38\ud835\ude22\ud835\ude35\ud835\ude26\ud835\ude33\ud835\ude31\ud835\ude33\ud835\ude30\ud835\ude30\ud835\ude27 \ud835\ude34\ud835\ude26\ud835\ude22\ud835\ude2d\ud835\ude2a\ud835\ude2f\ud835\ude28 is tough: transmissions and active mechanisms mean moving parts and dynamic seals that are fragile and \ud835\ude2d\ud835\ude26\ud835\ude22\ud835\ude2c-\ud835\ude31\ud835\ude33\ud835\ude30\ud835\ude2f\ud835\ude26. We wanted an amphibious robot that stays sealed and robust – yet still supports multiple locomotion modes.<\/p>\n\n\n\n

\ud83e\udde0\u2728 \ud835\uddea\ud835\uddf5\ud835\uddee\ud835\ude01 \ud835\ude04\ud835\uddf2 \ud835\uddf1\ud835\uddf2\ud835\ude03\ud835\uddf2\ud835\uddf9\ud835\uddfc\ud835\uddfd\ud835\uddf2\ud835\uddf1:<\/p>\n\n\n\n

An \ud835\uddf6\ud835\uddfb\ud835\uddf2\ud835\uddff\ud835\ude01\ud835\uddf6\ud835\uddee-\ud835\uddf1\ud835\uddff\ud835\uddf6\ud835\ude03\ud835\uddf2\ud835\uddfb \ud835\uddee\ud835\uddf0\ud835\ude01\ud835\ude02\ud835\uddee\ud835\ude01\ud835\uddf6\ud835\uddfc\ud835\uddfb + \ud835\uddfd\ud835\uddee\ud835\ude00\ud835\ude00\ud835\uddf6\ud835\ude03\ud835\uddf2 \ud835\uddfd\ud835\uddff\ud835\uddfc\ud835\uddfd\ud835\ude02\ud835\uddf9\ud835\ude00\ud835\uddf6\ud835\uddfc\ud835\uddfb \ud835\uddf1\ud835\uddf2\ud835\ude00\ud835\uddf6\ud835\uddf4\ud835\uddfb that:<\/p>\n\n\n\n

\ud83d\udd39 Uses a variable-output VCM inside a fully sealed rigid shell (no external moving parts)<\/p>\n\n\n\n

\ud83d\udd39 Switches among three modes: jumping, full-stroke vibration (land), and small-stroke vibration (water)<\/p>\n\n\n\n

\ud83d\udd39 Uses asymmetric, tilted passive fins for frequency-tuned steering in water (IDMP)<\/p>\n\n\n\n

\ud83d\udd39 Explains hydrodynamics via aquatic tests, high-speed PIV, and CFD<\/p>\n\n\n\n

All of this – \ud835\uddfc\ud835\uddfb\ud835\uddf2 \ud835\uddfa\ud835\uddee\ud835\uddf6\ud835\uddfb \ud835\uddf9\ud835\uddf6\ud835\uddfb\ud835\uddf2\ud835\uddee\ud835\uddff \ud835\uddee\ud835\uddf0\ud835\ude01\ud835\ude02\ud835\uddee\ud835\ude01\ud835\uddfc\ud835\uddff + \ud835\uddfd\ud835\uddee\ud835\ude00\ud835\ude00\ud835\uddf6\ud835\ude03\ud835\uddf2 \ud835\uddf3\ud835\uddf6\ud835\uddfb\ud835\ude00. No exposed legs, gears, or propellers – making sealing and durability much easier at the centimeter scale.<\/p>\n\n\n\n

\ud83c\udfaf \ud835\uddde\ud835\uddf2\ud835\ude06 \ud835\udde5\ud835\uddf2\ud835\ude00\ud835\ude02\ud835\uddf9\ud835\ude01\ud835\ude00:<\/p>\n\n\n\n

\u2705 24-g prototype (57.5 \u00d7 36 \u00d7 36 mm) with a fully enclosed shell<\/p>\n\n\n\n

