Abstract
The electric power steering (EPS) has been used for smaller size automobiles, and it is considered for larger size ones. It is believed that the EPS will replace the hydrauric power steering soon or later. But the EPS control systems has not been studied enough to afford control theories. A new design method of EPS control systems using the scheduled H∞ control is proposed in this paper. Firstly, an analytical model of the EPS is derived. Secondly, the EPS control systems are constructed with a loop shaping technique of closed loop transfer functions based on H∞ criterion. Thirdly, as the system changes according as driving conditions, the scheduled H∞ control is used to design the EPS control systems. Finally, the system is shown useful by simulations.
