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Drăgoi MV, Hadăr A, Goga N, Baciu F, Ștefan A, Grigore LȘ, Gorgoteanu D, Molder C, Oncioiu I. Contributions to the Dynamic Regime Behavior of a Bionic Leg Prosthesis. Biomimetics (Basel) 2023; 8:414. [PMID: 37754165 PMCID: PMC10526395 DOI: 10.3390/biomimetics8050414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 08/28/2023] [Accepted: 08/30/2023] [Indexed: 09/28/2023] Open
Abstract
The purpose of prosthetic devices is to reproduce the angular-torque profile of a healthy human during locomotion. A lightweight and energy-efficient joint is capable of decreasing the peak actuator power and/or power consumption per gait cycle, while adequately meeting profile-matching constraints. The aim of this study was to highlight the dynamic characteristics of a bionic leg with electric actuators with rotational movement. Three-dimensional (3D)-printing technology was used to create the leg, and servomotors were used for the joints. A stepper motor was used for horizontal movement. For better numerical simulation of the printed model, three mechanical tests were carried out (tension, compression, and bending), based on which the main mechanical characteristics necessary for the numerical simulation were obtained. For the experimental model made, the dynamic stresses could be determined, which highlights the fact that, under the conditions given for the experimental model, the prosthesis resists.
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Affiliation(s)
- Marius-Valentin Drăgoi
- Department of Strength of Materials, Faculty of Industrial Engineering and Robotics, Politehnica University of Bucharest, 060042 București, Romania; (M.-V.D.); (A.H.); (F.B.)
| | - Anton Hadăr
- Department of Strength of Materials, Faculty of Industrial Engineering and Robotics, Politehnica University of Bucharest, 060042 București, Romania; (M.-V.D.); (A.H.); (F.B.)
- Academy of Romanian Scientists, 3 Ilfov Street, Sector 5, 050045 Bucharest, Romania
- Technical Sciences Academy of Romania, 26 Dacia Boulevard, Sector 1, 030167 Bucharest, Romania
| | - Nicolae Goga
- Faculty of Engineering in Foreign Languages, Politehnica University of Bucharest, 060042 București, Romania;
| | - Florin Baciu
- Department of Strength of Materials, Faculty of Industrial Engineering and Robotics, Politehnica University of Bucharest, 060042 București, Romania; (M.-V.D.); (A.H.); (F.B.)
| | - Amado Ștefan
- Department of Integrated Aviation Systems and Mechanics, Faculty of Aircraft and Military Vehicles, “Ferdinand I” Military Technical Academy, 050141 Bucharest, Romania;
| | - Lucian Ștefăniță Grigore
- Center of Excellence in Robotics and Autonomous Systems—CERAS, “Ferdinand I” Military Technical Academy, 050141 Bucharest, Romania; (L.Ș.G.); (D.G.); (C.M.)
| | - Damian Gorgoteanu
- Center of Excellence in Robotics and Autonomous Systems—CERAS, “Ferdinand I” Military Technical Academy, 050141 Bucharest, Romania; (L.Ș.G.); (D.G.); (C.M.)
| | - Cristian Molder
- Center of Excellence in Robotics and Autonomous Systems—CERAS, “Ferdinand I” Military Technical Academy, 050141 Bucharest, Romania; (L.Ș.G.); (D.G.); (C.M.)
| | - Ionica Oncioiu
- Department of Informatics, Faculty of Informatics, Titu Maiorescu University, 040051 Bucharest, Romania
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Doyen É, Szmytka F, Semblat JF. A novel characterisation protocol of mechanical interactions between the ground and a tibial prosthesis for long jump. Sci Rep 2023; 13:5226. [PMID: 36997561 PMCID: PMC10063667 DOI: 10.1038/s41598-023-31981-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Accepted: 03/21/2023] [Indexed: 04/03/2023] Open
Abstract
The mechanical study of Running Specific Prostheses (RSPs) is often limited to the blade. The setup developed and presented herein is a simple experiment, based on a mechanical testing machine and a camera, that assesses two indicators relevant to coaches and athletes in the field of athletics: secant stiffness and energy dissipation. The influence of four parameters on global prosthesis behaviour is evaluated: the load line offset, the prosthesis-ground angle, the sole type and the flooring type. The load line offset and the flooring type have little to no influence on their behaviour. The prosthesis-ground angle impacts the stiffness: an increase in the angle brings a significant decrease in stiffness, which strongly impacts the performance. The type of sole modifies the kinematics of the blade tip's interaction with the ground. However, this effect is less likely to enhance the sports practice since athletics imposes the use of spikes. The camera images allow assessing the local behaviour of the sole, thus enabling to follow its strain through the compression process.
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Affiliation(s)
- Élodie Doyen
- IMSIA, CEA, CNRS, EDF, ENSTA Paris, Institut Polytechnique de Paris, 91120, Palaiseau, France.
| | - Fabien Szmytka
- IMSIA, CEA, CNRS, EDF, ENSTA Paris, Institut Polytechnique de Paris, 91120, Palaiseau, France
| | - Jean-François Semblat
- IMSIA, CEA, CNRS, EDF, ENSTA Paris, Institut Polytechnique de Paris, 91120, Palaiseau, France
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