APPARATUS AND METHOD FOR CONTROLLING ELECTRIC POWER STEERING SYSTEM
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United States of America Patent
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Mar 16, 2017
app pub date -
Sep 14, 2015
filing date -
Sep 14, 2015
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Abstract
According to an embodiment of the present invention, an apparatus for controlling an electric power steering system includes a failure detection unit detecting whether a torque sensor has failed; a first calculation unit calculating an absolute steering angle based on information detected by a motor position sensor; and a second calculation unit calculating an estimated lateral acceleration of a vehicle based on the absolute steering angle calculated by the first calculation unit and velocity of the vehicle received from a velocity sensor, wherein, if a failure of a torque sensor is detected by the failure detection unit, an assist current value is applied to the motor based on the estimated lateral acceleration of the vehicle.
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