Lateral stability control method for four-wheel drive based on time-varying speed

A technology of lateral stability and control method, applied in the direction of control device, etc., can solve problems such as vehicle slip detection or tail drift.

Active Publication Date: 2019-11-29
GUANGDONG UNIV OF TECH
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Problems solved by technology

If the deflection angular velocity reaches a threshold value, it means that the car is more likely to encounter dangerous conditions such as skidding or tail flicking

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  • Lateral stability control method for four-wheel drive based on time-varying speed
  • Lateral stability control method for four-wheel drive based on time-varying speed
  • Lateral stability control method for four-wheel drive based on time-varying speed

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Embodiment Construction

[0098] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, 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. Obviously, the described embodiments It is a part of the embodiments of the present invention, not all of them; based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work all belong to the protection scope of the present invention.

[0099]This embodiment proposes a yaw moment control method based on time-varying speed. Considering that the speed of the vehicle is time-varying, the appropriate yaw moment to be provided is calculated through the designed controller, and the above two parameters are controlled at a suitable Then the calculated yaw moment is distributed to the four wheel...

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Abstract

The invention relates to the technical field of automobile stability control and in particular to a lateral stability control method for a four-wheel drive based on time-varying speed, including the following steps of: T1, acquiring the inherent parameter and the real-time parameter of the four-wheel drive; T2, establishing an automobile control model system by using the parameters in the T1; T3,designing a LPV controller in consideration of the time-varying speed for the system in the T2; and T4, allocating the torque of the four-wheel drive based on a result of the T3. The method, in consideration of the time-varying speed of the automobile, calculates the required appropriate yawing torque by the designed controller to control the above two parameters within a suitable range; then allocates the calculated yawing torque to the four wheels by a lower controller to improve the handling performance of the automobile, improve the lateral stability of the automobile, reduce the possibility of dangerous situations during the operation of the automobile, improve riding comfort, and achieve good creativity.

Description

technical field [0001] The invention relates to the technical field of vehicle stability control, in particular to a method for controlling the lateral stability of a four-wheel drive vehicle based on time-varying speed. Background technique [0002] Energy shortage and ecological deterioration are two major problems faced by human beings. As a limited natural resource on the earth, petroleum resources are gradually being exhausted. And the vehicle that adopts gasoline as fuel, its tail gas emission also is unavoidable problem. With the prosperity of people's lives, the number of traditional cars has increased rapidly, followed by a sharp increase in vehicle exhaust emissions, which has become one of the main causes of smog. Smog is a huge threat to people and the ecological environment. Therefore, developing new energy vehicles and reducing emissions has become a global trend. As a reliable, widely sourced and environmentally friendly energy source, electric energy will...

Claims

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Application Information

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IPC IPC(8): B60W30/02B60W50/00
CPCB60W30/02B60W50/00B60W2050/0019
Inventor 鲁仁全李鹏旭李攀硕李鸿一周琪
Owner GUANGDONG UNIV OF TECH
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