Abstract
This paper describes the controller design scheme for the hydraulic system in Direct Yaw Moment Control (DYC) System. The hydraulic system considered in this paper operates over a wide range of the operational conditions in ambient temperature. Regardless of changes in operational conditions, the hydraulic system is required to achieve the desirable speed of response and the stability. This paper, therefore, proposed two-degree-of-freedom controller with reduced-order controllers to satisfy these requirements. From the results of proving ground tests, it is confirmed that the proposed control system satisfies the requirements imposed on the hydraulic system for DYC system.