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Vehicle control method and device

A vehicle, first-of-its-kind technology, applied in control devices, vehicle components, transportation and packaging, etc., can solve problems such as reducing vehicle speed

Active Publication Date: 2020-08-04
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the braking action will reduce the speed of the vehicle, it is generally not used to improve vehicle handling by braking force vector control

Method used

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  • Vehicle control method and device
  • Vehicle control method and device

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Embodiment Construction

[0060] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

[0061] There are three main types of vehicle steering characteristics: neutral steer, understeer, and oversteer. Among them, neutral steering refers to steering under equal radius, and the steering angle is not required to change when the vehicle speed changes. Understeer refers to steering under equal radius, and the steering angle gradually increases with the increase of vehicle speed. Therefore, when a vehicle with a relatively high speed turns, the driving track deviates outward due to the large steering angle, resulting in vehicle instability, such as figure 1 shown. Excessive steering refers to turning at a constant radius, and the steering angle gradua...

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Abstract

The invention relates to a vehicle control method and device for achieving combined control over the maneuverability and stability of a vehicle. The method specifically comprises the steps that a roadadhesion coefficient, a first parameter, a vehicle maneuverability factor of a vehicle, a steering angle of the vehicle and a longitudinal speed of the vehicle are obtained, wherein the first parameter is the vector acceleration of the vehicle or the side slip angle of the mass center of the vehicle; weighting is performed on a vehicle stability factor and the vehicle maneuverability factor of the vehicle based on the road adhesion coefficient and the first parameter to obtain a steering characteristic factor; and a target yaw velocity is determined based on the steering characteristic factor, the steering angle and the longitudinal velocity.

Description

technical field [0001] The present application relates to the technical field of vehicle control, in particular to a vehicle control method and device. Background technique [0002] There are three main types of vehicle steering characteristics: neutral steer, understeer, and oversteer. Among them, neutral steering refers to steering under equal radius, and the steering angle is not required to change when the vehicle speed changes. Understeer refers to steering under equal radius, and the steering angle gradually increases with the increase of vehicle speed. Therefore, when a vehicle with a relatively high speed turns, the driving track deviates outward due to the large steering angle, resulting in vehicle instability, such as figure 1 shown. Excessive steering refers to turning at a constant radius, and the steering angle gradually decreases with the increase of vehicle speed. Therefore, when a vehicle with a relatively high speed turns, the driving track is inwardly dev...

Claims

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Application Information

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IPC IPC(8): B60W50/00
CPCB60W50/0098B60W2520/10B60W2540/18B60W2520/20
Inventor 刘栋豪张永生张伟
Owner HUAWEI TECH CO LTD