摘要
为提高车辆行驶平顺性及燃油经济性,本文主要对闭环式电控空气悬架系统控制策略进行研究。介绍了闭环式电控空气悬架系统的工作原理,利用Matlab/Simulink构建闭环式电控空气悬架系统整车动力学模型和Stateflow开发车身高度控制策略。对空气弹簧进行合理地充气和放气,在三种不同位置实现车身高度的实时调节。同时为验证所建闭环式电控空气悬架整车动力学模型的正确性及其控制策略的有效性,对其进行离线和硬件在环仿真。实验结果表明,在自动模式下,空气弹簧能够根据车速自动选择充放气,使车身达到合适的高度位置。在手动模式下,驾驶员能够自主设定悬架位置,从而提高了车辆行驶平顺性和燃油经济性;在两种模式下仿真结果相比,车身高度变化量总体趋势接近,验证了所开发控制策略的有效性。该研究对车辆行驶平顺性及燃油经济性的提高具有重要意义。
In order to improve vehicle ride comfort and fuel economy,this paper mainly studies the control strategy of closed-loop electronic control air suspension system.The working principle of the closed-loop electronically controlled air suspension system is introduced.The vehicle dynamic model of the closed-loop electronically controlled air suspension system is constructed by using Matlab/Simulink,and the body height control strategy is developed by Stateflow.The air spring is inflated and deflated reasonably to realize the real-time adjustment of body height in three different positions.At the same time,in order to verify the correctness of the vehicle dynamics model and the effectiveness of the control strategy,off-line and hardware-in-the-loop simulation are carried out.The experimental results show that,in the automatic mode,the air spring can automatically select the charging and discharging according to the vehicle speed to make the body reach the appropriate height position.In the manual mode,the driver can set the suspension position independently,which improves the ride comfort and fuel economy of the vehicle;In comparison of the simulation results in the two modes,the overall trend of the body height change is similar,which verifies the effectiveness of the control strategy developed.The research is of great significance to the improvement of vehicle ride comfort and fuel economy.
作者
张旗
严天一
赵燕乐
ZHANG Qi;YAN Tianyi;ZHAO Yanle(College of Mechanical and Electrical Engineering,Qingdao University,Qingdao 266071,China)
出处
《青岛大学学报（工程技术版）》
CAS
2021年第1期47-53,共7页
Journal of Qingdao University(Engineering & Technology Edition)
基金
山东省自然科学基金面上项目(ZR2016EEM49)。
关键词
闭环式电控空气悬架
控制策略
电子控制单元
硬件在环仿真
closed loop electronically controlled air suspension
control strategy
electronic control unit
hardware-in-the-loop simulation
