Self-calibration method for electric power steering system
US8483913B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 1, 2011 |
| Grant date | Jul 9, 2013 |
| Priority date | — |
| Expiry date | Oct 5, 2031 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62D5/0457
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The present invention discloses a self-calibration method for an electric power steering system, which can self-calibrate the sensors to a normalized state to prevent from signal distortion, whereby to maintain stable steering sense of the driver and promote robustness and performance of the EPS system. The self-calibration method includes a signal offset compensation tactic and a zero-point signal self-calibration tactic. The present invention determines whether to undertake self-calibration according to judgement tactics, including a sensor power supply judgement tactic, a sensor correctness judgement tactic, and a self-calibration triggering condition. The self-calibration method can increase the correctness of sensors, maintain the original steering-assisting function and promote robustness of the EPS system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.