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Etude et analyse de la suspension active et semi-active des vehicules routiers.

机译：道路车辆主动和半主动悬架的研究与分析。

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摘要

The objective of this research is to analyze the influence of vibration on the comfort and the stability of the vehicles for the variation of many parameters like the suspensions coefficients, the vehicle velocity, the road irregularities and the seat position. A mathematical model to simulate the dynamic movement of a vehicle has been developed. This model can use nonlinear suspensions such as active and semi-active suspensions. In the second part of this research, a nonlinear seat model has been developed using experimental data. We have exploited this nonlinear seat to give a better explanation of the interface between the driver and the seat.; With a detailed study of the vibration and its effect on the human body, we have concluded that the natural frequency of the human body (1 to 20 Hz) has the same range of the vibration frequency generated by the road irregularities. A temporal profile based on the power spectral density (PSD) has been generated. To justify our mathematical model, we have simulated a quarter car model with passive, active and semi-active suspension. The force generated by the nonlinear suspension is based on the principles of the full state feedback law (fl) and the velocity feedback law (vl). We have showed that the principle vl can be used on the vehicle domain because the energy consumed by it is less than the fl principle and with the vl principle we have only one parameter to control. To complete this analysis, we have developed an optimization method to control the comfort and the stability parameters of the vehicle. Furthermore, with an analytical derivation, we have found the optimal parameters suspensions.; To validate this approach, 2-D and 3-D vehicle models have been analyzed. Results from these models for a random road excitation, a simple bump and a double bump showed that the active and semi-active suspensions increase the comfort level from 30% to 50% compared to the passive suspension. For example, for the 3-D model the comfort increase was in average 30% for the vertical driver acceleration, 30% for the vertical unsprung mass acceleration and 50% for the roll acceleration. However, the pitch acceleration was in the same level for the three suspensions models because we have controlled the pitch movement by introducing specific constraints.; Finally, with the experimental results obtained on the seat at the CONCAVE center of the University of Concordia we have calibrated the numerical seat model. After a comparison between the experimental and the numerical results, we have concluded that the active and the semi-active suspension increases the comfort on the seat by 20% to 30% compared to the conventional one. With this analysis, we have concluded that is better to apply the active and semi-active suspension to the seat because in many cases, like the construction and the mining area, the vehicle drivers are exposed to high amplitude vibrations.
机译：这项研究的目的是分析振动对车辆舒适性和稳定性的影响，这些参数包括悬架系数，车速，道路不平整度和座椅位置等许多参数的变化。已经开发出模拟车辆动态运动的数学模型。该模型可以使用非线性悬架，例如主动和半主动悬架。在本研究的第二部分中，使用实验数据开发了非线性座椅模型。我们已经利用这种非线性座椅来更好地说明驾驶员与座椅之间的界面。通过详细研究振动及其对人体的影响，我们得出结论，人体的固有频率（1至20 Hz）具有与道路不规则产生的振动频率相同的范围。已经生成了基于功率谱密度（PSD）的时间分布图。为了证明我们的数学模型的正确性，我们模拟了具有被动，主动和半主动悬架的四分之一汽车模型。非线性悬架产生的力基于全状态反馈定律（fl）和速度反馈定律（vl）的原理。我们已经证明了原理vl可以在车辆领域使用，因为它消耗的能量小于fl原理，而使用vl原理，我们只有一个参数可以控制。为了完成此分析，我们开发了一种优化方法来控制车辆的舒适性和稳定性参数。此外，通过分析推导，我们发现了最佳参数悬浮。为了验证这种方法，已经分析了2-D和3-D车辆模型。这些模型的随机道路激励，简单颠簸和双重颠簸的结果表明，与被动悬架相比，主动悬架和半主动悬架将舒适度从30％提高到50％。例如，对于3-D模型，垂直方向驾驶员加速度的舒适度平均提高30％，垂直非簧上质量加速度提高30％，侧倾加速度提高50％。但是，三个悬挂模型的俯仰加速度处于同一水平，因为我们通过引入特定约束来控制俯仰运动。最后，根据在康科迪亚大学CONCAVE中心座椅上获得的实验结果，我们校准了数字座椅模型。在对实验结果和数值结果进行比较之后，我们得出结论，主动和半主动悬架与传统悬架相比，可将座椅的舒适度提高20％至30％。通过此分析，我们得出结论，将主动和半主动悬架应用于座椅会更好，因为在许多情况下，例如结构和采矿区域，车辆驾驶员会遭受高振幅的振动。

著录项

  • 作者

    Bouazara, Mohamed.;

  • 作者单位

    Universite Laval (Canada).;

  • 授予单位 Universite Laval (Canada).;
  • 学科 Engineering Mechanical.; Engineering Automotive.
  • 学位 Ph.D.
  • 年度 1997
  • 页码 165 p.
  • 总页数 165
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 机械、仪表工业;自动化技术及设备;
  • 关键词

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