8 Control Options
8.1 2-Multi
Proportional control with 2 electrodes.
The neutral position of the Michelangelo Hand is the initial position for opposition mode and later
al mode.
The gripping speed and gripping force are determined by the strength of the electrode signal
(resulting from the muscle contraction). The gripping force can be increased up to the maximum
gripping force at any time through a stronger electrode signal.
Starting from an open hand position, the Michelangelo Hand automatically switches to the neutral
position when the hand is not controlled via the electrode signals. While closing to the neutral
position, the system builds up the minimum gripping force (approx. 15 N).
Opening:
Proportionally controlled by the OPENING electrode (e.g. input 2)
Closing:
Proportionally controlled by the CLOSING electrode (e.g. input 1)
Example 1:
The hand is opened by an OPEN signal in opposition mode. After the OPEN muscle has relaxed,
the hand slowly moves to the neutral position.
Example 2:
The hand is in the neutral position. Upon receiving a CLOSE signal, the hand closes in the last
used gripping mode (lateral or opposition).
Example 3:
When a low electrode signal is applied, the system builds up the lowest gripping force in lateral
mode or opposition mode to grip an object.
Example 4:
When there is a higher electrode signal, a greater gripping force is generated; through secondary
gripping with a stronger electrode signal, the gripping force is increased up to the maximum grip
ping force.
OPEN
Sustained electrode signal
Speed: Proportional
8.2 2-ELE
Proportional control with 2 electrodes.
The open position of the Michelangelo Hand is the initial position for lateral mode, opposition
mode and the neutral position. It is only possible to exit the neutral position by fully opening
the Michelangelo Hand.
The gripping speed and gripping force are determined by the strength of the electrode signal
(resulting from the muscle contraction). The gripping force can be increased up to the maximum
gripping force at any time through a stronger electrode signal.
Only when the Michelangelo Hand is in the fully opened hand position does it change to the neut
ral position if the hand is not controlled via the electrode signals. While closing to the neutral pos
ition, the system builds up the minimum gripping force (approx. 15 N).
Opening:
Proportionally controlled by the OPENING electrode (e.g. input 2)
Closing:
Proportionally controlled by the CLOSING electrode (e.g. input 1)
16 | Ottobock
CLOSE
Sustained electrode signal
Gripping force: Proportional
Speed: Proportional