Engineering Micromechanical Systems for the Next Generation Wireless Capsule Endoscopy

Table 3

Actuator characteristics evaluation matrix.

Characteristics	Micromotor	Piezoelectric	SMA
Voltage	<5 V	>100 V	>2 V
Displacement	Unlimited	0.2%	>30%
Force	High	High	Medium
Speed	<1 kHz	~10 kHz	~0.1 Hz
Compactness	Poor	Good	Good
Motion type	Rotation	Linear	Linear