A lightweight piezo-composite actuator (LIPCA) is used to suppress the vibration of an aluminum beam. Composed of a piezoelectric layer, a carbon-epoxy layer, and glass-epoxy layers, the LIPCA has better performance and durability than bare piezoelectric ceramics (PZT). This study estimates the actuation performances of a LIPCA in an active vibration control as well as a static actuation test. Experiments are performed on an aluminum beam in a cantilever configuration. The LIPCA, a bare PZT, and a 3GE þ PZT actuator are attached to the aluminum beam with adhesive in order to investigate their performance. A comparison of the equivalent actuation moment and the tip deflection of the beam between the LIPCA, the bare PZT, and the 3GE þ PZT actuator shows that the LIPCA has a better actuation performance than the bare PZT and the 3GE þ PZT actuator. In addition, a digital PID control algorithm is applied to the active vibration control system to show how the LIPCA performs as an actuator in an active vibration suppression system. The results show that the LIPCA can effectively suppress free vibration of the aluminum beam, compared to the bare PZT and the 3GE þ PZT actuator. The experiment confirms that the LIPCA can be used as an actuator to suppress vibration of dynamic structures.
This paper presents the application of Lightweight Piezo-composite Curved Actuator (LIPCA) to suppress vibration as actuator. LIPCA is composed of a piezoelectric layer, a carbon/epoxy layer and glass/epoxy layers. When compared to the bare piezoelectric ceramic (PZT), LIPCA has advantages such as high performance, durability and reliability. In this study, performances of LIPCA are estimated in an active vibration control system. Experiments are performed on an aluminum beam by cantilever configuration. In this test, strain gages and single LIPCA are attached on the aluminum beam with epoxy resin in order to investigate their performance. Comparison of actuation force between LIPCA and bare PZT showed that performance of LIPCA was better than that of bare PZT. In addition, digital on-off control algorithm is applied into the system to exhibit performance of LIPCA as actuator in active vibration control system. The results showed LIPCA could suppress free vibration of the aluminum beam. It is possible to apply LIPCA as actuator to control vibration of dynamic structures.
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