\u2705 ~1.4 BL\/s (~78 mm\/s) on dry sand; 41.6 mm\/s on flat ground<\/p>\n\n\n\n

\u2705 Jump height up to 17.16 mm at 15 V; continuous \u201ctumbler\u201d jumping<\/p>\n\n\n\n

\u2705 Load carrying: 960 g (~40\u00d7 body weight) and escape under 5-kg loads<\/p>\n\n\n\n

\u2705 In water: min turning radius 5.6 mm; straight swim at 35\/44\/60 Hz (~32\/35\/28 mm\/s); peak yaw -22\u00b0\/s (30 Hz) or 16\u00b0\/s (40 Hz)<\/p>\n\n\n\n

\ud83d\udca1 \ud835\uddea\ud835\uddf5\ud835\ude06 \ud835\uddf6\ud835\ude01 \ud835\uddfa\ud835\uddee\ud835\ude01\ud835\ude01\ud835\uddf2\ud835\uddff\ud835\ude00:<\/p>\n\n\n\n

This work shows how inertia + mode-switchable actuation can bridge the \ud835\uddfa\ud835\uddfc\ud835\uddfa\ud835\uddf2\ud835\uddfb\ud835\ude01\ud835\ude02\ud835\uddfa-\ud835\uddf3\ud835\uddff\ud835\uddf2\ud835\uddfe\ud835\ude02\ud835\uddf2\ud835\uddfb\ud835\uddf0\ud835\ude06 \ud835\ude01\ud835\uddff\ud835\uddee\ud835\uddf1\ud835\uddf2-\ud835\uddfc\ud835\uddf3\ud835\uddf3, enabling jumping and swimming in the same tiny robot. Passive asymmetric fins turn simple reciprocation into steerable thrust – \ud835\ude04\ud835\uddf6\ud835\ude01\ud835\uddf5 \ud835\uddfb\ud835\uddfc \ud835\uddee\ud835\uddf1\ud835\uddf1\ud835\uddf2\ud835\uddf1 \ud835\uddee\ud835\uddf0\ud835\ude01\ud835\ude02\ud835\uddee\ud835\ude01\ud835\uddfc\ud835\uddff\ud835\ude00.<\/p>\n\n\n\n

\ud83c\udf31 \ud835\uddea\ud835\uddf5\ud835\uddee\ud835\ude01\u2019\ud835\ude00 \ud835\uddfb\ud835\uddf2\ud835\ude05\ud835\ude01?<\/p>\n\n\n\n

Future work will focus on improving environmental adaptability via \ud835\ude27\ud835\ude26\ud835\ude26\ud835\ude25\ud835\ude23\ud835\ude22\ud835\ude24\ud835\ude2c \ud835\ude24\ud835\ude30\ud835\ude2f\ud835\ude35\ud835\ude33\ud835\ude30\ud835\ude2d and adaptive structures, and optimizing energy efficiency + onboard power \ud835\ude2e\ud835\ude2a\ud835\ude2f\ud835\ude2a\ud835\ude22\ud835\ude35\ud835\ude36\ud835\ude33\ud835\ude2a\ud835\ude3b\ud835\ude22\ud835\ude35\ud835\ude2a\ud835\ude30\ud835\ude2f.<\/p>\n\n\n\n

Special shoutout to the team –<\/p>\n\n\n\n

Lingqi Tang<\/a>, Yongzun Yang (co-first authors), Bing Li, Bingfu Zhang, Qiguang He<\/a>, Hongliang Ren<\/a>, Yao Li – for making this project possible.<\/p>\n\n\n\n

\ud83d\udd17 Paper link: https:\/\/lnkd.in\/gFDfZYKq<\/p>\n\n\n\n

\ud83d\udd16 #ScienceAdvances<\/strong> #Robotics<\/strong> #AmphibiousRobots<\/strong> #Microrobots<\/strong> #InertiaDriven<\/strong> #Locomotion<\/strong> #VCM<\/strong> #PIV<\/strong> #CFD<\/strong><\/p>\n\n\n\n

\"No<\/figure>\n","protected":false},"excerpt":{"rendered":"

