Hands-on/-off detection in a steer-by-wire system
US10457323B2 · kind B2 · utility
Assignees
Inventor
Key dates
| Filing date | Apr 20, 2017 |
| Grant date | Oct 29, 2019 |
| Priority date | — |
| Expiry date | Apr 20, 2037 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60W2050/0054
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A steer-by-wire steering system may include a steering adjuster that is electronically controlled depending on driver input, a feedback actuator transmitting feedback from a road, and a control unit that actuates the feedback actuator and the steering adjuster. The control unit comprises an estimator including a monitor and a model of the feedback actuator. The estimator may estimate a driver's steering torque based on measurement values of the feedback actuator and with the model and the monitor, then providing the driver's steering torque as a result. The control unit further comprises a filter unit that analyzes the measurement values of the feedback actuator by determining the damping of amplitudes of predetermined frequency ranges and to provide the result. The control unit further comprises a decision unit that decides whether a driver's hand is in contact with a steering wheel by using the results of the filter unit and the estimator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.