Early warning method and system for vehicle rollover

Abstract

The invention discloses an early warning method and system for vehicle rollover. The early warning method comprises the steps that a roll velocity and a lateral acceleration of a vehicle body collected by a smart phone are obtained; the smart phone is fixed to a center console inside a vehicle; the roll velocity and an angle of roll are estimated by using a Kalman filter state observer, an estimation value of the roll velocity and an estimation value of the angle of roll are obtained; according to the angle of roll and an installation vertical deviation, the lateral acceleration is corrected to obtain a lateral acceleration correction value; according to the estimation value of the angle of roll, the estimation value of the roll velocity and the lateral acceleration correction value, the vertical load transfer rate of the vehicle is calculated; an alarm action of the corresponding level is triggered according to the level to which the vertical load transfer rate of the vehicle belongs; and alarm prompts of different levels correspond to the different levels of vertical load transfer rates, and the different levels of the vertical load transfer rates correspond to different value ranges of the vertical load transfer rates. According to the early warning method and system for the vehicle rollover, the robustness can be improved, meanwhile, the error of the vehicle rollover early warning is reduced, and the accuracy is improved.

Description

technical field [0001] The invention relates to the field of vehicle early warning, in particular to a vehicle rollover early warning method and system. Background technique [0002] With the progress and development of the society, the rapid development of the transportation system, the popularity of automobiles is gradually increasing, and the number of domestic automobiles is also rising in a straight line. With the increase of road vehicles, the frequency of traffic accidents is also increasing. Among many traffic accidents every year, the incidence rate of vehicle rollover is about 5%, and its fatality rate is as high as 30%. On models with a high center of mass such as SUVs, buses, and trucks, the vehicle is more likely to rollover when changing lanes urgently or turning at high speed. [0003] The driver is often sensitive to the vehicle's lateral acceleration, but the vehicle's roll stability cannot be accurately judged by the lateral acceleration, and the vehicle'...

AI Technical Summary

Problems solved by technology

[0003] The driver is often sensitive to the vehicle's lateral acceleration, but the vehicle's roll stability cannot be accurately judged by the lateral acceleration, and the vehicle's roll angle is small before it is out of control, so it is difficult for the driver to detect it, so a vehicle roll stability judgment is needed Method to warn the driver of the potential rollover risk

[0004] Most of the existing technologies directly use the sensor signal as the basis for judging the body tilt, resulting in sensitivity to the accuracy of the sensor signal, poor robustness, and easy to be disturbed by the external environment; at the same time, the increase of sensors will increase its application cost

Moreover, the lateral acceleration calculation models established in some existing technologies are only suitable for steady-state steering conditions. When the vehicle enters the limit condition of the non-linear region with tire adhesion, the model error will increase sharply

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