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ID:28101591
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页数:4页
时间:2018-12-08
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1、机器人可以模仿消失的蟑螂 ETRobotsMimicDisappearingCockroaches ThisisanAmericancockroachunderaledge.Credit:Jean-MichelMongeauandPaulineJennings.CourtesyofPolyPEDALLabUCBerkeley.Viewfullsizeimage Arobotthatcopieshowcockroachesandgeckoscandisappearunderledgesinthebli
2、nkofaneyecouldleadtosearch-and-rescuedroidswithanimal-likemaneuverability,researcherssay. ScienTIstsregularlylooktonatureforinspiraTIonwhendesigningrobots,withthehopeoflearningfrommillionsofyearsofevoluTIon.Recentexamplesincludedroidsthatmimicthecheetah‘ss
3、trideorthelegsofvelociraptor. Whilemonitoringacockroachwithhigh-speedvideocamerastoseehowitcrossedgapswhilerunningathighspeeds,“weweresurprisedtofindtheinsectgone,”saidresearcherRobertFull,anintegraTIvebiologistattheUniversityofCaliforniaatBerkeley. “Afte
4、rsearching,wediscovereditupside-downundertheledge,”Fullsaid.“Aftercloseinspectionofthevideo,wesawthatthecockroachwasusingitslegsasgrapplinghooksbyengagingitsclawsatthetipoftheledge.” [BugJuice:TurningRoachesintoLivingFuelCells] Thescientiststhensawthatgec
5、kosinthelabcouldalsorunoffledgesatfullspeedandcarryoutthispendulumlikeflip,dubbed“rapidinversion,”usinghookliketoenailstoswingthemselvesfullyaroundtolandfirmlyontheundersidesofplatforms.TheresearchersthencontactedintegrativebiologistArdianJusufiwhowasstudyi
6、nggeckosinthefieldintherainforestsofSingaporetoseeifthelizardsdoveoverledgesthesamewayinthewild. “Wewonderedwhetherthiswasabehaviorreallyusedinnaturetoescapepredators,”Fullsaid.“Tohissurprise,hefoundthatageckochasedtotheendofabrokenBird’sNestFernleafalsodi
7、sappeared.Usinghigh-speedvideo,heshowedthatgeckosusedrapidinversion,justasobservedinthelaboratory.” Apparentlytheanimalscangrabanedgewiththeirclaws—sometimesusingonlyoneleg,inthecaseofroaches—andretain75percentoftheirrunningenergyastheyswinglikependulumsbe
8、neathit.Theyexperienceaboutthreetofivetimestheforceofgravitywiththeflip,similartowhathumansfeelatthebottomofabungeejump,saidresearcherJean-MichelMongeauattheUniversityofCaliforniaatBerkeley. Thesefind
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