{"id":874,"date":"2024-10-09T17:00:34","date_gmt":"2024-10-09T08:00:34","guid":{"rendered":"https:\/\/www.kikulab.it-chiba.ac.jp\/Eng\/?page_id=874"},"modified":"2026-04-13T16:12:22","modified_gmt":"2026-04-13T07:12:22","slug":"on-water-running-robot","status":"publish","type":"page","link":"https:\/\/www.kikulab.chibatech.ac.jp\/Eng\/research\/small-legged-robot\/on-water-running-robot\/","title":{"rendered":"On-water Running Robot"},"content":{"rendered":"<div data-colibri-id=\"874-c1\" class=\"style-483 style-local-874-c1 position-relative\">\n  <!---->\n  <div data-colibri-component=\"section\" data-colibri-id=\"874-c2\" id=\"initial-content\" class=\"h-section h-section-global-spacing d-flex align-items-lg-center align-items-md-center align-items-center style-484 style-local-874-c2 position-relative\">\n    <!---->\n    <!---->\n    <div class=\"h-section-grid-container h-section-boxed-container\">\n      <!---->\n      <div data-colibri-id=\"874-c3\" class=\"h-row-container gutters-row-lg-2 gutters-row-md-2 gutters-row-0 gutters-row-v-lg-2 gutters-row-v-md-2 gutters-row-v-2 style-697 style-local-874-c3 position-relative\">\n        <!---->\n        <div class=\"h-row justify-content-lg-center justify-content-md-center justify-content-center align-items-lg-stretch align-items-md-stretch align-items-stretch gutters-col-lg-2 gutters-col-md-2 gutters-col-0 gutters-col-v-lg-2 gutters-col-v-md-2 gutters-col-v-2\">\n          <!---->\n          <div class=\"h-column h-column-container d-flex h-col-lg-auto h-col-md-auto h-col-auto style-698-outer style-local-874-c4-outer\">\n            <div data-colibri-id=\"874-c4\" class=\"d-flex h-flex-basis h-column__inner h-px-lg-2 h-px-md-2 h-px-2 v-inner-lg-2 v-inner-md-2 v-inner-2 style-698 style-local-874-c4 position-relative\">\n              <!---->\n              <!---->\n              <div class=\"w-100 h-y-container h-column__content h-column__v-align flex-basis-100 align-self-lg-start align-self-md-start align-self-start\">\n                <!---->\n                <div data-colibri-id=\"874-c5\" class=\"h-text h-text-component style-699 style-local-874-c5 position-relative h-element\">\n                  <!---->\n                  <!---->\n                  <div class=\"\">\n                    <p>Small legged robot can run on the water surface because of scaling effect. While the reaction from the water surface is proportional to the leg area, (length squared) the weight is proportional to the volume (length cubed). Therefore\n                      the small object is difficult to sink. It seems that basilisk lizards less than 200g can run on the water surface.&nbsp;Water striders do not even sink due to the surface tension. The surface tension is proportional to the length.\n                      We are developing a cm-scale on-water running robot with legs.&nbsp;<\/p>\n                  <\/div>\n                <\/div>\n              <\/div>\n            <\/div>\n          <\/div>\n        <\/div>\n      <\/div>\n      <div data-colibri-id=\"874-c6\" class=\"h-row-container gutters-row-lg-1 gutters-row-md-1 gutters-row-0 gutters-row-v-lg-1 gutters-row-v-md-1 gutters-row-v-1 style-488 style-local-874-c6 position-relative\">\n        <!---->\n        <div class=\"h-row justify-content-lg-center justify-content-md-center justify-content-center align-items-lg-stretch align-items-md-stretch align-items-stretch gutters-col-lg-1 gutters-col-md-1 gutters-col-0 gutters-col-v-lg-1 gutters-col-v-md-1 gutters-col-v-1\">\n          <!---->\n          <div class=\"h-column h-column-container d-flex h-col-lg-auto h-col-md-auto h-col-auto style-489-outer style-local-874-c7-outer\">\n            <div data-colibri-id=\"874-c7\" class=\"d-flex h-flex-basis h-column__inner h-px-lg-1 h-px-md-1 h-px-1 v-inner-lg-1 v-inner-md-1 v-inner-1 style-489 style-local-874-c7 position-relative\">\n              <!---->\n              <!