Invention Grant
- Patent Title: Electric power steering apparatus
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Application No.: US15536411Application Date: 2015-12-21
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Publication No.: US10589779B2Publication Date: 2020-03-17
- Inventor: Takayoshi Sugawara , Yousuke Imamura , Masahiro Maeda
- Applicant: NSK LTD.
- Applicant Address: JP Shinagawa-ku, Tokyo
- Assignee: NSK LTD.
- Current Assignee: NSK LTD.
- Current Assignee Address: JP Shinagawa-ku, Tokyo
- Agency: Sughrue Mion, PLLC
- Priority: JP2014-265960 20141226
- International Application: PCT/JP2015/085675 WO 20151221
- International Announcement: WO2016/104427 WO 20160630
- Main IPC: B62D6/00
- IPC: B62D6/00 ; B62D5/04

Abstract:
An electric power steering apparatus includes: a current command value determining section that determines a current command value based on steering torque and vehicle speed; a vibration extracting filter that extracts a first vibration component having a predetermined amplitude and first predetermined frequency range depending on motor angular velocity; a vibration extracting section that extracts a second vibration component having a second predetermined frequency range depending on motor angular acceleration; a first compensation value calculating section that calculates a first vibration suppression compensation value based on the first vibration component extracted by the vibration extracting filter; and a second compensation value calculating section that calculates a second vibration suppression compensation value based on the second vibration component; and suppresses vibrations of the motor by feeding back the first vibration suppression compensation value and the second vibration suppression compensation value calculated to the current command value.
Public/Granted literature
- US20170349208A1 ELECTRIC POWER STEERING APPARATUS Public/Granted day:2017-12-07
Information query
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