Читать книгу Vibrations of Linear Piezostructures - Andrew J. Kurdila - Страница 19

Piezoelectric actuators or motors are available commercially at companies such as PCB® or PI Ceramics®, and they have been the topic of research in academia and national laboratories for decades. The most popular commercially available actuators are the linear or stack actuators and the bender actuators. Stack actuators developed by PI Ceramic® are depicted in Figure 1.8. Commercially available stack actuators usually have a small stroke, on the order O(10) to O(100) m. These prototypical piezoelectric composites are studied in Chapters 5, 6, 7, and 8. Figure 1.9 depicts bender actuators available from PI Ceramics®. The bending actuators are intended for applications that require a larger stroke and operate at a lower frequency than the linear actuators. The stroke of the benders depicted in Figure 1.9 varies approximately from O(100) to O(1000) m. Composite bending actuators are studied in Chapters 5, 6, 7, and 8.

Figure 1.7 Piezoelectrically based microphones from PCB®,

Source: HOW TO SELECT THE BEST TEST & MEASUREMENT PRECISION MICROPHONE, PCB Piezotronics, Inc. Retrieved from: http://www.pcb.com/Microphones Preamplifiers Acoustic Accessories/select.

Figure 1.8 Piezoelectric stack actuators available from PI ceramic®, Source: GmbH & Co. KG owner.

Figure 1.9 Piezoelectric bender actuators available from PI ceramic®, Source: GmbH & Co. KG owner.