Emerging worm-like soft robots with various soft materials and different actuation mechanism have been frequently discussed. It is very challenging for soft robots in realizing a fast and untethered crawling. In this article, a biomimetic magnet embedded worm-like robot (shorted as “MagWorm”) in the size of centimeter level is designed and investigated. The actuation of the MagWorm is achieved by housing permanent magnetic patches in its soft body, which interact with an external moving drive-magnet system. A dynamic model is established, coupling the discrete elastic rod model with magnetic actuation. The driving mechanism is then numerically studied. Quantitative comparisons between the numerical solution and experiment results show reasonable agreement. It is shown that the MagWorm can deform part of its body into a “Ω” shape and generate biomimetic crawling locomotion. The crawling speed of the robot is studied experimentally with different sizes. Some potential applications are also proposed and demonstrated. The MagWorm represents compact and low-cost solutions that use permanent magnets for remote actuation of soft robot and can be continuously operated during long procedures.
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References
1.
TrimmerB. A journal of soft robotics: why now?. Soft Robot, 2013; 1:1–4.
2.
KimS, LaschiC, TrimmerB. Soft robotics: a bioinspired evolution in robotics. Trends Biotechnol, 2013; 31:287–294.
3.
NurzamanSG, IidaF, MargheriL, et al.Soft robotics on the move: scientific networks, activities, and future challenges. Soft Robot, 2014; 1:154–158.
4.
DillerE, ZhuangJ, LumGZ, et al.Continuously distributed magnetization profile for millimeter-scale elastomeric undulatory swimming. Appl Phys Lett, 2014; 104:174101.
5.
XuT, ZhangJ, SalehizadehM, et al.Millimeter-scale flexible robots with programmable three-dimensional magnetization and motions. Sci Robot, 2019; 4:eaav4494.
MiriyevA, StackK, LipsonH. Soft material for soft actuators. Nat Commun, 2017; 8:596–603.
9.
WangW, LeeJY, RodrigueH, et al.Locomotion of inchworm-inspired robot made of smart soft composite (SSC). Bioinspir Biomim, 2014; 9:046006.
10.
YukH, KimD, LeeH, et al.Shape memory alloy-based small crawling robots inspired by C. elegans. Bioinspir Biomim, 2011; 6:046002.
11.
MaoS, DongE, XuM, et al.Design and development of starfish-like robot: soft bionic platform with multi-motion using SMA actuators. In: 2013 IEEE International Conference on Robotics and Biomimetics (ROBIO), Shenzhen, China: IEEE. 2013:91–96.
12.
KohJS, ChoKJ. Omega-shaped inchworm-inspired crawling robot with large-index-and-pitch (LIP) SMA spring actuators. IEEE ASME Trans Mechatron, 2012; 18:419–429.
13.
UmedachiT, VikasV, TrimmerB. Softworms: the design and control of non-pneumatic, 3D-printed, deformable robots. Bioinspir Biomim, 2016; 11:025001.
14.
MaulL R, AliciG. A magnetically actuated endoscopic capsule robot based on a rolling locomotion mechanism. In: International Conference on Advanced Intelligent Mechatronics. Wollongong, Australia,, 2013:50–55.
15.
FloydS, PawasheC, SittiM, et al.An untethered magnetically actuated micro-robot capable of motion on arbitrary surfaces. In: International Conference on Robotics and Automation. Pasadena, CA, USA,, 2008:419–424.
16.
YuJ, ZhangC, LiuL, et al.Design and control of a single-motor-actuated robotic fish capable of fast swimming and maneuverability. IEEE ASME Trans Mechatron, 2016; 21:1711–1719.
17.
VogtmannD, PierreRS, BergbreiterS. A 25 mg magnetically actuated microrobot walking at >5 body lengths/sec. In: International Conference on Micro Electro Mechanical Systems, Las Vegas, NV: IEEE. 2017:179–182.
18.
LumGZ, YeZ, DongX, et al.Shape-programmable magnetic soft matter. Proc Natl Acad Sci U S A, 2016; 113:6007–6015.
19.
HuW, LumGZ, MastrangeliM, et al.Small-scale soft-bodied robot with multimodal locomotion. Nature, 2018; 554:81–85.
20.
AbbottJJ, PeyerKE, LagomarsinoMC, et al.How should microrobots swim?. Int J Rob Res, 2009; 28:1434–1447.
21.
SudoS, SegawaS, HondaT. Magnetic swimming mechanism in a viscous liquid. J Intell Mater Syst Struct, 2006; 17:729–736.
22.
PanQ, GuoS. Development of the novel types of biomimetic microrobots driven by external magnetic field. In: IEEE International Conference on Robotics and Biomimetics (ROBIO), Sanya, China: IEEE. 2007:256–261.
23.
LuH, ZhangM, YangY, et al.A bioinspired multilegged soft millirobot that functions in both dry and wet conditions. Nat Commun, 2018; 9:3944.
24.
ZhangTS, KimA, OchoaM, et al. Controllable ‘somersault’ magnetic soft robotics. In: IEEE International Conference on Micro Electro Mechanical Systems (MEMS), Estoril, Portugal: IEEE. 2015:1044–, 1047.
