APPARATUS AND METHOD FOR DETECTING FAILURE OF TORQUE SENSOR FOR MOTOR-DRIVEN POWER STEERING SYSTEM

Disclosed are apparatuses and methods for detecting a failure of a torque sensor for a motor-driven power steering system, the apparatus including a processor configured to detect a failure in a first torque sensor and a second torque sensor based on main torque signals and sub-torque signals, compare a first torque value of the first torque sensor and a second torque value of the second torque sensor, in response to the first torque sensor and the second torque sensor being normal, measure an amount of change in first torque of the first torque sensor and an amount of change in second torque of the second torque sensor by applying electric current to a motor, in response to the comparison result being abnormal, and determine a failure in the first torque sensor and the second torque sensor based on the amount of change in first torque and second torque.