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Table 1 Grasped objects, used to constitute the CyberHand postures data-set

From: Principal components analysis based control of a multi-dof underactuated prosthetic hand

Object

Shape

Size [mm]

Grasp Type

Paper roll

Cylindrical

Diam = 80; height = 100

Power grasp

Plastic cup

Cylindrical

Diam = 65; height = 90

Power grasp

Small plastic cylinder

Cylindrical

Diam = 36; height = 125

Power grasp

Medium plastic cylinder

Cylindrical

Diam = 41; height = 120

Power grasp

Big plastic cylinder

Cylindrical

Diam = 71; height = 120

Power grasp

Sponge

Cylindrical

Diam = 100; height = 36

Power grasp

Glue bottle

Cylindrical

Diam = 45; height = 130

Power grasp

Spray

Cylindrical

Diam = 50; height = 135

Power grasp

Twine roll 1

Cylindrical

Diam = 106; height = 21

Power grasp

Twine roll 2

Cylindrical

Diam = 40; height = 75

Power grasp

Tennis ball

Spherical

Diam = 65

Power & precision grasp

Plastic sphere 1

Spherical

Diam = 40

Precision grasp

Plastic sphere 2

Spherical

Diam = 49

Precision grasp

Plastic sphere 3

Spherical

Diam = 59

Precision grasp

Fabric ball

Spherical

Diam = 70

Precision grasp

2 liters bottle

Cylindrical

Diam = 90

Power grasp

500 ml bottle

Cylindrical

Diam = 65

Power grasp

Boxes seal tape

Empty cylinder

Diam = 90; height = 50

Power & precision grasp

Felt tip pen

Cylindrical

Diam = 16; height = 130

Precision grasp

Plastic cube

Cube

L = 50

Precision grasp

CD

Circular

Diam = 120

Precision grasp

Electric adapter plug

Cylindrical

Diam = 41

Precision grasp

CDs pack

Cylindrical

Diam = 125; height = 70

Power grasp

Styrofoam sphere

Spherical

Diam = 90

Power & precision grasp

Cigarette pack

Parallelepiped

20 × 55 × 85

Power & lateral grasp

Card box 1

Parallelepiped

103 × 58 × 45

Power grasp

Card box 2

Parallelepiped

103 × 45 × 40

Power grasp

Paperclips pack

Parallelepiped

55 × 39 × 11

Lateral grasp

Business card

Rectangular

Height = 1

Lateral grasp (× 10)

  1. Objects used to collect the data-set from the CyberHand for calculating the PCs matrix. Lateral grasps have been repeated 10 times (in order to obtain the correct percentages values for power, precision and lateral grasps based on [48]), and some objects have been grasped using different hand configurations (i.e. grasping the seal tape with the fingertips rather than leaning it against the hand palm, or holding the sphere with the hand fingertips rather than performing a spherical grasp). The open-hand position has been included into the data-set (4 times).