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Forewarning method and forewarning system of road vehicle curve side rollover

A technology for road vehicles and early warning systems, which is applied in the direction of signal devices, etc., can solve the problems of increasing application difficulty, complex algorithms, and failure to consider the impact of rollover stability, so as to achieve timely and accurate detection data, reduce the probability of misjudgment, The effect of simple system structure

Inactive Publication Date: 2013-06-26
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the lateral acceleration can be easily measured by the acceleration sensor, and the static rollover limit value can be obtained through experiments. However, this method does not consider the influence of road roughness excitation on rollover stability, and is only applicable to smooth roads. Vehicle rollover early warning; vehicle body roll angle and vehicle body roll angle speed threshold are dynamically changing under different driving conditions, which increases the difficulty of application; single-axis lateral load transfer rate does not consider the overall trend of vehicle rollover; Although the estimated remaining time of flipping is more accurate, the algorithm is more complicated
[0004] The road vehicle rollover warning system in the above prior art is often only applicable to a certain type of two-axle vehicle, and cannot predict the rollover trend of a multi-axle vehicle, which restricts the applicability of the rollover warning system

Method used

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  • Forewarning method and forewarning system of road vehicle curve side rollover
  • Forewarning method and forewarning system of road vehicle curve side rollover
  • Forewarning method and forewarning system of road vehicle curve side rollover

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Embodiment 1: Critical value of curve rollover factor of SUV vehicle

[0069] For the SUV model, the virtual prototype model is selected, and the dynamic simulation is carried out by the multi-body system dynamics analysis software CarSim, and the critical value of the rollover factor of different vehicles is calculated by using formula (2), formula (3) and formula (4).

[0070] In CarSim, set the scene of the SUV vehicle as a typical curve with a radius of 100m that is prone to rollover, and input different vehicle speeds to observe the rollover status of the vehicle. When the vehicle speed is set to 80km / h, the SUV enters the curve The rollover occurred after 7.4 seconds.

[0071] The SUV car is a two-axle vehicle, and one end of each axle is a wheel. When calculating the sum of the vertical contact force between the wheel at one end of each axle and the ground, it is the vertical contact force between one wheel at the end and the ground. For a two-axle vehicle, the...

Embodiment 2

[0076] Curve rollover factor critical value of embodiment 2 passenger car

[0077] For the passenger car model, the virtual prototype model is selected, and the dynamic simulation is carried out by the multi-body system dynamics analysis software TruckSim, and the critical value of the rollover factor of different vehicles is calculated by using formula (2), formula (3) and formula (4).

[0078] In TruckSim, set the scene of the bus as a typical curve with a radius of 100m that is prone to rollover, and input different vehicle speeds to observe the rollover state of the vehicle. When the vehicle speed is set to 90km / h, the bus enters the curve 2.4 Seconds later a rollover occurred.

[0079] A passenger car is a two-axle vehicle with one wheel at one end of the front axle and two wheels at one end of the rear axle. When calculating the vertical contact force between the wheels at one end of the rear axle and the ground, it is the sum of the vertical contact forces between the ...

Embodiment 3

[0084] Embodiment 3 The critical value of the corner rollover factor of a two-axle flat truck

[0085] For the two-axle flat-top truck, the virtual prototype model is selected, and the dynamic simulation is carried out by the multi-body system dynamics analysis software TruckSim, and the critical rollover factors of different vehicles are calculated by using formula (2), formula (3) and formula (4) value.

[0086] In TruckSim, set the scene of a two-axle flat-top truck as a typical curve with a radius of 100m that is prone to rollover, and input different speeds to observe the rollover state of the vehicle. When the speed is set to 80km / h, the The van rolled over 2.8 seconds into the corner.

[0087] A two-axle truck is a two-axle vehicle with one wheel on one end of the front axle and two wheels on one end of the rear axle. When calculating the vertical contact force between the wheels at one end of the rear axle and the ground, it is the sum of the vertical contact forces ...

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Abstract

The invention relates to a forewarning method and a forewarning system of road vehicle curve side rollover. The forewarning method and the forewarning system of the road vehicle curve side rollover are characterized by comprising the steps: carrying out real-time detection on a vehicle which runs in a curve, obtaining vertical shearing stress of a vehicle shaft end portion and a wheel vertical accelerated speed corresponding to the vehicle shaft end portion, and thus obtaining contact force between wheels and the ground; obtaining a side rollover factor of each vehicle shaft according to the contact force, and then obtaining a comprehensive side rollover factor of all vehicle shafts in a weighting mode, and sending out a warning through an alarm device when the weighted comprehensive side rollover factor exceeds a side rollover factor critical value. The forewarning method and the forewarning system of the road vehicle curve side rollover can enable road vehicle curve travel to be safe and reliable, and effectively reduce possibility of occurrence of side rollover risks.

Description

technical field [0001] The invention relates to a rollover early warning method and an early warning system for a road vehicle running on a curve. Background technique [0002] The vehicle rollover accident on the curve is a common road traffic accident. Excessive centrifugal force makes the vehicle lose its driving stability. Once it occurs, it often leads to serious casualties and major economic losses. [0003] A series of studies have been carried out on the vehicle rollover warning system at home and abroad, and some performance indicators reflecting the rollover trend and corresponding rollover warning schemes have been proposed. The indicators describing vehicle rollover mainly include lateral acceleration, body roll angle, body roll angular velocity, uniaxial lateral load transfer rate, estimated remaining time of rollover, etc. Among them, the lateral acceleration can be easily measured by the acceleration sensor, and the static rollover limit value can be obtained...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60Q9/00
Inventor 陈一锴张梦雅石琴董满生姜康冯忠祥
Owner HEFEI UNIV OF TECH