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ESP and EPS combination control method used when vehicle is urgently steered to avoid collision

An emergency steering and joint control technology, applied in the direction of automatic steering control components, steering mechanisms, steering rods, etc., can solve the problems that the car body cannot return, lose accurate judgment, etc.

Inactive Publication Date: 2016-08-03
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the driver encounters an obstacle and turns suddenly, due to tension, fear, etc., he has lost accurate judgment on the steering wheel angle and the posture of the vehicle body, and may be turning the steering wheel indiscriminately. The steering system conflicts with the yaw moment of the ESP to control the body, making it impossible for the body to return to the ideal position

Method used

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  • ESP and EPS combination control method used when vehicle is urgently steered to avoid collision
  • ESP and EPS combination control method used when vehicle is urgently steered to avoid collision
  • ESP and EPS combination control method used when vehicle is urgently steered to avoid collision

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereto.

[0034] Such as figure 1 , figure 2 As shown, the present invention comprehensively considers and shares various motion parameters of the car during emergency steering through a sensor, and the ESP system controls the vehicle through the hydraulic braking system and the engine management system according to the driver's steering wheel angle, pedal operation and vehicle driving state information. The driving / braking force is controlled. While the ESP system reasonably distributes the braking torque of each wheel, it is converted to the steering system by the ECU and provided to the driver by the EPS power-assisted motor to assist the driver to make corresponding adjustments. The EPS system controls the assist torque through the assist motor according to the driver's stee...

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Abstract

The invention discloses a joint control method of ESP and EPS when a vehicle turns to avoid collision in an emergency, including: 1. Obtaining the longitudinal vehicle speed v by using a wheel speed sensor x , use the steering wheel angle sensor to obtain the front wheel angle δ parameter; 2 Calculate the expected angular velocity through the two-degree-of-freedom vehicle dynamics model 3 Calculate the maximum yaw rate to ensure vehicle stability through the road surface adhesion limit 4 compare and If there is a wrong operation, the coordinated control will be carried out. If there is no wrong operation, then the EPS and ESP will work normally; 5. When the driver makes a wrong operation, adjust the power assist torque; Correct the power-assist torque provided by the EPS motor to assist the driver's operation and avoid or weaken the side slip of the front axle caused by the driver's excessive steering wheel.

Description

technical field [0001] The invention relates to a joint control strategy and method of ESP and EPS when an automobile turns in an emergency to avoid collisions, which improves the steering stability of an automobile in an emergency turn, and belongs to the technical field of driving safety. Background technique [0002] With the increase of car ownership, there are more and more potential safety hazards on expressways, and a series of traffic accidents often occur due to car rear-end collision, instability, and turning. In order to improve the active safety performance of automobiles, the development of automobile Electronic Stability Program (ESP) is becoming more and more mature. When the driver encounters an obstacle in front of the car, the car often loses stability and turns after the driver turns. The function of ESP is to use the intervention of the power system and the braking system to help the vehicle overcome the tendency to deviate from the ideal track and provid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W30/045B60W30/10B62D5/04B62D6/00B62D101/00B62D137/00
CPCB60W30/045B60W30/10B60W2710/202B62D5/0463B62D6/00
Inventor 袁朝春范兴根
Owner JIANGSU UNIV
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