Abstract

The evaluation of robotic hands is a subjectively biased, complex process. The fields pertaining to robotic hands are human-centric in nature, making human hands a good standard for benchmark comparisons of robotic hands. To achieve this, we propose a new evaluation index, where we evaluate robotic hands on three fronts: their form, features and performance. An evaluation on how anthropomorphic robotic hands are in basic mobility, and appearance constitutes the “Form”, while features that can be read, changed and actuated for effective control of robotic hands constitutes the “Features”. We derived these key features from an extensive analysis of robotic hands in literature. Finally, the robotic hands carry out a series of tasks that evaluate their “Performance”. An individual score for each category is drawn and we carry out a three-pronged analysis. We also propose an additional feature in the form of price to provide context when analysing multiple hands.

Highlights

  • The analysis of end effectors or robotic hands has been a problem as old as robotic hands themselves

  • We developed the FFP index to provide a more objective platform for evaluating robotic hands

  • The quantitative evaluations allowed for comparing key characteristics of given robotic hands with respect to the state of the art, suggesting the rationale used to resolve design trade-offs

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Summary

Introduction

The analysis of end effectors or robotic hands has been a problem as old as robotic hands themselves. The tests have often been tailored to facilitate and highlight the end user experience. This has led to the lack of a balanced vision when it comes to the design and evaluation of robotic hands. There exist numerous methods that evaluate various aspects of robotic hands. One such famous method is in the benchmarking of anthropomorphism and dexterity in robotic hands proposed by Biagiotti et al [3] in 2004, where they provide separate evaluation indices for both anthropomorphism and dexterity. There exists a number of practical assessment tests for human hands such as the The Southampton Hand Assessment Procedure (SHAP) evaluation [4]

Anthropomorphism Index
Dexterity Index
Kapandji Test
Summary on Benchmarks
Survey of the State of the Art
Research
Commercial
Prosthetic
FFP Evaluation Index
Proposal
Identifying the Key Parameters
Number of Actuators to Number of Joints
Hand Weight to the Payload
Hand Weight to the Number of Actuators
Number of Sensor Inputs to Number of Actuators
Key Features
Opposable Thumb
Kinematics
Fingers
Padding
Palm Properties
Width of Opening
Weight
Features
Actuation
Sensors
Performance
Performance Benchmarking in Literature
Prehensile
Non-Prehensile
In-Hand Manipulation
Tool Use
Weight to Payload
Price Addendum
FFP Evaluation of the iCub Hand
Other Evaluated Robotic Hands
Conclusions and Future Work
Findings
Future Work

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