Analysis on Mechanical Property of Piezoelectric Linear Actuator in Preloaded State

作者：Wang Binsheng^*; An Weiguang

来源：3rd World Congress in Applied Computing, Computer Science, and Computer Engineering (ACC 2011), China,Sichuan,Aba Zang and Qiang Autonomous Prefecture,Aba, 2011-07-16 to 2011-07-17.

• Intelligent structure
• piezoelectric actuator
• preload
• electro-mechanical coupling
• electrical breakdown

With strong and increasing demand in vibration and shape control, intelligent structures provoke a considerable interest in the field of aerospace, especially. Intelligent structures are structural systems which include active materials, such as piezoelectrics, electrostrictives, magnetostrictives, or shape memory alloys etc. Because piezoelectric materials offer many advantages compared to other active materials, piezoelectric materials are increasingly used in various intelligent structures. As a storage dielectric and a brittle material for the applications, piezoelectric materials are often embedded in a metal casing and pressed by preload spring to absorb tensile forces, which makes it difficult to the analyze the mechanical property of piezoelectric actuator. In the paper, the electro-mechanical coupling equations of spring-preloaded piezoelectric actuator were presented, and the maximize displacement/force outputs were analyzed in theory. A numerical example was given to show the feasible range of stiffness ratio of the piezoelectric stack to the spring.

• 出版日期2011
• 单位哈尔滨工程大学