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Automobile lateral stability improving method based on stable state prediction

A stable state and stability technology, applied in the field of vehicle lateral stability improvement based on steady state prediction, can solve problems such as difficult commercial use, heavy computing burden, and limitations

Active Publication Date: 2021-03-30
CHANGCHUN UNIV OF TECH
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, the nonlinear model predictive control needs to solve the nonlinear optimization problem with constraints online, the computational burden is heavy, and it is limited by the current hardware level, so it is difficult to realize commercial use in a short time

Method used

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  • Automobile lateral stability improving method based on stable state prediction
  • Automobile lateral stability improving method based on stable state prediction
  • Automobile lateral stability improving method based on stable state prediction

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Embodiment Construction

[0083] The present invention will be described in detail below in conjunction with the accompanying drawings and implementation.

[0084] figure 1 It is a schematic diagram of the system structure of a vehicle lateral stability improvement method based on steady state prediction in the present invention. Judgment module 4. Expected yaw rate and side slip angle calculation module 1 is used to determine the expected yaw rate and side slip angle; model predictive controller 2 optimizes and solves the front wheel angle of the car and inputs it to the CarSim vehicle model to realize the car's lateral Swing rate and center-of-mass sideslip angle tracking control; CarSim vehicle model 3 is used to output the actual state quantity of the car, including car longitudinal speed, yaw rate and center-of-mass side-slip angle; stability determination module 4 is used to determine the trend of the car's stable state, and select Tire State Stiffness.

[0085] Below with a certain car model ...

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Abstract

The invention relates to an automobile lateral stability improving method based on stable state prediction. The method is characterized in that an expected yaw velocity and side slip angle calculationmodule, a stability judgment module, a model prediction controller and a CarSim vehicle model are included; the expected yaw velocity and side slip angle calculation module is used for determining the expected automobile yaw velocity and side slip angle; the stability judgment module is used for determining the automobile stable state trend; the CarSim vehicle model is used for outputting theautomobile actual state quantity, and the actual state quantity comprises the longitudinal velocity, the yaw velocity and the side slip angle of the automobile; and the model prediction controller optimizes and solves the front wheel turning angle of the automobile and inputs the front wheel turning angle to the CarSim vehicle model, so that the yaw velocity and the side slip angle of the automobile are tracked and controlled.

Description

Technical field: [0001] The invention relates to the field of automobile lateral stability control, in particular to a method for improving automobile lateral stability based on stable state prediction. Background technique: [0002] Since the world's first fatal car accident occurred in the United Kingdom in 1986, more than 40 million people have died in traffic accidents around the world. Studies have shown that about 40% of traffic accidents at medium and high speeds are related to vehicle lateral instability. Therefore, the stability control for vehicle lateral instability has been paid attention by various research institutions and automobile enterprises. Extreme driving conditions mainly refer to driving conditions in which the movement of the car is close to or reaches the dynamic limit due to unexpected situations, harsh environments and extreme road conditions. Most of these accidents are related to the lateral movement of the car. For example, when making an eme...

Claims

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Application Information

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IPC IPC(8): B60W30/02B60W30/04
CPCB60W30/02B60W30/04B60W2520/125B60W2520/10B60W2520/18B60W2520/26B60W40/064Y02T10/40
Inventor 李绍松王旭阳卢晓晖崔高健王彦贺王寒金羡范阳群
Owner CHANGCHUN UNIV OF TECH
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