汽车工程 ›› 2023, Vol. 45 ›› Issue (12): 2200-2208.doi: 10.19562/j.chinasae.qcgc.2023.12.002

所属专题: 智能网联汽车技术专题-控制2023年

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线控转向系统转角预测滑模控制算法研究

贺林1,2(),徐子昂1,2,黄春荣1,2,龚超1,李书华1,石琴1   

  1. 1.合肥工业大学汽车与交通工程学院,合肥  230009
    2.合肥工业大学汽车智能与电动实验室,合肥  230009
  • 收稿日期:2023-05-23 修回日期:2023-07-15 出版日期:2023-12-25 发布日期:2023-12-21
  • 通讯作者: 贺林 E-mail:helin@hfut.edu.cn
  • 基金资助:
    江苏省重点研发计划重点项目(BE2021006-2);安徽省新能源汽车暨智能网联汽车产业技术创新工程项目(GXXT-2020-076);汽车仿真与控制国家重点实验室开放基金项目(20201107)

Research on Sliding Mode Control Algorithm for Angle Tracking Prediction of Steer-by-wire System

Lin He1,2(),Ziang Xu1,2,Chunrong Huang1,2,Chao Gong1,Shuhua Li1,Qin Shi1   

  1. 1.School of Automobile and Transportation Engineering,Hefei University of Technology,Hefei  230009
    2.Laboratory of Automobile Intelligence and Electrification,Hefei University of Technology,Hefei  230009
  • Received:2023-05-23 Revised:2023-07-15 Online:2023-12-25 Published:2023-12-21
  • Contact: Lin He E-mail:helin@hfut.edu.cn

摘要:

线控转向是智能底盘的关键技术之一,转角高精度跟踪是线控转向的控制核心目标,基于混合控制理论,本文设计了一种基于扰动转矩观测的转向角跟踪预测滑模控制方法,采用滑模控制作为核心算法,以适配线控转向系统动力学中的非线性特性,采用比例积分观测器估计总扰动转矩并补偿系统的不良影响,采用模型预测控制算法对滑模面参数进行优化,在装配有电机线控转向系统的实验车上对所设计的混合控制方法进行了测试和验证,实验结果表明所设计的预测滑模控制器能够实现较优的转角跟踪性能,以及比例积分观测器可以准确地估计系统总集成扰动转矩。

关键词: 线控转向, 滑模控制, 模型预测控制, PI观测器, 滑模面参数优化, 扰动转矩观测

Abstract:

Steer-by-wire technology is one of the key technologies of intelligent chassis, in which high-precision steering angle following is the core control objective. Based on the hybrid control theory, a disturbance torque estimation-based predictive sliding mode control approach for steering angle following is designed. The sliding mode control is used as the core algorithm to adapt to the nonlinear characteristics of the steer-by-wire system dynamics. A PI observer is used to estimate the total disturbance torque and the adverse effect of the system is compensated. The model predictive control algorithm is used to optimize the sliding manifold parameters. The designed approach is tested and validated in a steering test vehicle equipped with an electric motor steer-by-wire system. The experimental results show that the designed predictive sliding mode controller can realize better angle trajectory following and the PI observer can estimate the lumped disturbance torque accurately.

Key words: steer-by-wire, sliding mode control, model predictive control, PI observer, optimized sliding manifold parameter, disturbance torque estimation