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Vehicle suspension vibration control with magnetorheological dampers.

机译:带有磁流变阻尼器的车辆悬架振动控制。

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摘要

A new analytical model is developed to describe the relationship between the magnetorheological (MR) material shear modulus and the magnetic field by analyzing the dipole interactions of the polarizable particles in the same chain. Also, to represent the hysteretic damping force of a sponge-based MR damper, a Bouc-Wen model is adopted, and the model parameters are identified based on experimental data.; Two analytical methods, the averaging method and the equivalent linearization method, are proposed to analyze the steady-state response of a one degree-of-freedom (1DOF) suspension system with an MR damper and sinusoidal excitations. The analytical results are in good agreement with the numerical simulations and experimental results. Moreover, the effects of the Bouc Wen model parameters on the system responses are explored.; Three semi-active control methods, the limited relative displacement (LRD), the modified skyhook (MSK), and the modified Rakheja-Sankar (R-S) control methods are proposed to control the 1DOF suspension system. Their performances are analyzed by the averaging method. When different constant currents are applied to the MR damper, the function of the RMS of the sprung mass acceleration versus its RMS relative displacement is established as a reference to assess the three proposed control methods. The analytical, numerical, and experimental results indicate that the MSK method and the modified R-S method achieve good ride comfort with a low relative displacement. The LRD control method can easily control the relative displacement of the sprung mass to the base, but does not significantly improve the ride comfort.; In addition, a novel load-leveling suspension system is developed. By controlling the damping force, the stiffness and damping ratio of the entire suspension system can be varied. An analysis demonstrates that the load-leveling suspension system provides a wider vibration control bandwidth than traditional suspension systems. The averaging method is used to obtain the approximate analytical response of the system, when it is subjected to sinusoidal excitation. The analytical results are verified with the numerical simulation results. Moreover, the statistical linearization method is employed to obtain the response of the system with random excitation. In this study, the functions of the statistical linearization equation coefficients are deduced. The Monte Carlo simulation method is adopted to obtain the numerical simulation results. (Abstract shortened by UMI.)
机译:通过分析同一链中可极化颗粒的偶极相互作用,开发了一种新的分析模型来描述磁流变(MR)材料的剪切模量与磁场之间的关系。另外,为了表示海绵基MR阻尼器的滞后阻尼力,采用了Bouc-Wen模型,并根据实验数据确定了模型参数。提出了两种分析方法:平均法和等效线性化法,以分析带有MR阻尼器和正弦激励的一自由度(1DOF)悬架系统的稳态响应。分析结果与数值模拟和实验结果吻合良好。此外,还探讨了Bouc Wen模型参数对系统响应的影响。提出了三种半主动控制方法,即有限相对位移(LRD),改进的天钩(MSK)和改进的Rakheja-Sankar(R-S)控制方法来控制1DOF悬架系统。通过平均法分析其性能。当将不同的恒定电流施加到MR阻尼器时,弹簧质量加速度的RMS相对于RMS相对位移的函数将作为评估三种建议控制方法的参考。分析,数值和实验结果表明,MSK方法和改进的R-S方法可实现良好的乘坐舒适性,并且相对位移较小。 LRD控制方法可以容易地控制簧载质量相对于基座的相对位移,但不会显着提高乘坐舒适性。另外,开发了新颖的载荷平衡悬架系统。通过控制阻尼力,可以改变整个悬架系统的刚度和阻尼比。分析表明,负载均衡悬架系统比传统悬架系统提供了更宽的振动控制带宽。当系统受到正弦激励时,使用平均方法获得系统的近似分析响应。数值模拟结果验证了分析结果。此外,采用统计线性化方法来获得系统的随机激励响应。在这项研究中,推导了统计线性化方程系数的函数。采用蒙特卡罗模拟方法获得数值模拟结果。 (摘要由UMI缩短。)

著录项

  • 作者

    Shen, Yu.;

  • 作者单位

    University of Waterloo (Canada).;

  • 授予单位 University of Waterloo (Canada).;
  • 学科 Engineering Mechanical.
  • 学位 Ph.D.
  • 年度 2005
  • 页码 170 p.
  • 总页数 170
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 机械、仪表工业;
  • 关键词

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