Abstract
This paper presents the method of semi-active control design considered with characteristic of earthquake motion and sensors placement for 4-story base isolated structure with 4 oil dampers whose damping coefficient can be changed at two steps. This method uses information of both sensor placement and structural response in the control design at the same time. The relationship between the sensor placement and control effect come out in this paper. The genetic algorithm is applied to multi-layered neural network and this algorithm is used to adjust the neural network parameters in learning. We can realize reduction of the structural response to use more sensors and the relationship between the sensor placement and control effect under three different earthquake motions by the proposed control design method.
