About this Research Topic
Piezoelectric actuators are widely utilized in micro/nano-positioning systems for precision machining, optical lens adjustment, biomedical imaging, etc. due to the significant advantages of high resolution, rapid response and compact size compared with traditional actuators (electrical, hydraulic and pneumatic motors). Due to the inverse piezoelectric effect, piezoelectric actuators can obtain micro/nano scale resolution easily. Based on the principles of motion, piezoelectric actuators can be categorized into ultrasonic types, inchworm types, friction-inertial types and so on. In recent years, novel piezoelectric actuators and control methods have been developed to improve their working performance. However, more work on the structural design, motion control, numerical simulation, etc. is still needed to improve the functioning of piezoelectric actuators.
Even though piezoelectric actuators have great advantages in obtaining high-resolution motion, there are still some limitations in the application of piezoelectric actuators. First, the motion stroke of piezoelectric elements is usually limited to several or tens of micrometers, which is much smaller when compared with traditional actuators. Therefore, novel stepping motion principles and flexure mechanisms are desired to enlarge the working stroke. Second, the wear and friction of actuators are still significant weak points for their real-world application. Improved friction materials or driving methods may be helpful to modify these phenomena. Additionally, novel control strategies for high resolution and high speed are also desired to improve the working performance of piezoelectric actuators.
The current Research Topic covers both experimental and simulated studies on novel piezoelectric actuator design, and mechanisms of various flexure hinges, including:
• Novel design and study of piezoelectric actuators and/or flexure hinge mechanism
• Experimental and/or numerical, simulation studies of piezoelectric actuator motion process, including the static and/or dynamic characteristics
• Novel control strategies for piezoelectric actuators
• Various applications of piezoelectric actuators in manufacturing, optical science, and biomedical science, etc.
Keywords: Piezoelectric, Actuator, Flexure Hinge, Motor, Positioning System
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