Abstract
Conceiving robots with a variable stiffness continuum structure is a rapidly developing field of research. Swimming snakes provide an excellent bioinspiration source to design such type of robots characterized by variable compliant structures. Appropriate distribution of stiffness should permit to generate desired body shape deformations during swimming and displacements in a cramped space. We modelled the vertebrae anatomy of biological snakes and derived a simplified design. Via the control of the mechanical properties of universal joints, the bioinspired vertebrae compliance effectively mimicked the mechanical properties of biological vertebrae. We describe the method based on orthogonal compliant twist rods we used to build a whole snake robot skeleton. The flexible continuum robot, inspired from swimming snakes, was made of a series of optimized vertebrae. Each one has unique design parameters in order to obtain the stiffness distribution observed in swimming snakes. The resulting structure is a 3D printed monolithic nylon based variable stiffness optimized continuum snake robot. Experimental tests were performed to compare optimized and 3D printed vertebrae deflection angles. We successfully reproduced the variable stiffness observed in biological snakes and obtained the desired motions.
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References
Troncoso, D.A., et al.: A continuum robot for remote applications: from industrial to medical surgery with slender continuum robots. IEEE Robot. Autom. Mag. 2–13 (2022)
Burgner-Kahrs, J., Rucker, D.C., Choset, H.: Continuum robots for medical applications: a survey. IEEE Trans. Robot. 31(6), 1261–1280 (2015)
Crespi, A., Ijspeert, A.J.: AmphiBot II: an amphibious snake robot that crawls and swims using a central pattern generator. In: Proceedings of the 9th International Conference on Climbing and Walking Robots (CLAWAR 2006) (2006)
Liljeback, P., Stavdahl, O., Pettersen, K.Y., Gravdahl, J.T.: Mamba—a waterproof snake robot with tactile sensing. In: 2014 IEEE/RSJ International Conference on Intelligent Robots and Systems, Chicago, IL, USA, pp. 294–301. IEEE (2014)
Thandiackal, R., Melo, K., Paez, L., Herault, J., Kano, T., Akiyama, K., Boyer, F., Ryczko, D., Ishiguro, A., Ijspeert, A.J.: Emergence of robust self-organized undulatory swimming based on local hydrodynamic force sensing. Sci. Robot. 6(57), eabf6354 (2021)
Li, S., Hao, G.: Current trends and prospects in compliant continuum robots: a survey. Actuators 10(7) (2021)
Wang, P., Guo, S., Wang, X., Wu, Y.: Design and analysis of a novel variable stiffness continuum robot with built-in winding-styled ropes. IEEE Robot. Autom. Lett. 7(3), 6375–6382 (2022)
Degani, A., Choset, H., Zubiate, B., Ota, T., Zenati, M.: Highly articulated robotic probe for minimally invasive surgery. Conf. Proc. IEEE Eng. Med. Biol. Soc. 2006(1642343), 4167–4172 (2006)
Gautreau, E., et al.: A biomimetic method to replicate the natural fluid movements of swimming snakes to design aquatic robots. Biomimetics 7(4) (2022)
Marchese, A.D., Onal, C.D., Rus, D.: Autonomous soft robotic fish capable of escape maneuvers using fluidic elastomer actuators. Soft Robot. 1(1), 75–87 (2014)
Gallego, J.A., Herder, J.: Synthesis methods in compliant mechanisms: an overview. Presented at the ASME 2009 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, American Society of Mechanical Engineers Digital Collection, pp. 193–214 (2010)
Gautreau, E., Sandoval, J., Bonnet, X., Arsicault, M., Zeghloul, S., Laribi, M.A.: A new bio-inspired hybrid cable-driven robot (HCDR) to design more realistic snakebots. IEEE Int. J. Robot. Autom. (ICRA) 2134–2140 (2022)
Su, H.-J.: A pseudorigid-body 3R model for determining large deflection of cantilever beams subject to tip loads. J. Mech. Robot. 1(2) (2009)
Yu, Y.-Q., Li, Q., Xu, Q.-P.: Pseudo-rigid-body dynamic modeling and analysis of compliant mechanisms. Proc. Inst. Mech. Eng. Part C J. Mech. Eng. Sci. 232(9), 665–1678 (2018)
Gautreau, E., Bonnet, X., Fox, T. et al.: Complementary methods to acquire the kinematics of swimming snakes: a basis to design bio-inspired robots. J. Bionic Eng. 20, 668–682 (2023)
Acknowledgment
This research was funded by the French government by means of National Research Agency (ANR). This research is part of ANR DRAGON-2 project (ANR-20-CE02-0010).
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Gautreau, E., Bonnet, X., Laribi, M.A. (2023). Optimal Synthesis and Experimental Validation of a Bio-inspired Variable Stiffness Universal Compliant Joint for Continuum Robots. In: Okada, M. (eds) Advances in Mechanism and Machine Science. IFToMM WC 2023. Mechanisms and Machine Science, vol 148. Springer, Cham. https://doi.org/10.1007/978-3-031-45770-8_42
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DOI: https://doi.org/10.1007/978-3-031-45770-8_42
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