主办:陕西省汽车工程学会
ISSN 1671-7988  CN 61-1394/TH
创刊:1976年

汽车实用技术 ›› 2023, Vol. 48 ›› Issue (23): 89-94.DOI: 10.16638/j.cnki.1671-7988.2023.023.017

• 测试试验 • 上一篇    

最优控制的汽车半主动悬架权重系数的研究

徐明清,么鸣涛*,李宝玉,李翔宇   

  1. 北京化工大学 机电工程学院
  • 出版日期:2023-12-15 发布日期:2023-12-15
  • 通讯作者: 么鸣涛
  • 作者简介:徐明清(1999-),男,硕士研究生,研究方向为车辆工程,E-mail:1574318463@qq.com。
  • 基金资助:
    中央高校基本科研业务费资助(buctrc202204)

Research on Optimal Control of Automotive Semi-active Suspension Weight Coefficient

XU Mingqing, YAO Mingtao* , LI Baoyu, LI Xiangyu   

  1. College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology
  • Online:2023-12-15 Published:2023-12-15
  • Contact: YAO Mingtao

摘要: 汽车行驶平顺性和操作稳定性与悬架有关参数关联密切。为提高半主动悬架性能,文 章分别建立 1/4 车辆二自由度的被动悬架模型和半主动悬架模型,将二次型最优控制应用在 半主动悬架上。采用 MATLAB 搭建仿真模型,通过调节最优控制中的权重系数,探究在同一 随机路面上半主动悬架的车身垂直加速度、悬架动挠度、轮胎动载荷相对于被动悬架的变化 情况。筛选出合适的权重系数,权重系数在一定变化范围内的半主动悬架的各方面性能优于 被动悬架,并且可以调节其中一项权重系数而使悬架的某一项性能远远高于被动悬架甚至主 动悬架。

关键词: 半主动悬架;车身垂直加速度;悬架动挠度;轮胎动载荷;最优控制

Abstract: The car ride comfort and operation stability are closely related to the suspension parameters. In order to improve the performance of semi-active suspension, the passive suspension model and semi-active suspension model of 1/4 vehicle with two degrees of freedom are established respectively in this paper, and the quadratic optimal control is applied to the semi-active suspension. MATLAB is used to build a simulation model. By adjusting the weight coefficient in the optimal control, the changes of the body vertical acceleration, suspension dynamic deflection and tire dynamic load of the semi-active suspension on the same random road surface are explored relative to the passive suspension. The appropriate weight coefficient is selected, and the performance of the semi-active suspension is better than that of the passive suspension in all aspects when the weight coefficient is within the range of its variation, and one of the weight coefficients can be adjusted so that the performance of one of the suspension is much higher than that of the passive suspension or even the active suspension.

Key words: Semi-active suspension; Body vertical acceleration; Suspension dynamic deflection; Tire dynamic load; Optimal control