ACTIVE DAMPING OF ADAPTIVE COMPOSITE THIN-WALLED BEAMS CONSIDERING THE PRETWIST ANGLES

摘要

Dynamic response of rotating adaptive composite thin-walled beam with distributed sensors and actuators is studied in this paper. Active damping property of structure is obtained by distributed sensors and actuators which are embedded between composite layers. Variation of active damping performance for the position and the amount of sensor/actuator pair is discussed. Further, performance factors of dynamic characteristics that are the lay-up type, the fiber orientation, setting angle and pretwist angle in host-structure are considered. Finite element method is applied in the numerical study, and negative velocity feedback control algorithm is employed to generate the active damping. The paper continues with an investigation into influences of parameters such as the rotating speed, pretwist angle and the fiber orientation in host structures. Also, it is confirmed that effective damping performance can be obtained through the suitable arrangement and distributed size of sensor and actuator pair using case study.