Title:
ELECTRIC POWER STEERING DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/098839
Kind Code:
A1
Abstract:
[Problem] To provide an electric power steering device which has multiple angle sensors mounted on the steering shaft in addition to an angle sensor mediated by a gear mechanism, and which learns characteristics of the gear mechanism, and monitors and performs diagnostics by using the learning results and the signal of the angle sensor mediated by the gear mechanism to estimate the signal of the other angle sensors so as to be capable of serving as a backup for these. [Solution] This electric power steering device is provided with at least a first angle sensor which detects a first steering angle via a gear mechanism, and a second angle sensor which detects a second steering angle not via a gear mechanism, and is provided with a correction offset calculation unit which learns the characteristics of the gear mechanism and calculates the correction offset, and a steering angle estimation unit which uses the correction offset to estimate the second steering angle.
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Inventors:
SAWADA HIDEKI (JP)
SUGAWARA TAKAYOSHI (JP)
MINAKI RYO (JP)
SUGAWARA TAKAYOSHI (JP)
MINAKI RYO (JP)
Application Number:
PCT/JP2016/082750
Publication Date:
June 15, 2017
Filing Date:
November 04, 2016
Export Citation:
Assignee:
NSK LTD (JP)
International Classes:
B62D6/00; B62D5/04; B62D113/00; B62D119/00
Foreign References:
| JP2010269763A | 2010-12-02 | |||
| JP2007008299A | 2007-01-18 | |||
| JP2014055629A | 2014-03-27 | |||
| JP2012116292A | 2012-06-21 | |||
| JP2006292452A | 2006-10-26 | |||
| JP2012025262A | 2012-02-09 |
Attorney, Agent or Firm:
AGATA Yuzo (JP)
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