Research on the Productization Design of Large-Stroke and High-Precision Non-Resonant Piezoelectric Actuators

Stick-slip actuators have emerged as a promising solution for precision positioning, which can help attain a nanometer-scale resolution and large stroke size. This review summarizes recent advances in the design, modeling, and performance enhancement of non-resonant stick-slip actuators systematically. Three fundamental actuation principles, including conventional, parasitic, and hybrid types, are reported, which highlight their respective mechanisms for stepwise motion generation. We examine the development of linear and rotational actuators and reveal the function of compliant amplification mechanisms, asymmetric stiffness configurations, and bio-inspired architectures in improving step consistency, load capacity, and compactness. We also examine the effects of step displacement optimization, active preload control, and advanced dynamic modeling on motion precision. We suggest that future development prioritize enhancing driving force, suppressing backward motion, improving dynamic response, and ensuring long-term reliability.