Redundant Control System and Method for Autonomous Steering

An embodiment is a redundant control system for autonomous steering including a sensor in a vehicle configured to sense information for autonomous driving, a main steerer configured to actuate a steering motor to perform steering, first autonomous controller configured to use data provided from the sensor to determine a target steering angle through real-time lane recognition and to control the main steerer, an auxiliary steerer configured to use a brake module composed of a main brake and an auxiliary brake to perform steering, and a second autonomous controller configured to control the auxiliary steerer to perform supplementary steering through partial braking and application of additional actuation in the event of abnormal operation of an automatic steering function using the first autonomous controller and to control backup braking through the auxiliary brake when the main brake fails.