---->\n              <div class=\"w-100 h-y-container h-column__content h-column__v-align flex-basis-100 align-self-lg-start align-self-md-start align-self-start\">\n                <!---->\n                <div data-colibri-component=\"video\" data-colibri-id=\"874-c8\" class=\"d-block h-video d-block h-video style-502 style-local-874-c8 position-relative h-element\">\n                  <!---->\n                  <!---->\n                  <div class=\"video-container position-relative\">\n                    <div class=\"h-global-transition-all ratio-inner\"><iframe src=https:\/\/www.youtube.com\/embed\/ZGEQ8auyWlA?autoplay=0&#038;mute=0&#038;modestbranding=0&#038;rel=0&#038;enablejsapi=1&#038; class='h-video-main'  allowfullscreen><\/iframe><\/div>\n                  <\/div>\n                <\/div>\n              <\/div>\n            <\/div>\n          <\/div>\n          <div class=\"h-column h-column-container d-flex h-col-lg-auto h-col-md-auto h-col-auto style-491-outer style-local-874-c10-outer\">\n            <div data-colibri-id=\"874-c10\" class=\"d-flex h-flex-basis h-column__inner h-px-lg-2 h-px-md-2 h-px-2 v-inner-lg-2 v-inner-md-2 v-inner-2 style-491 style-local-874-c10 position-relative\">\n              <!---->\n              <!---->\n              <div class=\"w-100 h-y-container h-column__content h-column__v-align flex-basis-100 align-self-lg-start align-self-md-start align-self-start\">\n                <!---->\n                <div data-colibri-id=\"874-c11\" class=\"h-text h-text-component style-500 style-local-874-c11 position-relative h-element\">\n                  <!---->\n                  <!---->\n                  <div class=\"\">\n                    <p>Four legged robot with tail (Otsuka model 2011):<\/p>\n                    <p>\n                      <br>\n                    <\/p>\n                  <\/div>\n                <\/div>\n              <\/div>\n            <\/div>\n          <\/div>\n        <\/div>\n      <\/div>\n      <div data-colibri-id=\"874-c12\" class=\"h-row-container gutters-row-lg-1 gutters-row-md-1 gutters-row-0 gutters-row-v-lg-1 gutters-row-v-md-1 gutters-row-v-1 style-492 style-local-874-c12 position-relative\">\n        <!---->\n        <div class=\"h-row justify-content-lg-center justify-content-md-center justify-content-center align-items-lg-stretch align-items-md-stretch align-items-stretch gutters-col-lg-1 gutters-col-md-1 gutters-col-0 gutters-col-v-lg-1 gutters-col-v-md-1 gutters-col-v-1\">\n          <!---->\n          <div class=\"h-column h-column-container d-flex h-col-lg-auto h-col-md-auto h-col-auto style-493-outer style-local-874-c13-outer\">\n            <div data-colibri-id=\"874-c13\" class=\"d-flex h-flex-basis h-column__inner h-px-lg-1 h-px-md-1 h-px-1 v-inner-lg-1 v-inner-md-1 v-inner-1 style-493 style-local-874-c13 position-relative\">\n              <!---->\n              <!---->\n              <div class=\"w-100 h-y-container h-column__content h-column__v-align flex-basis-100 align-self-lg-start align-self-md-start align-self-start\">\n                <!---->\n                <div data-colibri-component=\"video\" data-colibri-id=\"874-c14\" class=\"d-block h-video d-block h-video style-504 style-local-874-c14 position-relative h-element\">\n                  <!---->\n                  <!---->\n                  <div class=\"video-container position-relative\">\n                    <div class=\"h-global-transition-all ratio-inner\"><iframe src=https:\/\/www.youtube.com\/embed\/w37NEhPBZaM?autoplay=0&#038;mute=0&#038;modestbranding=0&#038;rel=0&#038;enablejsapi=1&#038; class='h-video-main'  allowfullscreen><\/iframe><\/div>\n                  <\/div>\n                <\/div>\n              <\/div>\n            <\/div>\n          <\/div>\n          <div class=\"h-column h-column-container d-flex h-col-lg-auto h-col-md-auto h-col-auto style-495-outer style-local-874-c16-outer\">\n            <div data-colibri-id=\"874-c16\" class=\"d-flex h-flex-basis h-column__inner h-px-lg-2 h-px-md-2 h-px-2 v-inner-lg-2 v-inner-md-2 v-inner-2 style-495 style-local-874-c16 position-relative\">\n              <!