25.
SagaN, NakamuraT. Development of a peristaltic crawling robot using magnetic fluid on the basis of locomotion mechanism of the earthworm. Smart Mater Struct, 2004; 13:566–569.
26.
YimS, SittiM. Design and rolling locomotion of a magnetically actuated soft capsule endoscope. IEEE Trans Rob, 2012; 28:183–194.
27.
YimS, SittiM. Shape-programmable soft capsule robots for semi-implantable drug delivery. IEEE Trans Rob, 2012; 28:1198–1202.
28.
JoyeeEB, PanY. A fully three-dimensional printed inchworm-inspired soft robot with magnetic actuation. Soft Robot, 2019; 6:333–345.
29.
DillerE, GiltinanJ, SittiM. Independent control of multiple magnetic microrobots in three dimensions. Int J Rob Res, 2013; 32:614–631.
30.
ChowdhuryS, JingW, JaronP, et al.Path planning and control for autonomous navigation of single and multiple magnetic mobile microrobots. In: ASME International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, Boston, MA: ASME. 2015:1–10.
31.
CappelleriD, EfthymiouD, GoswamiA, et al.Towards mobile microrobot swarms for additive micromanufacturing. Int J Adv Robot Syst, 2014; 11:1–14.
32.
GhoshA, FischerP. Controlled propulsion of artificial magnetic nanostructured propellers. Nano Lett, 2009; 9:2243–2245.
33.
TottoriS, ZhangL, QiuF, et al.Magnetic helical micromachines: fabrication, controlled swimming, and cargo transport. Adv Mater, 2012; 24:811–816.
34.
HondaT, AraiKI, IshiyamaK. Micro swimming mechanisms propelled by external magnetic fields. IEEE Trans Magn, 2002; 32:5085–5087.
35.
KimY, YukH, ZhaoR, et al.Printing ferromagnetic domains for untethered fast-transforming soft materials. Nature, 2018; 558:274–279.
36.
JeonS, HoshiarAK, KimK, et al.A magnetically controlled soft microrobot steering a guidewire in a three-dimensional phantom vascular network. Soft Robot, 2019; 6:54–68.
JanssenJLG. Extended analytical charge modeling for permanent-magnet based devices: practical application to the interactions in a vibration isolation system. PhD thesis, Eindhoven University of Technology, Eindhoven, 2011.
39.
ErniS, SchurleS, FakhraeeA, et al.Comparison, optimization, and limitations of magnetic manipulation systems. J Micro-Bio Robot, 2013; 8:107–120.
40.
YonnetJP, AllagH. Three-dimensional analytical calculation of permanent magnet interactions by “magnetic node” representation. IEEE Trans Magn, 2011; 47:2050–2055.
41.
LiJ, BarjueiES, CiutiG, et al.Magnetically-driven medical robots: an analytical magnetic model for endoscopic capsules design. J Magn Magn Mater, 2018; 452:278–287.
42.
YangW, TangC, QinF. Investigation of a cuboidal permanent magnet's force exerted on a robotic capsule. Med Dev Evid Res, 2014; 7:283–289.
43.
FountainTWR, KailatPV, AbbottJJ. Wireless control of magnetic helical microrobots using a rotating-permanent-magnet manipulator. In: IEEE International Conference Robotics and Automomation (ICRA), Anchorage, USA: IEEE. 2010:576–581.
44.
Bergou, Miklos, et al. Discrete elastic rods. ACM Trans Graph, 2008; 27:1–12.
45.
HuangW, HuangX, MajidiC, et al.Dynamic simulation of articulated soft robots. Nat Commun, 2020; 11:2233.
46.
GoldbergNN, HuangX, MajidiC, et al.On planar discrete elastic rod models for the locomotion of soft robots. Soft Robot, 2019; 6:595–610.
47.
Garcia-VallejoD, ValverdeJ, DominguezJ. An internal damping model for the absolute nodal coordinate formulation. Nonlinear Dyn, 2005; 42:347–369.
48.
CharpentierJF, LemarquandG. Calculation of ironless permanent magnet couplings using semi-numerical magnetic pole theory method. COMPEL, 2001; 20:72–89.
49.
MengelkampJ, ZiolkowskiM, WeiseK, et al.Permanent magnet modeling for Lorentz force evaluation. IEEE Trans Magn, 2015; 51:1–11.
50.
MarquesF, FloresP, Pimenta Claro JC, et al.A survey and comparison of several friction force models for dynamic analysis of multibody mechanical systems. Nonlinear Dyn, 2016; 86:1407–1443.
51.
MathisA, MamidannaP, CuryKM, et al.DeepLabCut: markerless pose estimation of user-defined body parts with deep learning. Nat Neurosci, 2018; 21:1281–1289.
52.
TuononenAJ. Onset of frictional sliding of rubber-glass contact under dry and lubricated conditions. Sci Rep, 2016; 6:27951.
53.
WenT, ZengX, CirciC, et al.Hop reachable domain on irregularly shaped asteroids. J of Guidance, Control, and Dynamics, 2020; 43:1269–1283.
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