Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

System And Method For Reducing Steering Wheel Vibration In Electronic Power Steering Systems

A technology of electric power steering and steering wheel, which is applied in the direction of electric steering mechanism, power steering mechanism, automatic steering control components, etc., and can solve problems such as troubled drivers and driver distraction

Active Publication Date: 2014-09-17
GM GLOBAL TECH OPERATIONS LLC
View PDF6 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These vibrations can be perceived by the driver of the vehicle, and these steering wheel vibrations can distract or annoy the driver

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • System And Method For Reducing Steering Wheel Vibration In Electronic Power Steering Systems
  • System And Method For Reducing Steering Wheel Vibration In Electronic Power Steering Systems
  • System And Method For Reducing Steering Wheel Vibration In Electronic Power Steering Systems

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0085] The following detailed description is merely exemplary in nature and is not intended to limit the application and uses thereof. Furthermore, there is no intention to be bound by any expressed or implied theory presented in the preceding technical field, background, brief summary or the following detailed description.

[0086] In this document, relational terms such as first and second etc. may be used merely to distinguish one entity or action from another without necessarily requiring or implying any actual relationship between these entities or actions. This relationship or order. Numerical ordinals such as "first," "second," "third," etc. simply denote different singles of a plurality and do not imply any order or sequence unless expressly defined in the claim language.

[0087] Furthermore, the following description refers to elements or features being "connected" or "coupled" together. As used herein, "connected" may mean that one element / feature is directly conn...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

Methods and apparatus are provided for reducing steering wheel vibrations in electronic power steering systems. The apparatus includes a processor and performs a method that estimates an average angular wheel speed of at least one wheel of the vehicle; determines an average wheel angle from the average angular wheel speed; generates sine and cosine functions of the average angular wheel angle; processes the sine and cosine functions with a steering wheel torque signal received from a torque sensor to extract amplitude components of at least one of the sine and cosine functions; reconstructs the sine and cosine functions using the steering wheel torque signal; combines the sine and cosine functions to provide a control signal, and controls the EPS system via the control signal to attenuate smooth road shake vibrations in a steering wheel of the vehicle.

Description

technical field [0001] The technical field relates generally to electric power steering (EPS) systems, and more particularly, to techniques for reducing periodic steering wheel vibrations that occur in EPS systems. Background technique [0002] Electric power steering (EPS) systems use an electric motor that can be coupled directly to a steering gear or steering column to reduce driver effort in steering the vehicle. During vehicle operation, the driver applies force to the steering wheel in an effort to steer the vehicle. This results in "driver torque" being applied to the shaft coupled to the steering wheel. The torque sensor detects the torque applied to the steering column by the driver and transmits this information to the electronic control unit. The electronic control unit generates motor control signals that are applied to the electric motor, causing the electric motor to produce "motor assist torque" that is combined with driver torque. This combined torque is t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B62D5/04B62D6/00B62D137/00
CPCB62D5/0472
Inventor K.L.奥布利扎耶克J.D.索波奇S.普拉基萨桑
Owner GM GLOBAL TECH OPERATIONS LLC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com