---->\n              <!---->\n              <div class=\"w-100 h-y-container h-column__content h-column__v-align flex-basis-100 align-self-lg-start align-self-md-start align-self-start\">\n                <!---->\n                <div data-colibri-id=\"874-c17\" class=\"h-text h-text-component style-501 style-local-874-c17 position-relative h-element\">\n                  <!---->\n                  <!---->\n                  <div class=\"\">\n                    <p>Four legged robot without a tail (Otani model 2014):<\/p>\n                  <\/div>\n                <\/div>\n              <\/div>\n            <\/div>\n          <\/div>\n        <\/div>\n      <\/div>\n      <div data-colibri-id=\"874-c18\" class=\"h-row-container gutters-row-lg-2 gutters-row-md-2 gutters-row-0 gutters-row-v-lg-2 gutters-row-v-md-2 gutters-row-v-2 style-700 style-local-874-c18 position-relative\">\n        <!---->\n        <div class=\"h-row justify-content-lg-center justify-content-md-center justify-content-center align-items-lg-stretch align-items-md-stretch align-items-stretch gutters-col-lg-2 gutters-col-md-2 gutters-col-0 gutters-col-v-lg-2 gutters-col-v-md-2 gutters-col-v-2\">\n          <!---->\n          <div class=\"h-column h-column-container d-flex h-col-lg-auto h-col-md-auto h-col-auto style-701-outer style-local-874-c19-outer\">\n            <div data-colibri-id=\"874-c19\" class=\"d-flex h-flex-basis h-column__inner h-px-lg-2 h-px-md-2 h-px-2 v-inner-lg-2 v-inner-md-2 v-inner-2 style-701 style-local-874-c19 position-relative\">\n              <!---->\n              <!---->\n              <div class=\"w-100 h-y-container h-column__content h-column__v-align flex-basis-100 align-self-lg-start align-self-md-start align-self-start\">\n                <!---->\n                <div data-colibri-component=\"video\" data-colibri-id=\"874-c20\" class=\"d-block h-video d-block h-video style-702 style-local-874-c20 position-relative h-element\">\n                  <!---->\n                  <!---->\n                  <div class=\"video-container position-relative\">\n                    <div class=\"h-global-transition-all ratio-inner\"><iframe src=https:\/\/www.youtube.com\/embed\/zSQbQhbigW4?autoplay=0&#038;mute=0&#038;modestbranding=0&#038;rel=0&#038;enablejsapi=1&#038; class='h-video-main'  allowfullscreen><\/iframe><\/div>\n                  <\/div>\n                <\/div>\n              <\/div>\n            <\/div>\n          <\/div>\n          <div class=\"h-column h-column-container d-flex h-col-lg-auto h-col-md-auto h-col-auto style-704-outer style-local-874-c22-outer\">\n            <div data-colibri-id=\"874-c22\" class=\"d-flex h-flex-basis h-column__inner h-px-lg-2 h-px-md-2 h-px-2 v-inner-lg-2 v-inner-md-2 v-inner-2 style-704 style-local-874-c22 position-relative\">\n              <!---->\n              <!---->\n              <div class=\"w-100 h-y-container h-column__content h-column__v-align flex-basis-100 align-self-lg-start align-self-md-start align-self-start\">\n                <!---->\n                <div data-colibri-id=\"874-c23\" class=\"h-text h-text-component style-705 style-local-874-c23 position-relative h-element\">\n                  <!---->\n                  <!---->\n                  <div class=\"\">\n                    <p>On-water locomotion simulation by FSI:<\/p>\n                    <p>Under analyzing&#8230;..<\/p>\n                  <\/div>\n                <\/div>\n              <\/div>\n            <\/div>\n          <\/div>\n        <\/div>\n      <\/div>\n      <div data-colibri-id=\"874-c24\" class=\"h-row-container gutters-row-lg-2 gutters-row-md-2 gutters-row-0 gutters-row-v-lg-2 gutters-row-v-md-2 gutters-row-v-2 style-1385 style-local-874-c24 position-relative\">\n        <!