Functional evaluation of a real-time EMG controlled prosthetic hand

Wearable Technologies, Journal Year: 2025, Volume and Issue: 6

Published: Jan. 1, 2025

Abstract Electromyogram (EMG)-controlled prosthetic hands have advanced significantly during the past two decades. However, most of currently available fail to replicate human hand functionality and controllability. To measure emulation by a hand, it is important evaluate functional characteristics. Moreover, incorporating feedback from end users clinical testing crucial for precise assessment hand. The work reported in this manuscript unfolds characteristics an EMG-CoNtrolled PRosthetIC Hand called ENRICH. ENRICH real-time EMG controlled that can grasp objects 250.8 $ \pm 1.1 ms, fulfilling neuromuscular constraint evaluated comparison 26 laboratory prototypes 10 commercial variants hands. was terms size, weight, operation time, weight lifting capacity, finger joint range motion, control strategy, degrees freedom, force, testing. box block test pick place showed ENRICH’s evaluation reveals has potential restore amputees, improving their quality life.

Language: Английский

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Wearable Assistive Rehabilitation Robotic Devices—A Comprehensive Review

Machines, Journal Year: 2024, Volume and Issue: 12(6), P. 415 - 415

Published: June 17, 2024

This article details the existing wearable assistive devices that could mimic a human’s active range of motion and aid individuals in recovering from stroke. The survey has identified several risk factors associated with musculoskeletal pain, including physical such as engaging high-intensity exercises, experiencing trauma, aging, dizziness, accidents, damage regular wear tear daily activities. These impact vital body parts cervical spine, spinal cord, ankle, elbow, others, leading to dysfunction, decrease motion, diminished coordination ability, also influencing ability perform activities living (ADL), speaking, breathing other neurological responses. An individual these disorders requires therapies regain restore natural movement. require an experienced physician treat patient, which makes process expensive unreliable because might not repeat same procedure accurately due fatigue. reasons motivated researchers develop control robotics-based for various disorders, economical accessible solutions aid, mimic, reinstate motion. Recently, advancements sensor technologies have been explored healthcare by integrating machine-learning (ML) artificial intelligence (AI) techniques analyze data predict required setting user. review provides comprehensive discussion on importance personalized pre- post-clinical settings aids recovery process.

Language: Английский

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A critical review of transitioning from conventional actuators to artificial muscles in upper-limb rehabilitation devices

Journal of Intelligent Material Systems and Structures, Journal Year: 2024, Volume and Issue: 35(16), P. 1263 - 1290

Published: July 30, 2024

Brain injuries resulting from spinal cord injuries, strokes, or cerebral palsy are among the traumas most capable of compromising motor activities human limbs, hence necessity for development exoskeletons dedicated to rehabilitation these organs. This review examines landscape actuators essential design cutting-edge upper-limb exoskeletal structures. Beyond merely surveying current types available, paper aims provide guidelines selecting that fit optimally with objectives rehabilitation. The description starts a brief discussion on biomechanics upper focusing kinematics pivotal joints (wrist, elbow, shoulder). Subsequently, existing systematically reviewed, offering detailed insights into their primary features, operational principles, strengths, weaknesses, and noteworthy applications within realm robotics. After about actuators, advances by furnishing valuable actuators’ selection tailored limb These discuss crucial factors, such as forces required natural Range Of Motions (ROMs) joints. Finally, manuscript serves resource researchers, engineers, practitioners involved in innovative devices.

Language: Английский

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Study of the Load-Response Effect of NiTi-Based Thermal Actuators. Application to a Robotic Gripper

Mechanisms and machine science, Journal Year: 2024, Volume and Issue: unknown, P. 237 - 251

Published: Jan. 1, 2024

Language: Английский

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Data-Driven Position and Stiffness Control of Antagonistic Variable Stiffness Actuator Using Nonlinear Hammerstein Models

Journal of Sensor and Actuator Networks, Journal Year: 2024, Volume and Issue: 13(2), P. 29 - 29

Published: April 19, 2024

In this paper, an optimal PID controller is introduced for antagonistic variable stiffness actuator (AVSA) based on Hammerstein models. A set of models developed the AVSA using voltage difference method. For each level, linear and nonlinear are identified least squares Experimental results confirm that outputs fit measured data better than models, as can incorporate effects such friction. genetic algorithm utilized to find gains different levels reference position amplitudes. The final obtained by linearly interpolating obtained. To demonstrate effectiveness proposed design, several scenarios with positions profiles provided. Specifically, square, sinusoidal, sawtooth waves used values. robustness approach further analyzed applying a disturbance force link. compared method, showing design handle soft transitions in variation ensure perfect tracking.

