Abstract
Many types of semiactive dampers that can have a variable damping force in order to control and reduce vibration efficiently. Most of semiactive damper have a dynamic function of switching viscosity or stiffness. In this study, a unique active damper that utilizes electromagnetic induction is developed. The active damper consists of a cylinder, piston, a by-pass pipe, electrodes, electromagnets and fluid. A resisting force is derived by the Fleming interaction across a magnetic flux and some electrodes in the by-pass pipe area. It is pointed out that the eight electromagnets are installed at around the by-pass pipe and enable to switch a value and direction of magnetic flux density. In this study, salt water instead of a functional fluid such as MR fluid. The test device of the by-pass pipe was partially manufactured in order to confirm the theory of electromagnetic induction, and to obtain adequate resisting force. Finally, the feasibility study of the damper is confirmed experimentally.
