圧電アクチュエータ・センサを用いたCFRP積層板の単一モード振動制御

Abstract

The present paper treats a structural vibration control for a specific lower-order or higher-order single mode using the modal sensor and the modal actuator. In this paper, we examine the validity of modal sensor in the vibration measurement and control of CFRP cantilevered plates. A modal sensor system for identifying the specific vibration mode, which is mechanically simple, is developed by one accelerometer and one band-pass filter so as to be easily equipped to the structures. Here, the location of accelerometer is optimized based on the minimization criterion of observation spillover. Moreover, a modal actuator system to generate a modal control force for controlling the specific vibration mode is also developed by one piezoelectric patch. The location of PZT piezoelectric patch is also optimized and the independent modal space control based on the LQR control theory is applied in this research. The numerical and experimental results show that the proposed vibration control system is effective for suppression of single modal vibration regardless of a lower-order or higher-order modal vibration.