Research on vehicle rollover-stability dynamic based on energy approach

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Journal of Vibration and Shock ›› 2016, Vol. 35 ›› Issue (24) : 164-174.

HUANG Ming-liang1 ZHENG Min-yi2 ZHANG Bang-ji1 ZHANG Nong2 CHEN Sheng-zhao1

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Abstract

The energy approach is applied to study on the vehicle rollover-stability, and a new comprehensive evaluation method for vehicle rollover-stability is proposed. In order to study this methodology, a 10-DOF vehicle model with nonlinear characteristic is presented, and the comparison of vehicle road test and simulations with vehicle model verified that the model is correct. The rollover-stability index is provided: By calculating the ratio of real-time energy reserve and rollover energy threshold, the rollover energy reserve coefficient (RERC) can be deduced. And the velocity-steering interference coefficient (VSIC) is defined by integrating the vehicle velocity and the steering angle. After then, the comprehensive evaluation index of vehicle rollover stability, which contains the vehicle velocity, roll angle velocity, roll angle and tire steering angle, is established. Furthermore, the presented method is compared with the other vehicle rollover-stability evaluation method by different situation simulation experiments. The result shows that the presented method is correct and applicability.

Key words

rollover-stability / dynamic model / energy threshold / energy stability index

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HUANG Ming-liang1 ZHENG Min-yi2 ZHANG Bang-ji1 ZHANG Nong2 CHEN Sheng-zhao1. Research on vehicle rollover-stability dynamic based on energy approach[J]. Journal of Vibration and Shock, 2016, 35(24): 164-174

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