Abstract
Semi-active control method, which is to maximize the energy transmission from main structure to sub structure using dynamics of the sub structure fully, is proposed. The method ensures the stability of the main structure naturally and restricts the number of state value for control. These features are useful for practical use. The analytical results presented are for a SDOF model, which is controlled by means of semi-active oil damper verified already, with sinusoidal wave input and earthquake wave input. The influences of various parameters on the characteristics of the sub structure and control device are verified.
