The Design and Testing of a PEA Powered Ankle Prosthesis Driven by EHA

Huang, Qitao; Li, Bowen; Xu, Haijue

doi:10.3390/biomimetics7040234

“…Current research addresses the need for more energy during push-offs to propel the body forward and is directed toward ankle prostheses, in which active components achieve this [10][11][12]. However, the downside to these models is the degree of increase in ankle size and weight is generally determined by the amount of power the actuator provides to propel the body forward.…”

Section: Introductionmentioning

confidence: 99%

Dynamic control simulation of a new lower limb prosthesis model with energy recovery during walking, using magnetorheological fluids

Cojocaru,

Vladu,

Pană

et al. 2024

Preprint

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Researchers can now utilize new materials to create innovative models for lower limb prostheses and explore novel ways to use them for efficient dynamic control. To achieve user-friendliness, one area of research focuses on recovering and reusing kinetic walking energy for dynamic control. This paper proposes a new design for a magnetorheological (MR) valve, along with a rotary actuator which offers a dynamic control for a lower limb prosthesis. The design will allow the storage of the energy during heel and mid-foot contact phases and to utilize it during toe support to lift the foot off the ground and establish a balance for the lower limb prosthesis. The energy is transferred through a magnetorheological hydraulic circuit and stored using a pneumatic system. The speed of energy transfer is regulated by magnetorheological valves. A series of MR valve designs were proposed and evaluated experimentally, which allowed the identification of the most suitable variant in the targeted application context. The design of the lower limb prosthesis was simulated using SolidWorks, and its dynamic behaviour was analysed in ANSYS.

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“…Active prosthetic systems [ 18 , 19 ] are kinematically and dynamically superior to passive systems [ 20 , 21 , 22 ]. However, they are taxing in terms of the electrical energy storage capacity [ 23 , 24 ], which affects the operating autonomy [ 25 ].…”

Section: Introductionmentioning

confidence: 99%

Contributions to the Dynamic Regime Behavior of a Bionic Leg Prosthesis

Drăgoi,

Hadăr,

Goga

et al. 2023

Biomimetics

1

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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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Dynamic control simulation of a new joint model with energy recovery during walking, using magnetorheological fluids, for lower limb prosthesis

Vladu,

Pană,

Copilusi

et al. 2024

J Braz. Soc. Mech. Sci. Eng.

0

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Researchers can now utilize new materials to create innovative models for lower limb prostheses and explore novel ways to use them for efficient dynamic control. To achieve user-friendliness, one area of research focuses on recovering and reusing kinetic walking energy for dynamic control. This paper proposes a new design for a magnetorheological (MR) valve, along with a rotary actuator which offers a dynamic control for a lower limb prosthesis. The design will allow the storage of the energy during heel and mid-foot contact phases and to utilize it during toe support to lift the foot off the ground and establish a balance for the lower limb prosthesis. The energy is transferred through a magnetorheological hydraulic circuit and stored using a pneumatic system. The speed of energy transfer is regulated by magnetorheological valves. A series of MR valve designs were proposed and evaluated experimentally, which allowed the identification of the most suitable variant in the targeted application context. The design of the lower limb prosthesis was simulated using SolidWorks, and its dynamic behavior was analyzed in ANSYS.

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The Design and Testing of a PEA Powered Ankle Prosthesis Driven by EHA

Cited by 5 publications

References 22 publications

Dynamic control simulation of a new lower limb prosthesis model with energy recovery during walking, using magnetorheological fluids

Dynamic control simulation of a new lower limb prosthesis model with energy recovery during walking, using magnetorheological fluids

Contributions to the Dynamic Regime Behavior of a Bionic Leg Prosthesis

Dynamic control simulation of a new joint model with energy recovery during walking, using magnetorheological fluids, for lower limb prosthesis

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