Abstract
With a view to applying the active wave control method for suppression of all vibration modes of a large scale-structure, a new type of moment-driven actuator using a piezo-electric ceramic is presented. Actuators for this purpose are required to be small and light, and still have enough power to control low-frequency vibration. From the viewpoint of applying moment control, two control laws for the active sink method are derived; one is to eliminate incident waves and the other to suppress transmitted waves. A standing wave suppression type state control method, which makes possible the dormancy of vibration modes, is also presented. Next, the ABC method is presented, by means of which a vibration-free state in a beam is achieved. The control effects due to thess methods are discussed. Experimental results using the moment-driven actuators are also presented, demonstrating the effectiveness of these methods. Finally, the effect of structural damping of a beam on the control effect of the wave control method is discussed, and the relationship between power flow and structural damping clarified.
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