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

A stability control method for differential power steering of electric vehicles driven by in-wheel motors

A technology of stability control and in-wheel motor, applied in the direction of automatic steering control components, power steering mechanism, steering rods, etc., can solve problems such as danger and instability

Inactive Publication Date: 2019-03-26
HEFEI UNIV OF TECH
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, if the power assist produces an excessive positive yaw moment, it may cause the car to quickly become oversteer, tend to be unstable, and cause danger.

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
  • A stability control method for differential power steering of electric vehicles driven by in-wheel motors
  • A stability control method for differential power steering of electric vehicles driven by in-wheel motors
  • A stability control method for differential power steering of electric vehicles driven by in-wheel motors

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0071] Such as figure 1 , figure 2 as shown, figure 1 , figure 2 The invention proposes a method for controlling the stability of a differential power steering of an electric vehicle driven by an in-wheel motor.

[0072] refer to figure 1 , figure 2 , the hub motor drive electric vehicle differential power steering stability control method that the present invention proposes, comprises the following steps:

[0073] S1. Obtain the reference yaw rate of the car, and obtain the actual yaw rate and the actual side slip angle of the car, and calculate the difference between the reference yaw rate and the actual yaw rate of the car to obtain the yaw rate deviation, and extract the yaw rate The deviation and the actual center-of-mass sideslip angle constitute the characteristic state;

[0074] Specifically, it includes collecting the actual center-of-mass side slip angle β and actual yaw rate ω of the vehicle dynamics model r , and obtain the reference yaw rate and for th...

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

The invention discloses a control method for differential-motion power-assisted steering stability of an electric car driven by a wheel hub motor. The method comprises the following steps that (1) the characteristic states formed by yaw velocity deviation and actual side slip angles are extracted; (2) based on the extension theory, extension coordination control correlation functions under different set states are calculated; (3) according to the correlation functions, the corresponding differential-motion power-assisted moment weight coefficient and yawing moment weight coefficient of the correlation functions under the different set states are determined; (4) a differential-motion power-assisted steering controller is built and combined the differential-motion power-assisted moment weight coefficient to obtain the differential-motion power-assisted moment; (5) a yawing moment controller is built and combined with the yawing moment weight coefficient to obtain the yawing moment; (6) according to the actual car speed information, through PID controlling, the total driving turning moment needed by the target car speed is obtained; and (7) the differential-motion power-assisted moment, the yawing moment and the total driving turning moment are distributed, and constraint conditions are built so as to meet the different requirements of a car under different states for turning moment adjustment.

Description

technical field [0001] The invention relates to the technical field of new energy vehicles, in particular to a method for controlling the stability of a differential power steering of an electric vehicle driven by an in-wheel motor. Background technique [0002] The electric vehicle driven by in-wheel motor has the characteristics of independently controllable four-wheel torque, and has significant advantages in vehicle stability control and steering assistance. [0003] In terms of steering assistance, by adjusting the driving torque of the steering wheel, the driving force of the left and right steering wheels is changed, so that the driving force difference acts on the steering system to provide assistance for the driver's steering. This process is called differential power steering. (differential drive assisted steering, DDAS for short). In electric vehicles driven by in-wheel motors, DDAS can not only replace the role of electric power steering (EPS), but also simplify...

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
Patent Type & Authority Patents(China)
IPC IPC(8): B62D5/00B62D7/14B62D6/00B62D137/00G06F17/50
CPCB62D5/00B62D6/00B62D7/14G06F30/20
Inventor 汪洪波陈无畏孙晓文
Owner HEFEI UNIV OF TECH
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