보행 모의 실험을 위한 발목 없는 하지 외골격 로봇의 지면 접촉 모델 최적화
Optimization of Ground Contact Model of Ankleless Lower Exoskeleton Robot for Gait Simulation
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초록
The purpose of this study is to optimize parameters of a contact model to obtain similar ground contact force of human walking. Dynamic walking simulation considering ground contact is performed to determine load specifications when developing walking assist robots. Large contact forces that are not observed in actual experimental data occur during the simulation at the initial contact (e.g., heel contact). The large contact force generates unrealistic large joint torques. A lower exoskeleton robot with no ankles is developed with the Matlab simscape and the nonlinear hyper volumetric contact model is applied. Parameters of the nonlinear hyper volumetric model were optimized using actual walking contact force data. As a result of optimization, it was possible to obtain a contact force pattern similar to actual walking by removing the large contact force generated during initial contact.
Abstract
The purpose of this study is to optimize parameters of a contact model to obtain similar ground contact force of human walking. Dynamic walking simulation considering ground contact is performed to determine load specifications when developing walking assist robots. Large contact forces that are not observed in actual experimental data occur during the simulation at the initial contact (e.g., heel contact). The large contact force generates unrealistic large joint torques. A lower exoskeleton robot with no ankles is developed with the Matlab simscape and the nonlinear hyper volumetric contact model is applied. Parameters of the nonlinear hyper volumetric model were optimized using actual walking contact force data. As a result of optimization, it was possible to obtain a contact force pattern similar to actual walking by removing the large contact force generated during initial contact.
참고문헌 (18)
- I. S. Lee, "Research Trends of Humanoid Robots", Robot and Human, 16(3), pp.3~11 (2019)
- J. H. Jang, "Research Trends of Wearable Robot", Journal of the KSME, 56(2), pp.42~46 (2016)
- H. S. Uh, "Research Trends and Prospects of Wearable Robot", Journal of the ICROS, 25(1), pp.24~33 (2019)
- "Leading Top Five Exoskeleton Robots"[URL]
- "Humanoid Robots are rising up"[URL]
- Eduardo Corral, "Nonlinear phenomena of contact in multibody systems dynamics: a review", Nonlinear Dynamics, 104(2), pp.1269~1295 (2021), Springer Science and Business Media LLC[DOI]
- Paulo Flores, "Contact Force Models for Multibody Dynamics" (2016), Springer Cham
- Heinrich Hertz, "About the Touch of Solid Elastic Bodies", Journal for pure and applied mathematics, 1882(92), pp.156~171 (1882), Walter de Gruyter GmbH[DOI]
- K. H. Griffin, "Impact: The Theory and Physical Behaviour of Colliding Solids.W. Goldsmith. Arnold, London. 1960. 379 pp. Diagrams. 90s.", The Journal of the Royal Aeronautical Society, 65(606), pp.443~443 (1961), Cambridge University Press (CUP)[DOI]
- K. H. Hunt, "Coefficient of Restitution Interpreted as Damping in Vibroimpact", Journal of Applied Mechanics, 42(2), pp.440~445 (1975), ASME International[DOI]
- Marek Wojtyra, "Multibody Simulation Model of Human Walking", Mechanics Based Design of Structures and Machines, 31(3), pp.357~379 (2003), Informa UK Limited[DOI]
- Stephen H. Scott, "Biomechanical model of the human foot: Kinematics and kinetics during the stance phase of walking", Journal of Biomechanics, 26(9), pp.1091~1104 (1993), Elsevier BV[DOI]
- Willem Petersen, "A Nonlinear Volumetric Contact Model for Planetary Rover Wheel", Soil Interaction, 2014, ~
- Mohammad S. Shourijeh, "Foot–ground contact modeling within human gait simulations: from Kelvin–Voigt to hyper-volumetric models", Multibody System Dynamics, 35(4), pp.393~407 (2015), Springer Science and Business Media LLC[DOI]
- Emma Reznick, "Lower-limb kinematics and kinetics during continuously varying human locomotion", Scientific Data, 8(1) (2021), Springer Science and Business Media LLC[DOI]
- "Manual for Implementation and Maintenance of Traffic Signal"[URL]
- "Spherical cap"[URL]
- D. H. Lee, "Kinematics of Normal and Pathologic Gait", Journal of Korean Orthopaedic Research Society, 7(2), pp.169~177 (2004)