This study deals with the optimization problem of a dynamic vibration absorber (DVA) for multi-degree-of-freedom systems subjected to random input with a dominant frequency. A new design method, which optimizes the parameter of DVA composed of such passive elements as a spring and a damper, is proposed. In this method, a suboptimization method based on the optimal control theory is applied for the optimization problem with control structure constraints due to passive elements. This method can consider the input information and the constraints on the stroke of DVAs. The vibration control performance of this method is investigated and is compared with the previous method, in numerical calculations. As a result, the usefulness of the present method is verified.

Active Control of Structural Vibration by Active Mass Damper : Vibration Control of Multi-Degree-of-Freedom System by Single Control Force

Optimal dynamic vibration absorber for multi-degree-of-freedom systems. (Theoretical consideration in the case of random input).

This invention concerns a device for vibration damping of an object (1) moving along a trajectory arranged on a frame (7), whereas the object (1) involves spaces fllled-in with magnetorheologic fluid which moves towards the object (1) and the device contents at least one control electromagnet (2,12) for achieving magnetorheologic fluid condition change to which a signal for vibration damping is fed from a control unit, whereas the control electromagnet/s (2,12) is/are arranged firmly on the frame on which the object's (1) trajectory is positioned. The control electromagnets (2,12) are arranged evenly with regard to the object's (1,5) trajectory (4,14), in case of need evenly to one another. In case of an object (1) pivoted on a frame (7) and fitted with at least one centrifugal pendulum (6) connected to the object (1) through a damper (11) with magnetorheologic fluid which moves towards the object (1) and the device involves at least one control electromagnet (12) for achieving magnetorheologic fluid condition change, to which a signal is fed from a control unit, at least one control electromagnet (12) regulated by controllable power supply for electromagnetic field intensity control is arranged along the circular trajectory (14) of the dampers (11) on the frame (7).

Active Control of Structural Vibration by Active Mass Damper : Vibration Control of Multi-Degree-of-Freedom System by Single Control Force

Citations

Optimal dynamic vibration absorber for multi-degree-of-freedom systems. (Theoretical consideration in the case of random input).

Device for a moving object's vibration damping

Related Papers (5)

Active vibration control system.

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