earticle

영어

This paper investigates mismatch problem in the coupled response of the flexural and longitudinal motions between the piezoelectric actuator and half-length sensor on a beam. This problem is important to design a piezo sensor – actuator pair control system in terms of frequency response function. Piezoelectric transducers have been widely used in control of structures in both aspects: an actuator and a sensor. In this study a half-length piezosensor compared to the piezoactuator is considered and it is assumed bonded on the other side of the actuator. The frequency response functions (FRF) are investigated in theory and computer simulation when the mismatch ratios are 0 %, 15 %, 30 % and 50 % respectively between the sensor and the actuator. Ther simulation results show each FRF is quite similar except some frequency ranges. Also the flexural motion gives a big effect to the coupled motion of the sensor-actuator response. This paper could provide a better understanding on the interaction between piezosensor and piezoactuator which are bonded with some mismatch.