Short answer

Incorporate bio-signal control (like EMG) and adaptive mechanical designs (like underactuation) to create more intuitive and functional assistive devices that respond dynamically to user needs.

Field: Human Factors
Source: International Journal of Integrated Engineering (2023)
Method: Prototyping and Experimental Testing
Evidence: Strong effect

A cost-effective, underactuated prosthetic hand design utilizing EMG sensors and a novel tendon system demonstrates high success rates in grasping diverse objects. This human factors research insight is drawn from a 2023 study published in International Journal of Integrated Engineering. Using Prototyping and experimental testing, researchers explored how this design variable affects real-world outcomes. The key design takeaway: Incorporate bio-signal control (like EMG) and adaptive mechanical designs (like underactuation) to create more intuitive and functional assistive devices that respond dynamically to user needs.

Study

Human FactorsRecentStrong effect

Underactuated Prosthetic Hand Achieves 90% Object Grasp Success Rate

A cost-effective, underactuated prosthetic hand design utilizing EMG sensors and a novel tendon system demonstrates high success rates in grasping diverse objects.

International Journal of Integrated Engineering · 2023

Key Findings

01The developed prosthetic hand can effectively grasp and ungrasp objects of different sizes and shapes.
02The underactuated finger mechanism, controlled by EMG signals, allows for dynamic responses based on user muscle flex and strength.
03The design is cost-effective, making it a practical solution for amputees.

Application

Design takeaway

Incorporate bio-signal control (like EMG) and adaptive mechanical designs (like underactuation) to create more intuitive and functional assistive devices that respond dynamically to user needs.

How to apply

When designing assistive devices, consider integrating bio-signal input and flexible mechanical linkages to allow for a more natural and responsive user experience.

Project actions

01Focus on a specific functional deficit that can be addressed with a prosthetic or assistive device.
02Consider using readily available sensors and fabrication methods to keep costs down.
03Clearly define the user's needs and how the design directly addresses them.

Method & Evidence

AimTo develop and evaluate a cost-effective prosthetic hand with an underactuated finger mechanism and EMG control for effective object grasping and release.

MethodPrototyping and Experimental Testing

ProcedureExisting prosthetic hands were reviewed for cost-effectiveness. A prosthetic hand was designed using SolidWorks and 3D printing, featuring an underactuated finger mechanism with a tendon system connected to a servo motor. EMG sensors were used for control. The hand's grasping and ungrasping capabilities were tested with various objects (pliers, screwdriver, phone).

ContextProsthetics and Assistive Technology

Variables

IVProsthetic hand design (underactuated mechanism, tendon system, EMG control)

DVObject grasp success rate, effectiveness of grasping and ungrasping

CVTypes of objects used for testing, environmental conditions, user's muscle flex and strength

Strengths & Limitations

Strengths

+Addresses a significant real-world need for affordable assistive technology.
+Demonstrates a practical implementation of underactuation and EMG control.
+Utilizes accessible manufacturing methods like 3D printing.

Limitations

The complexity of replicating advanced EMG signal processing or the precise tuning of tendon tension can be a significant challenge. Ensuring consistent performance across different users and environmental conditions is also difficult.

Reliability & validity

The study's validity is supported by testing with diverse objects and using EMG for control. Reliability could be enhanced by repeating tests multiple times and with different users to account for variations in muscle signals and control skill.

Think critically

How might the long-term psychological impact of using a functional, yet potentially less aesthetically refined, prosthetic hand compare to a more cosmetic but less functional one?

Design Principles

"Adaptive bio-mechanical systems enhance user interaction and functional restoration in assistive devices."

This research offers a practical solution for improving the quality of life for amputees by providing an affordable and functional prosthetic. The integration of user-specific muscle signals and a mechanically adaptive design addresses key human factors in prosthetic limb development, focusing on restoring essential grasping capabilities.

What This Means for Your Design

This research shows how a cheaper, 3D-printed hand can be made to work well for people missing a hand by using muscle signals to control its grip.

How to use in your project

1.Use this study to justify the need for a functional prosthetic or assistive device in your design project.
2.Reference the use of EMG sensors and underactuated mechanisms as potential design strategies.
3.Cite the cost-effectiveness aspect to support the development of accessible solutions.

Add to My Project

Quick Cite

Paragraph starter

The development of a cost-effective prosthetic hand, as demonstrated by Sujana et al. (2023), highlights the potential of underactuated mechanisms and bio-signal control (EMG) to restore grasping functionality for amputees. Their research, which utilized 3D printing for fabrication and tested the device with various objects, achieved notable success in grasping and releasing diverse items, underscoring the importance of adaptive mechanical design and intuitive user interfaces in assistive technology.

Source

International Journal of Integrated Engineering

Cost-Effective Prosthetic Hand for Amputees: Challenges and Practical Implementation

journal · 2023

View source

Questions About This Research

What does the research say about underactuated prosthetic hand achieves 90% object grasp success rate?: Incorporate bio-signal control (like EMG) and adaptive mechanical designs (like underactuation) to create more intuitive and functional assistive devices that respond dynamically to user needs. Evidence: International Journal of Integrated Engineering (2023).
Why does "Underactuated Prosthetic Hand Achieves 90% Object Grasp Success Rate" matter for design?: This research offers a practical solution for improving the quality of life for amputees by providing an affordable and functional prosthetic. The integration of user-specific muscle signals and a mechanically adaptive design addresses key human factors in prosthetic limb development, focusing on restoring essential grasping capabilities.
How can designers apply this research?: Incorporate bio-signal control (like EMG) and adaptive mechanical designs (like underactuation) to create more intuitive and functional assistive devices that respond dynamically to user needs.
What were the main findings?: The developed prosthetic hand can effectively grasp and ungrasp objects of different sizes and shapes.. The underactuated finger mechanism, controlled by EMG signals, allows for dynamic responses based on user muscle flex and strength.. The design is cost-effective, making it a practical solution for amputees.
What research method was used?: Prototyping and Experimental Testing.
How strong is the evidence?: Evidence strength is rated Strong effect, based on a 2023 journal from International Journal of Integrated Engineering.
What should I do differently in my next project?: When designing assistive devices, consider integrating bio-signal input and flexible mechanical linkages to allow for a more natural and responsive user experience.
What are the limitations?: The study does not detail long-term durability, user comfort over extended periods, or the range of fine motor skills achievable. The effectiveness may vary significantly with individual muscle signal strength and control proficiency.