不同平顺性评价指标对悬架最优阻尼比的影响
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U461

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安徽省新能源暨智能网联汽车创新发展工程专项


Influence of Different Ride Comfort Evaluation Metrics on the Optimal Suspension Damping Ratio
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    摘要:

    为研究不同汽车平顺性评价指标对悬架最优阻尼比的影响,以1/4汽车悬架线性模型为研究对象,采用MATLAB/Simulink软件建立路面不平度时域模型及悬架二自由度模型。首先仿真验证路面不平度时域模型的准确性;接着分别采用加速度均方根值和频率加权加速度均方根值作为平顺性评价指标计算最优阻尼比并进行比较,研究表明考虑加权作为评价指标的最优阻尼比小于未考虑加权作为评价指标的最优阻尼比,且两个评价指标下的最优阻尼比均与路面等级和车速无关;最后提出了同时考虑加权加速度均方根值、动挠度均方根值、车轮动载均方根值的综合平顺性评价指标,研究了基于该指标下不同路面不同车速的最优阻尼比,结果表明,采用综合平顺性评价指标时的最优阻尼比与路面等级和车速相关。研究结论为车辆悬架阻尼优化及控制提供了依据。

    Abstract:

    The influence of different ride comfort evaluation metrics on the optimal damping ratio of vehicle suspension system is studied. Based on the linear theory of quarter vehicle suspension system, a time domain model of road roughness and a 2 degree-of-freedom (DOF) suspension-tire model are established using Matlab/Simulink. The accuracy of the road model is simulated and verified first. Vehicle-Body acceleration root mean square (RMS) with and without frequency weighting is used as evaluation metrics to calculate the optimal damping ratio. A comparison of the above-mentioned results indicates that the optimal damping ratio calculated with frequency weighting is smaller than that without frequency weighting. It is also noted that the optimal damping ratio is independent from road grades and vehicle speeds. Finally, a comprehensive evaluation metrics considering the factors of the vehicle-body acceleration, the suspension dynamic deformation and the wheel dynamic load is proposed. Analysis result utilizing the newly proposed metrics indicates that the optimal damping ratio is dependent on road grades and vehicle speeds. This paper provides a basis for vehicle suspension damping optimization and control.

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戴振泳,李 涛,宋廷伦,等. 不同平顺性评价指标对悬架最优阻尼比的影响[J]. 科学技术与工程, 2020, 20(21): 8798-8803.
DAI Zhen-yong. Influence of Different Ride Comfort Evaluation Metrics on the Optimal Suspension Damping Ratio[J]. Science Technology and Engineering,2020,20(21):8798-8803.

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历史
  • 收稿日期:2019-10-08
  • 最后修改日期:2020-05-27
  • 录用日期:2019-12-27
  • 在线发布日期: 2020-08-18
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