Drive-by-Wire (DBW) technologies improve conventional vehicle performance and a Steer-by-Wire (SBW) system is one of the DBW technologies. The control algorithm of the SBW system was designed in this paper. To verify the control algorithm, the SBW system is modeled using the bond graph method. The first aim of the control algorithm is controlling the steering wheel assist motor to make the real vehicle's steering feel and for a vehicle designer to adjust the steering feel as he finds necessary. Therefore, torque map is designed to determine the steering wheel reactive torque. The second aim is controlling the front wheel assist motor to improve vehicle's maneuverability and stability by using understeer and oversteer propensity of a vehicle. Furthermore, high performance control algorithm is proposed in this paper and Active Roll Stability Control (ARSC) method is designed as one of the high performance control algorithm.

In a steer-by-wire (SBW) system in a passenger vehicle, the conventional mechanical linkage between the steering wheel and the front wheel is replaced by electric wires. The SBW system consists of two parts: the steering-wheel system and the front-wheel system. The front-wheel system is the rack-actuating type. This paper proposes a concept for the control of the rack-actuating SBW system. In particular, the controller should behave similarly to a conventional (mechanically linked) steering system. In this paper, the rack-actuating SBW system was modelled using the bond graph method. The actuator controller was designed to minimize the reference signal error. The current research also considers the improvement in steering feel using feedback control of road information, in which the steering-wheel system's control algorithm used the torque map and transfer information of the road to the driver. Verification simulation and performance simulation showed that the rack-actuating SBW controller was available in this paper.

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Drive-by-Wire (DBW) technologies improve conventional vehicle performance and a Steer-by-Wire (SBW) system is one of the DBW technologies. The control algorithm of the SBW system was designed in this paper. To verify the control algorithm, the SBW system is modeled using the bond graph method. The first aim of the control algorithm is controlling the steering wheel assist motor to make the real vehicle's steering feel and for a vehicle designer to adjust the steering feel as he finds necessary. Therefore, torque map is designed to determine the steering wheel reactive torque. The second aim is controlling the front wheel assist motor to improve vehicle's maneuverability and stability by using understeer and oversteer propensity of a vehicle. Furthermore, high performance control algorithm is proposed in this paper and Active Roll Stability Control (ARSC) method is designed as one of the high performance control algorithm.