Thrilled to share our latest #\ud835\udde6\ud835\uddf0\ud835\uddf6\ud835\uddf2\ud835\uddfb\ud835\uddf0\ud835\uddf2\ud835\uddd4\ud835\uddf1\ud835\ude03\ud835\uddee\ud835\uddfb\ud835\uddf0\ud835\uddf2 work on a \ud835\uddf0\ud835\uddf2\ud835\uddfb\ud835\ude01\ud835\uddf6\ud835\uddfa\ud835\uddf2\ud835\ude01\ud835\uddf2\ud835\uddff-\ud835\ude00\ud835\uddf0\ud835\uddee\ud835\uddf9\ud835\uddf2, \ud835\uddf3\ud835\ude02\ud835\uddf9\ud835\uddf9\ud835\ude06 \ud835\ude00\ud835\uddf2\ud835\uddee\ud835\uddf9\ud835\uddf2\ud835\uddf1, \ud835\uddf9\ud835\uddf2\ud835\uddf4\ud835\uddf9\ud835\uddf2\ud835\ude00\ud835\ude00 \ud835\uddee\ud835\uddfa\ud835\uddfd\ud835\uddf5\ud835\uddf6\ud835\uddef\ud835\uddf6\ud835\uddfc\ud835\ude02\ud835\ude00 \ud835\uddff\ud835\uddfc\ud835\uddef\ud835\uddfc\ud835\ude01 that can crawl on sand, jump, and steerably swim – powered by a \ud835\ude00\ud835\uddf6\ud835\uddfb\ud835\uddf4\ud835\uddf9\ud835\uddf2 \ud835\ude03\ud835\uddee\ud835\uddff\ud835\uddf6\ud835\uddee\ud835\uddef\ud835\uddf9\ud835\uddf2-\ud835\uddfc\ud835\ude02\ud835\ude01\ud835\uddfd\ud835\ude02\ud835\ude01 \ud835\ude03\ud835\uddfc\ud835\uddf6\ud835\uddf0\ud835\uddf2-\ud835\uddf0\ud835\uddfc\ud835\uddf6\ud835\uddf9 \ud835\uddfa\ud835\uddfc\ud835\ude01\ud835\uddfc\ud835\uddff (\ud835\udde9\ud835\uddd6\ud835\udde0). At small scales, reliable \ud835\ude38\ud835\ude22\ud835\ude35\ud835\ude26\ud835\ude33\ud835\ude31\ud835\ude33\ud835\ude30\ud835\ude30\ud835\ude27 \ud835\ude34\ud835\ude26\ud835\ude22\ud835\ude2d\ud835\ude2a\ud835\ude2f\ud835\ude28 is tough: transmissions and active mechanisms mean moving parts and dynamic\u2026 Continue reading<\/a><\/p>\n","protected":false},"author":17,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"footnotes":""},"categories":[4],"tags":[],"class_list":["post-3468","post","type-post","status-publish","format-standard","hentry","category-news"],"_links":{"self":[{"href":"http:\/\/www.labren.org\/mm\/wp-json\/wp\/v2\/posts\/3468","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.labren.org\/mm\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.labren.org\/mm\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.labren.org\/mm\/wp-json\/wp\/v2\/users\/17"}],"replies":[{"embeddable":true,"href":"http:\/\/www.labren.org\/mm\/wp-json\/wp\/v2\/comments?post=3468"}],"version-history":[{"count":1,"href":"http:\/\/www.labren.org\/mm\/wp-json\/wp\/v2\/posts\/3468\/revisions"}],"predecessor-version":[{"id":3469,"href":"http:\/\/www.labren.org\/mm\/wp-json\/wp\/v2\/posts\/3468\/revisions\/3469"}],"wp:attachment":[{"href":"http:\/\/www.labren.org\/mm\/wp-json\/wp\/v2\/media?parent=3468"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.labren.org\/mm\/wp-json\/wp\/v2\/categories?post=3468"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.labren.org\/mm\/wp-json\/wp\/v2\/tags?post=3468"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}