Language: Английский

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Designing a Robotic Gripper Based on the Actuating Capacity of NiTi-Based Shape Memory Wires

Actuators, Journal Year: 2024, Volume and Issue: 13(8), P. 319 - 319

Published: Aug. 21, 2024

In the present study, capacity of two commercial NiTi and NiTiCu shape memory alloy (SMA) wires to develop work-generating (WG) constrained-recovery (CR) effects (SMEs), as well a NiTiFe super-elastic wire act cold-shape restoring element, have been investigated. Using differential scanning calorimetry (DSC), reversible martensitic transformation austenite three NiTi-based under study was emphasized by means an endothermic minimum heat flow variation with temperature. fragments were further tested for both WG-SME CR-SME developed during heating, from room temperature (RT) different maximum temperatures selected DSC thermograms. The former tests revealed repetitively lift various loads repetitive while latter disclosed development shrinkage stresses heating elongated wires. tensile behavior SMA analyzed failure loading–unloading tests. actuation wires, which able work being heated, resetting can restore initial undeformed soften cooled down. These features enable design robotic gripper based on actuators action.

Language: Английский

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A Perspective on Prosthetic Hands Control: From the Brain to the Hand

Prosthesis, Journal Year: 2023, Volume and Issue: 5(4), P. 1184 - 1205

Published: Nov. 16, 2023

The human hand is a complex and versatile organ that enables humans to interact with the environment, communicate, create, use tools. control of by brain crucial aspect cognition behaviour, but also challenging problem for both neuroscience engineering. aim this study review current state art in grasp from neuroscientific perspective, focusing on mechanisms underlie sensory integration engineering implications developing artificial hands can mimic interface brain. controls processing integrating information vision, proprioception, touch, using different neural pathways. user’s intention be obtained interfaces, such as electromyography, electroneurography, electroencephalography. This other exploited learning help user adapt changes inputs or outputs, reinforcement learning, motor adaptation, internal models. work summarizes main findings challenges each research highlights gaps limitations approaches. In last part, some open questions future directions are suggested emphasizing need approach bridge gap between hand.

Language: Английский

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Laser deposition of titanium layer to enhance two-way shape memory behavior of Nitinol sheet

Journal of Materials Research and Technology, Journal Year: 2024, Volume and Issue: 29, P. 4748 - 4760

Published: Feb. 27, 2024

One of the long-standing mechanical challenges associated with shape memory alloys (SMAs) is achieving and stabilizing an evolving two-way effect (TWSME) through thermomechanical training/cycling. In most martensitic NiTi SMAs that exhibit zero TWSME at room temperature, TWSMEs typically require hundreds cycling repetitions to track trivial values. This demonstrates a promising solution overcome this challenge. The surface SMA sheets was treated by depositing certain number titanium (Ti) powder layers on using laser beam. results showed unique approximately 12% good stability achieved after 100 cycles when optimum five Ti deposited, which much higher than sheet (0.3% TWSME) sample single-time path irradiation (1.8%). attributed low coefficient thermal expansion vs. sheet, prevented reverse bending during heating, formation Ti-rich intergranular Ti2Ni(Ox) precipitates, hindered dislocation movement. Meanwhile, in sample, owing generation large residual tensile stress heat-affected zone led reduction plastic zones, one-way (OWSME) retained values above 90% over cycling. However, introduction additional can cause problems terms oxygen accumulation within should be considered designing product.

Language: Английский

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Integration of a Shape Memory Alloy with a Soft Pneumatic Actuator to Improve the Haptic Interaction Performance of a Soft Social Robot

Published: May 2, 2024

This paper discusses the integration of a soft pneumatic actuator (SPA) with shape memory alloy (SMA) to improve haptic technologies in social robotics. The use traditional rigid actuators robots can lead unnatural interactions, while SPAs offer flexibility but may lack precision. SMAs are known for their effect and precision, they also have limitations, such as time-consuming heating-cooling cycles. Our research proposes hybrid that combines adaptability precision enhance interaction robots. is designed overcome individual limitations achieve synergistic effect. As first attempt, intended Reliebo, an inflatable robot, provide more natural responsive interactions. approach has potential emotional aspects human-computer

Language: Английский

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Morphing Spoiler for Adaptive Aerodynamics by Shape Memory Alloys

Actuators, Journal Year: 2024, Volume and Issue: 13(9), P. 330 - 330

Published: Sept. 1, 2024

The automotive industry is continuously looking for innovative solutions to improve vehicle aerodynamics and efficiency. research introduces a significant breakthrough in the field of by employing shape memory alloys as bistable actuators spoilers moving flaps. main novelty this lies development actuator made precise accurate control mechanism movable alloys, with their unique ability maintain two stable configurations switch rapidly from one other response thermal or mechanical stimuli, allow rapid adjustment aerodynamic surfaces. advantage technology its optimising both drag downforce, thereby improving performance fuel This shows promising potential single composition NiTi revolutionary industry, revolutionising way flaps are used achieve superior performance.

Language: Английский

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