STEERING ANGLE ESTIMATION DEVICE AND METHOD FOR ELECTRIC STEERING SYSTEM

Abstract: a steering angle estimation device of an electric steering system. a first operator calculates a yaw rate. a second operator calculates an average value of rear wheel speeds. a kalman filter predicts a yaw acceleration by filtering the yaw rate. a third operator estimates a steering angle also taking into account a slip angle by using the yaw rate and the yaw acceleration. a weight adjuster adjusts weights of the wheel speeds by averaging rear right and left wheel speeds calculated by the second operator. a multiplication operator multiplies weight values output by the weight adjuster with the steering angle. a steering angle conversion switch outputs a final steering angle by selecting the estimated steering angle output from the multiplication operator or a motor steering angle measured from a motor of a motorized power steering system by the weight values.

Inventor(s): Tae Hong KIM

CPC Classification: B62D6/002 (Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits (means for initiating a change in direction ; steering valves ; combined with means for inclining the vehicle body or wheels on bends ))

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