Vibration Suppression of Flexible Beams using a Piezoelectric Inertia Actuator

• Main Authors: Li-Han Lin, 林立瀚
• Other Authors: Yih-Hwang Lin
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/63544157158016617317

碩士 === 國立臺灣海洋大學 === 機械與機電工程學系 === 94 === A considerable amount of research work has been done on the application of piezoelectric materials. The number of research papers increases rapidly in the recent years on the use of piezoelectric actuators for structural vibration control. This study applies piezoelectric actuators to control the vibration of a cantilever beam by using active control techniques. The finite element method is applied to obtain the motion equations of a cantilever beam and the attached piezoelectric actuator. The independent modal space control (IMSC) is utilized to control a system with real modes. A single mode control is considered as the baseline analysis case. The mode switching control is consequently applied to control one of the first two modes of the beam system. A combined control force which controls the first two modes simultaneously is further examined. The analysis results show that the mode switching control performs better in the present system. Therefore, it is considered in the further study of the beam system possessing complex modes with the base support damping being taken into account. This study shows that the control spillover is quite serious for systems with close modes when a single mode control is applied, whereas the mode switching control can effectively suppress excessive vibration of the beam system. Keyword: piezoelectric inertia actuators, independent modal space control, active vibration control