Anti-rollover early warning system for heavy vehicles based on perceived load and active braking

Abstract

The invention discloses a heavy-duty truck anti-rollover warning system based on sensing load. Suspension displacement is received by a displacement sensor; an acceleration signal is received by a transverse acceleration sensor; the two signals are processed correspondingly; the processed signals, in combination with a mechanical model calculated, are subjected to substitution to calculate valuesof left front, left rear, right front and right rear support reactions; the values are introduced into a lateral load transfer ratio LTR model to calculate real-time lateral load transfer ratio. Changes in suspension spring load pressure can be measured in real time so as to obtain the up-to-date position of a center of mass; magnitudes of support reactions at four wheels are acquired in real time; the magnitudes are introduced to the LTR model to calculate lateral load transfer ratio that has good accuracy and timeliness, and measured value and operating state delaying is relieved; dynamic load is measured by the heavy-duty truck anti-rollover warning system based on sensing load and meets the characteristics of a heavy-duty truck, high center of mass and low stability in turning.

Description

technical field [0001] The invention relates to the field of anti-rollover of automobiles, in particular to a heavy-duty vehicle anti-rollover early warning system based on perceived load and active braking. Background technique [0002] Currently, most rollover warning algorithms are based on lateral acceleration and roll angle and lateral load transfer ratio (LTR) thresholds. The main researches at home and abroad include: warning technology based on rollover signal threshold, such as selecting lateral acceleration and roll angle as rollover performance indicators; model-based rollover early warning technology: such as selecting lateral acceleration, roll angle and LTR as rollover indicators. Early warning performance indicators. Another relatively new technology is the anti-rollover early warning and control system of the vehicle motion attitude prediction technology (TTR) to evaluate the degree of rollover danger. However, the lateral load transfer ratio (LTR), which i...

AI Technical Summary

Problems solved by technology

Taking the vehicle lateral acceleration and roll angle as the rollover threshold value is based on the measured value or estimated value of the vehicle state obtained at the current moment to judge the degree of rollover risk, and the safety risk of rollover that will occur if the vehicle continues to drive in this state cannot be predicted in advance

[0005] 2. Domestic and foreign literatures mainly focus on the static roll stability of heavy vehicles during steady steering, and there are few literatures on dynamic rollover.

[0006] 3. Lack of super real-time early warning of vehicle rollover

However, the chassis structure and braking system of domestic mainstream trucks are relatively simple, and the modification of later devices is difficult and economical. I personally think that TTR is suitable for automobiles.

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