---->\n        <div class=\"h-row justify-content-lg-center justify-content-md-center justify-content-center align-items-lg-stretch align-items-md-stretch align-items-stretch gutters-col-lg-2 gutters-col-md-2 gutters-col-0 gutters-col-v-lg-2 gutters-col-v-md-2 gutters-col-v-2\">\n          <!---->\n          <div class=\"h-column h-column-container d-flex h-col-lg-auto h-col-md-auto h-col-auto style-1386-outer style-local-874-c25-outer\">\n            <div data-colibri-id=\"874-c25\" class=\"d-flex h-flex-basis h-column__inner h-px-lg-2 h-px-md-2 h-px-2 v-inner-lg-2 v-inner-md-2 v-inner-2 style-1386 style-local-874-c25 position-relative\">\n              <!---->\n              <!---->\n              <div class=\"w-100 h-y-container h-column__content h-column__v-align flex-basis-100 align-self-lg-start align-self-md-start align-self-start\">\n                <!---->\n                <div data-colibri-component=\"video\" data-colibri-id=\"874-c27\" class=\"d-block h-video d-block h-video style-1388 style-local-874-c27 position-relative h-element\">\n                  <!---->\n                  <!---->\n                  <div class=\"video-container position-relative\">\n                    <div class=\"h-global-transition-all ratio-inner\"><iframe src=https:\/\/www.youtube.com\/embed\/e1EDPB9ERCA?autoplay=0&#038;mute=0&#038;modestbranding=0&#038;rel=0&#038;enablejsapi=1&#038; class='h-video-main'  allowfullscreen><\/iframe><\/div>\n                  <\/div>\n                <\/div>\n              <\/div>\n            <\/div>\n          <\/div>\n          <div class=\"h-column h-column-container d-flex h-col-lg-auto h-col-md-auto h-col-auto style-1387-outer style-local-874-c26-outer\">\n            <div data-colibri-id=\"874-c26\" class=\"d-flex h-flex-basis h-column__inner h-px-lg-2 h-px-md-2 h-px-2 v-inner-lg-2 v-inner-md-2 v-inner-2 style-1387 style-local-874-c26 position-relative\">\n              <!---->\n              <!---->\n              <div class=\"w-100 h-y-container h-column__content h-column__v-align flex-basis-100 align-self-lg-start align-self-md-start align-self-start\">\n                <!---->\n                <div data-colibri-id=\"874-c29\" class=\"h-text h-text-component style-1390 style-local-874-c29 position-relative h-element\">\n                  <!---->\n                  <!---->\n                  <div class=\"\">\n                    <p>Test Simulation by Mls-mpm<\/p>\n                    <p>\n                      <br>\n                    <\/p>\n                  <\/div>\n                <\/div>\n              <\/div>\n            <\/div>\n          <\/div>\n        <\/div>\n      <\/div>\n    <\/div>\n  <\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Small legged robot can run on the water surface because of scaling effect. While the reaction from the water s [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":837,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"page-templates\/full-width-page.php","meta":{"footnotes":""},"class_list":["post-874","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.kikulab.chibatech.ac.jp\/Eng\/wp-json\/wp\/v2\/pages\/874","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.kikulab.chibatech.ac.jp\/Eng\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.kikulab.chibatech.ac.jp\/Eng\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.kikulab.chibatech.ac.jp\/Eng\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.kikulab.chibatech.ac.jp\/Eng\/wp-json\/wp\/v2\/comments?post=874"}],"version-history":[{"count":15,"href":"https:\/\/www.kikulab.chibatech.ac.jp\/Eng\/wp-json\/wp\/v2\/pages\/874\/revisions"}],"predecessor-version":[{"id":4267,"href":"https:\/\/www.kikulab.chibatech.ac.jp\/Eng\/wp-json\/wp\/v2\/pages\/874\/revisions\/4267"}],"up":[{"embeddable":true,"href":"https:\/\/www.kikulab.chibatech.ac.jp\/Eng\/wp-json\/wp\/v2\/pages\/837"}],"wp:attachment":[{"href":"https:\/\/www.kikulab.chibatech.ac.jp\/Eng\/wp-json\/wp\/v2\/media?parent=874"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}