Abstract
Various vibration control methods, including the skyhook control, have been proposed to achieve dynamic response reduction in terms of the absolute response. It is often observed that negative stiffness appears in the behavior of control devices following skyhook control. However, evaluation and the significance of negative stiffness have not been discussed in past research. In this study, negative stiffness appearing in skyhook control method is theoretically evaluated with the use of equivalent control parameters in the negative stiffness control. Based on the result, relevance of the negative stiffness control to skyhook control is discussed, and the optimal design of the negative stiffness control is proposed.
