Method and apparatus for controlling an electric assist steering system using an adaptive torque filter
US5473231A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 11, 1994 |
| Grant date | Dec 5, 1995 |
| Priority date | — |
| Expiry date | May 11, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62D6/10
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A steering assist system (10) providing assist in response to a steering control signal includes a vehicle speed sensor (56) for sensing vehicle speed and for providing a speed signal having a value indicative of the sensed vehicle speed and a torque sensor (44) operatively connected to a vehicle hand wheel (12) for providing a torque signal indicative of applied steering torque. A controller is connected to the vehicle speed sensor (56) and to the torque sensor (44). The controller includes an adaptive torque filter (80) that maintains a selectable system bandwidth independent of gain changes and vehicle speed changes. The adaptive filter (80) recovers any gain reduction by increasing the frequency of a filter pole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.