公开(公告)号：US09610973B2

公开(公告)日：2017-04-04

申请号：US15078455

申请日：2016-03-23

Applicant: Showa Corporation

Inventor： Kyouichi Tagami ,  Katsutoshi Yokoi ,  Eishi Ishimaru ,  Tadayoshi Iwase

IPC: B62D5/04 ,  B62D3/12 ,  B62D6/10

CPC classification number: B62D5/046 ,  B62D3/12 ,  B62D5/0421 ,  B62D5/0472 ,  B62D6/10

Abstract: A motor-driven power steering apparatus including: a base current calculator configured to calculate a base current, which is a base for a target current, based on a detected torque detected by a torque sensor; a band-pass filter configured to allow a predetermined range of frequency components of the detected torque to the pass through the band-pass filter; a base shimmy compensation current calculator configured to calculate a base shimmy compensation current, considered a base for a shimmy compensation current required to suppress a disturbance torque, based on an extracted torque after passing through the band-pass filter; a shimmy compensation current calculator configured to calculate the shimmy compensation current by correcting the base shimmy compensation current according to magnitude of amplitude of the extracted torque; and a final target current determination unit configured to determine the target current based on the base current and the shimmy compensation current.