Dynamic Characterization and Control of Piezo-Layered Microstructures

• Main Authors: Ming-Jyh Lee, 李明志
• Other Authors: H.Y. LAI
• Format: Others
• Language: zh-TW
• Online Access: http://ndltd.ncl.edu.tw/handle/75695803833929442687

碩士 === 國立成功大學 === 機械工程學系 === 87 === Since mechanical products miniaturize in recent years, vibrations induced by their operations or impacts from the environment always bring them a lot of damage. The smaller the structure size is, the faster the vibration frequency of the structure is, and the importance of the vibration control increases. With the miniaturization of the structure size, the behavior of vibration becomes nonlinear，and the vibration control becomes more difficult. To invest the vibration of microstructures and real-time control can simplify the vibration control and avoids they to get into nonlinear vibration situation. Because piezoelectric materials have the abilities of mechanical and electrical energy exchangeability, higher energy density, shorter reaction time, lower sensitivity to the environment, and the piezoelectric effects would be more efficient after structures miniaturize, they are suitable to be the materials of sensors and actuators of microstructures. We use PZT as the material of actuators and PVDF as the material of sensors for vibration control of microstructures in this paper. This paper presents the design and analysis of the vibration control for a piezo-layered microstructures. Using the scaling analysis method to decide the size of the microstructure. When moving foundation acts on the microstructure the voltage measured from the piezoelectric sensor by F.E.M. will be amplify by a amplifilter,and then feedback to the piezoelectric actuators to restrict the vibrations in a short time.