Electric power steering control
US5704446A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 2, 1995 |
| Grant date | Jan 6, 1998 |
| Priority date | — |
| Expiry date | Oct 2, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62D5/0466
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An electric power steering control apparatus comprising a vehicle steering wheel, a torque sensor for sensing torque in the vehicle steering column, a motor for providing motive force power assist to the steering system, a controller receiving the torque sensor signal and providing a motor control command to the motor responsive thereto, wherein the motor provides the motive force power assist responsive to the motor control command, and a high pass/low pass filter in the controller, wherein the high pass/low pass filter isolates low frequency components of the sensed vehicle steering system torque representing operator input torque and wherein the controller, responsive to the low frequency components determines a first, driver responsive, component of the motor control command, wherein the high pass/low pass filter isolates high frequency components of the sensed vehicle steering system torque and wherein the controller, responsive to the high frequency components, determines a second component of the motor control command.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.