Bionic Characteristic Of Distycus' Sucking Discs And The Analog Simulation Study On Vacuum Multi-sucking Discs

At present, by studying the development status of vacuum suck style wallclimbing robot at home and abroad, we realize that the key points mainly focus onbasic structure and control system of a robot, but there are few literatures mentionedabout the study of vacuum sucker. Recently, this style of robot still uses variousvacuum suckers in industrial production. Because one style of sucker can not beapplied to any surfaces morphology, which not only influence the moving efficiencybut also threatens the stability of a wall climbing robot. Therefore, making out theproblem of stability on any wall has become an important subject recently.From the view of bionics, we studied the structure of male Cytister bengalensisAube's vacuum sucking disc, and put the useful biological information to the designof vacuum multi-sucking discs to bring out bionic function. The science worth onpaper is based on trying to express the absorb mechanism, perfect and expand bionictheory and application。This achievement will broaden the area of activity, and makefor better application of robot, and play an role of the function of directing for deeperresearch.This thesis consists of three parts as a whole. The first part is experiment, thesecond part is computer simulation test. The third part is tension experiment.At first, to collect information about the living habit of animals having suckingdisc in the first part. By doing a comparative analysis,to determine the suckers in thefront feet of Distycus to be the subject investigated primarily before looking at thesuckers in the front feet of Distycus through a microscope. To acquire the structuralinformation of multi-sucking discs about two styles of arrangement. By doing acomparative analysis between dorsal and leathery wing in microscopic surfacestructures, we draw a conclusion that the male and the female Distycus have the samecracking surface morphology in dorsal and have the same striated surface morphologyin leathery wing. From the biological evolution theory we deduced that thenon-smooth surface morphology of Distycus' dorsal and leathery wing suits for livingin water, or drag reduction effects, or desorption effects etc.,which needs moreresearch. The main purpose of this paper is to prove that the suckers of male Distycus'front feet can adapt to sucking surface absolutely by the description of these surfacemorphologies. And recover the scene lively when it was adsorbing by the method ofpicture superposition, and to describe the adapted effects to female Distycus' dorsal.Villiform organisms on the edge big, mid-big sucking disc in Distycus' front feetsucking disc and the willow leaf shape organisms on the edge of basic disc play anrole of airproof,and the basic sucking disc and every sucking disc within it showitself as nested style, in this way, which can increase the adsorption reliability.The second part is the simulation test of the bionic sucking discs by using thefinite element Analysis software——ANSYS,the test was divided into three:landscape orientation 100 N concentrate stress;vertical 100 N concentrate stress;landscape orientation and vertical 100 N concentrate stress. By doing a comparativeanalysis between the two styles sucking discs, the stress concentrate on the edgearound of a sucking disc under the three kinds of loads. Aging and disrepair on theedge of sucking disc will be the main cause that reduces the working life of a suckingdisc when it works in heavy and repeated condition. In contrast, bionic sucking dischas more equal distribution, the stress concentrated area was diverted to the root fromits edge. Firstly, thickening the edge of sucking disc increasing the touching area,secondly, staving off exception too early because of aging and disrepair. This thesisfluid simulation test。The test consists of two situations: no leakage and local leakage.The results of simulation proved that the bionic multi-sucking discs can keep a goodcondition wither no leakage or not.The third part is tension experiment. Select reasonable number and size ofsucking disc from the experiment results. At last , determine that the results are fourdiscs style and three discs style. The diameter is ?24 mm for four discs style, and thediameter is ?28 mm for three discs style.