Active Vibration Control of Timoshenko Beam Based on Hybrid Wave/Mode Method

Based on Timoshenko beam theory,a hybrid approach combining wave control to independent modal space control is presented to research the vibration control of cantilever beam.Wave control can be applied at one or more points in the structure.Modal control is applied,being designed on the basis of global motion of structure.Then wave control is designed on the basis of the local properties of the structure and is intended to absorb the vibration energy at higher frequencies.Wave reflection and transmission in beams are calculated.Vibrations of Timoshenko beam per unit disturbance are investigated in theory.The particular approach considered is that of collocated,PD feedback wave control combined with modal control designed using pole placement.At last,numerical results are presented.