Various types of piezoelectric actuators exist
Actuators may consist of
Piezoelectric actuators are characterized by
The stroke of piezoelectric actuators is limited by the maximum electric field that may be applied. The maximum stroke of a stack actuator typically is approximately 0.1% of its length.
The stroke of piezoelectric actuators can be increased by means of mechanical amplification. An increase of stroke is inherently accompanied by a reduction of force, stiffness, and bandwidth.
A piezoelectric bender may be regarded as an actuator with built-in amplification. The maximum stroke of a bender may be more than 1% of its length.
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