Steer-by-wire system stability control method

A technology of system stability and steer-by-wire, which is applied in the direction of control devices, can solve the problems of high cost of feedback signal acquisition, insufficient steering stability of steer-by-wire system, etc.

Active Publication Date: 2020-12-04
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
View PDF5 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the above-mentioned prior art, the object of the present invention is to provide a stability control method for a steer-b

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
  • Steer-by-wire system stability control method
  • Steer-by-wire system stability control method
  • Steer-by-wire system stability control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0089] In order to facilitate the understanding of those skilled in the art, the present invention will be further described below in conjunction with the embodiments and accompanying drawings, and the contents mentioned in the embodiments are not intended to limit the present invention.

[0090] refer to figure 1 Shown, a kind of steer-by-wire system stability control method of the present invention, the steps are as follows:

[0091] Step 1): Establish a four-wheel steer-by-wire system and a vehicle model;

[0092] Establish four-wheel steer-by-wire system and vehicle model, and estimate four-wheel cornering stiffness, lateral speed and yaw rate:

[0093]

[0094]

[0095] In the formula, v x is the longitudinal vehicle speed; v y is the lateral vehicle speed; γ is the yaw rate; C d is the air resistance coefficient; A is the windward area; ρ is the air density; f s is the coefficient of rolling resistance; m is the mass of the vehicle; g is the acceleration of gr...

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 steer-by-wire system stability control method. The method comprises the following steps that a four-wheel steer-by-wire system and a whole vehicle model are established; thefour-wheel cornering stiffness, the lateral vehicle speed and the yaw velocity are estimated by adopting an extended Kalman filter algorithm with limited gain; a sliding mode control algorithm is adopted to design an ideal yaw velocity and ideal lateral vehicle speed tracking controller, and stability control over the steer-by-wire system is completed. According to the method, the tire cornering stiffness of the four-wheel steering system and the relevant feedback state of the vehicle are estimated in real time, a robust tracking control strategy is designed to track the lateral vehicle speedand the yaw velocity of the vehicle, and the stability and the driving safety of the whole vehicle are improved while a driver instruction is responded.

Description

technical field [0001] The invention belongs to the field of steering-by-wire systems for automobiles, and specifically refers to a stability control method for a steering-by-wire system. Background technique [0002] The steering system is one of the key components of the vehicle. It can not only ensure that the car can turn according to the driver's will, but also is closely related to the steering stability of the car. How to reasonably design the steering system to make the car have better maneuverability is always an important topic for designers to study. In today's high-speed vehicles, non-professional drivers, and dense traffic flow, the design of easy-to-maneuverability of cars has become extremely important for more driving groups of different levels. The development of the steer-by-wire system just caters to this objective demand. It is a new generation of steering system developed after the electric power steering system. [0003] Existing steer-by-wire systems...

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): B60W30/045B60W50/00
CPCB60W30/045B60W50/00B60W2050/0019B60W2050/0031B60W2050/0037
Inventor 张寒赵万忠
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap