Abstract
The momentum exchange impact damper (MEID) has already proposed for reducing the shock vibration of the floor. In the MEID, the shock energy of the floor is suppressed by transferring a part of its kinetic energy to the damper mass during collision time. In this study, an active shock control using the momentum exchange impact damper (AMEID) and its application to reducing shock vibration of the floor is proposed. The floor is modeled as a one-degree-of-freedom system. The actuator is installed between the contact spring and the damper mass. A linear motor is assumed as the actuator. The LQR optimal control is applied to design the controller of AMEID. It is verified that the performance of AMEID is not affected by the mass ratio between the impact damper mass and the floor mass. In addition, the performance of AMEID is compared with the conventional passive momentum exchange impact damper (PMEID) and the conventional active control method in reducing the floor shock vibration. It is shown that the shock reduction performance obtained by AMEID is larger than that obtained by PMEID. Furthermore, the transmitted force obtained by AMEID is smaller than that of the conventional active control.
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