Vibration Control Using Hybrid Semi-Active/Passive Techniques

In this paper a new hybrid vibration damping technique as a combination of semi-active pulse switching technique and passive constrained layer damping (PCLD) is proposed as an effective vibration control method for all frequency ranges. Semi-active pulse switching technique is an effective method to damp any type of vibrations with no need to external energy sources. But its performance in high-frequency ranges decreases. Also, passive techniques are not so effective in low-frequency ranges, but have significant effects in high-frequency ranges. The proposed hybrid damping technique as a combination of these two control methods is a new effective control technique for all frequency ranges. It covers the weakness of semi-active method and provides significant damping in both low and high frequency vibrations.

Keywords:

hybrid vibration control , pulse switching , viscoelastic , Semi-active damping technique