Modeling to Predict Rollover Threat of Tractor-Semitrailers
Modeling to Predict Rollover Threat of Tractor-Semitrailers
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DOI：
10.1076/vesd.39.6.401.14596
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发表时间：
2003-06
影响因子：
3.6
通讯作者：
D. Hyun;R. Langari
中科院分区：
文献类型：
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作者：
D. Hyun;R. Langari
摘要提出了一种用于确定牵引车-半挂车翻车威胁指数的预测模型。该模型的目的是在实际事件之前充分预测翻车威胁，从而使驾驶员能够做出相应的反应。预测模型是使用车辆弹簧和未弹簧质量的简单滚动面模型，并结合在线车辆参数识别建立的。使用该预测模型，可以将预测的挂车车轴的载荷转移比(LTR)确定为侧翻威胁指标。用一个12自由度的车辆模型对所提出的预测模型和参数辨识算法进行了验证。结果表明，辨识出的参数值与详细仿真研究中使用的实际参数值较为接近。类似地，LTR值的预测值接近于模拟值，因此该方法有可能作为滚翻威胁评估的基础。
Summary A predictive model to determine a rollover threat index associated with tractor-semitrailers is proposed. The purpose of this model is to predict the rollover threat sufficiently in advance of the actual event so as to enable the driver to react accordingly. The predictive model is established using simple roll-plane models of the vehicle sprung and unsprung masses in conjunction with online vehicle parameter identification. Using this predictive model, the predicted Load Transfer Ratio (LTR) for the trailer axle can be determined as the rollover threat index. The proposed predictive model and the associated parameter-identification algorithm are verified using a 12-degree-of-freedom vehicle model. It is shown that the identified parameter values are close to the actual ones used in detailed simulation study. Similarly it is shown that the predicted values of the LTR are close to the simulated ones, and hence the proposed approach is potentially suitable as the basis for application in rollover threat assessment.