A novel rolling driving principle-enabled linear actuator for bidirectional smooth motion
Piezoelectric actuators are widely used in precision positioning, micro/nano fabrication, and microrobotics due to their high precision, fast response, and compactness, yet their inherently limited stroke (typically ~1/1000 of their length) constrains broader applications. To extend travel, stepping actuation approaches—such as inchworm, ultrasonic, and stick-slip mechanisms—have been explored, with stick-slip attractive for its relatively simple structure and control. However, many stick-slip designs still struggle with bidirectional motion consistency and motion smoothness/linearity: particularly, parasitic-motion-based ...
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