Abstract
The independent control is one of the useful ways to build a servo controller in the industrial field. However, that has problem not to synchronize another servo controller. Therefore, accurate synchronous control based on H_2 control theory with pole restriction is proposed, and effectiveness of this theory is verified by comparing the independent controller with the synchronous controller in this paper. As a result, when disturbance is applied, the synchronous controller is better than the independent controller, although the independent controller is better than the synchronous controller from view point of state characteristics.