Abstract: A rear wheel steering control system and method for vehicles may gradually perform rear wheel steering at a gentle ramp-up slope, compared to a conventional rear wheel steering control system and method, for a predetermined time period when the ignition of a vehicle is turned on in the state in which a front wheel steering angle is generated, to prevent rear wheels from being rapidly steered and to eliminate a sense of difference felt by a driver due to rapid rear wheel steering.

Abstract: The present disclosure provides a steering control method and system for rear-wheel steering that improves driving stability and yaw responsiveness of a vehicle by controlling rear wheels on the basis of a driving state of a vehicle. The method and system receives a vehicle speed and a front-wheel turning angle and calculates a rear-wheel same/inverse-phase control amount; estimates tire slip angles when the vehicle is driven such that the rear wheels are controlled with the same phase; calculates a final rear-wheel turn control value by reflecting a control weight proportioned to the tire slip angle estimation value to the rear-wheel same-phase control amount; and turns the rear wheels on the basis of the final rear-wheel turn control value.

Abstract: An apparatus for controlling a rear wheel steering includes a sensor configured to detect a vehicle speed, a steering angle, yaw rate, and a lateral acceleration of a vehicle; a target yaw rate calculator configured to determine a target yaw rate from information detected by the sensor; a side slip angle estimator configured to estimate a side slip angle from information detected by the sensor; and a rear wheel steering angle control amount calculator configured to determine a rear wheel steering angle control amount by using the yaw rate information detected by the sensor, the target yaw rate calculated by the target yaw rate calculator, and the side slip angle estimated by the side slip angle estimator. The determined rear wheel steering angle control amount is implemented to control the vehicle yaw rate to follow the target yaw rate and the side slip angle to follow 0.

Abstract: An apparatus for controlling a rear wheel steering includes a sensor configured to detect a vehicle speed, a steering angle, yaw rate, and a lateral acceleration of a vehicle; a target yaw rate calculator configured to determine a target yaw rate from information detected by the sensor; a side slip angle estimator configured to estimate a side slip angle from information detected by the sensor; and a rear wheel steering angle control amount calculator configured to determine a rear wheel steering angle control amount by using the yaw rate information detected by the sensor, the target yaw rate calculated by the target yaw rate calculator, and the side slip angle estimated by the side slip angle estimator. The determined rear wheel steering angle control amount is implemented to control the vehicle yaw rate to follow the target yaw rate and the side slip angle to follow 0.