An application of tuned mass damper (TMD) in the semi-active vibration control of rotor system was proposed

which also had been studied. And a kind of semi-active cage-type tuned mass damper was designed without changing original supports of the rotor system. The section switch control technique based on the rotor speed was put forward.Based on laborary virtual instrument engineering workbench (LabVIEW)

a closed loop system for the natural frequency regulation was developed for semi-active vibration reduction in which cage-type TMD was adjustable according to different rotor speeds. The single span rotor TMD test rig was built and the experimental study has been carried out. Experimental results show that rotor vibration is well controlled with the section switch control technique of the semi-active cage-type TMD when the rotor goes through the critical speed

the vibration damping effect reaching up to 83.4%

which helping to avoid the extra resonance peak caused by TMD.