Vehicle anti-rollover control device and method based on micro sideslip

Abstract

The invention discloses an automobile rollover prevention control device and method based on slight sideslip. The device comprises first to fourth force sensors, a vehicle speed sensor, a CCD camera,a longitudinal acceleration sensor, a lateral acceleration sensor, a yaw rate sensor, first to fourth electromagnetic valve spray heads, a hydraulic pump, a water tank, a road surface adhesion estimator and a control unit. When an automobile runs in a curve on a high-adhesion road surface, the vertical force of four tires is detected by the force sensors, so that the lateral load transfer rate (LTR) is obtained. When the LTR value exceeds a threshold value, the liquid spraying time of a liquid spraying device is calculated according to the mapping relation of centrifugal force, lateral force and lateral acceleration, and the first to fourth electromagnetic valve spray heads are controlled to spray liquid to the four tires, so that the effects of reducing the road surface adhesion coefficient and generating small slippage are achieved. The device has the advantages of simple structure, clear principle and convenient use, effectively restrains the risk of rollover of the automobile on the road surface with a high adhesion coefficient, and improves the active safety of the automobile.

Description

technical field [0001] The invention relates to the field of active safety control of automobiles, in particular to an automobile anti-rollover control device and method based on tiny sideslip. Background technique [0002] Nowadays, automobiles have been closely connected with people's production and life. While bringing great convenience to people's travel, they have also caused many automobile safety accidents. Car rollover is one of the major factors causing car safety accidents. In the working conditions of high adhesion road surface coefficient, high vehicle speed and small road curvature radius, the car often has a large angle of body roll or even rollover. Therefore, controlling body roll and preventing body rollover has become a key issue in the field of automotive active safety research. [0003] Most of the current methods of controlling body roll are to use the braking system to reduce the centrifugal force of the car through the deceleration of the car. For e...

AI Technical Summary

Problems solved by technology

But there are also disadvantages. If the car braking system is passive braking, it will rely too much on the driver's judgment; and if the car is tilted at a large angle, rash braking may even bring about the opposite result, which will increase the risk of car rollover.

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