To reduce the total electric power required for operation and execute long operation by storage battery, by supplying electric power to an electric motor through the storage battery, and recovering energy produced by the electric motor, in association with damping, to the storage battery.
In this damping device 10, additional mass 1 is driven by an electric motor 2, and guided by a linear guide 3 fixed to a building so as to be vibrated horizontally. The vibration of the building is detected by a vibration sensor 4. Further, a supporting spring 5 is attached in parallel to the electric motor 2 to the applied mass 1. A controller 6 inputs the detected output of the vibration sensor 4, transmits a control command signal 8 to an electric motor amplifier 7, then makes the electric motor 2 to produce the motion of the additional mass 1 having phase that suppresses the natural frequency of the building. While, an energy recovering device 30 receives energy 11 developed by reverse action that the electric motor 2 receives from the additional mass 1 during a speed reducing period, and converts energy 11 into a form that storage battery 20 can receive, and sends the energy 11 to the storage battery 20.
NAKABAYASHI SHIRO
NISHI YOSHIKAZU
KONO YUKINOBU
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