STEERING DEVICE OF VEHICLE

摘要

In a vehicle steering apparatus of a steer-by-wire system, front wheels are controlled to be turned by a computer program processing. A displacement/torque conversion section 51 converts a steering angle ¸ into a steering torque Td that is in relation of exponential function. A torque/lateral-acceleration conversion section 52 converts the steering torque Td into an anticipated lateral acceleration Gd (or anticipated yaw rate ³d and anticipated turning curvature Ád) that is in relation of exponentiation function and that serves as a vehicle motion state quantity that can be perceived by a human. A turning angle conversion section 53 calculates a target turning angles ´d necessary for the vehicle to move with the anticipated lateral acceleration Gd (or anticipated yaw rate ³d and anticipated turning curvature Ád). A turning control section 60 controls the steered wheels to be turned into the target turning angle ´d. A driver turns the handle, feeling the lateral acceleration, and hence, the driver can easily drive the vehicle.