Identification of Tire Force and Moment (F&M) Characteristics That Improve Combined Slip Handling Performance

IF 0.9 Q4 ENGINEERING, MECHANICAL
T. Wei, H. Dorfi
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引用次数: 1

Abstract

Since tires generate the control forces required for the operation of a vehicle, the tire force and moment (F&M) characteristics have to be designed such that the vehicle can easily be kept under driver control under many driving conditions. However, the relationship between F&M characteristics and vehicle handling performance is not well understood for many driving maneuvers. A better understanding of this relationship would thus provide insight into how to improve the matching between tires and vehicles for increased vehicle stability. Building a large number of tires with different characteristics would be too expensive and time consuming, so an investigation using simulations is preferred. However, one problem with simulations is that handling performance cannot be evaluated by a professional driver (subjective metrics), unlike in outdoor tests. A way of evaluating handling performance in simulation through objective metrics is therefore necessary. In this study, the focus is on vehicle handling performance during simultaneous cornering and braking. Desirable F&M metrics were identified using the following process: Handling simulations were validated using instrumented vehicle measurements of handling behavior at outdoor test facilities. An objective handling metric (peak body slip angle) was identified that has high correlation with professional driver ratings (subjective metric) of combined slip handling performance. The objective metric could therefore be used with simulations to predict the professional driver rating. Many virtual tires were generated by changing F&M characteristics of Pacejka tire models. These virtual tires were used in simulations of combined slip handling maneuvers and evaluated for performance using the objective handling metric. By identifying which changes to F&M metrics had high correlation to changes in handling performance, the primary influencing characteristics were determined. These results were also confirmed by looking at the correlation between F&M metrics of actual tires and their subjective ratings.
提高轮滑处理性能的轮胎力和力矩特性识别
由于轮胎产生车辆运行所需的控制力,因此必须设计轮胎力和力矩(F&M)特性,以便在许多驾驶条件下使车辆易于保持在驾驶员的控制之下。然而,对于许多驾驶操作,F&M特性与车辆操纵性能之间的关系尚未得到很好的理解。因此,更好地理解这种关系将有助于深入了解如何改善轮胎和车辆之间的匹配,从而提高车辆的稳定性。制造大量具有不同特性的轮胎将过于昂贵和耗时,因此使用模拟进行调查是首选。然而,模拟的一个问题是处理性能不能由专业驾驶员评估(主观指标),不像户外测试。因此,需要一种通过客观度量来评估模拟处理性能的方法。在本研究中,重点研究车辆在同时转弯和制动时的操纵性能。通过以下过程确定了理想的F&M指标:在室外测试设施中,使用仪表车辆测量处理行为来验证处理模拟。我们确定了一个客观的处理指标(峰值车身滑移角),它与专业驾驶员对综合滑移处理性能的评价(主观指标)高度相关。因此,客观指标可以与模拟一起用于预测专业驾驶员等级。通过改变Pacejka轮胎模型的F&M特性,生成了多个虚拟轮胎。将这些虚拟轮胎用于组合滑移操纵仿真,并使用客观操纵指标对其性能进行评估。通过确定哪些F&M指标的变化与处理性能的变化高度相关,确定了主要的影响特征。通过观察实际轮胎的F&M指标与其主观评分之间的相关性,也证实了这些结果。
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来源期刊
Tire Science and Technology
Tire Science and Technology ENGINEERING, MECHANICAL-
CiteScore
2.10
自引率
0.00%
发文量
11
期刊介绍: Tire Science and Technology is the world"s leading technical journal dedicated to tires. The Editor publishes original contributions that address the development and application of experimental, analytical, or computational science in which the tire figures prominently. Review papers may also be published. The journal aims to assure its readers authoritative, critically reviewed articles and the authors accessibility of their work in the permanent literature. The journal is published quarterly by the Tire Society, Inc., an Ohio not-for-profit corporation whose objective is to increase and disseminate knowledge of the science and technology of tires.
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