车辆半主动悬架阻尼多模式切换控制研究

Damping multi-mode switching control for a vehicle semi-active suspension

为提高车辆行驶平顺性,提出了一种基于阻尼多模式切换减振器的车辆半主动悬架及其控制方法。相较于传统阻尼可调减振器,该新型减振器通过控制两个高速开关电磁阀的通断状态即可实现四种不同的阻尼工作模式,从而使得车辆半主动悬架的阻尼控制更加高效和节能。分析了阻尼多模式切换减振器的基本原理,建立了减振器阻尼特性数学模型。结合车辆悬架系统的阻尼比范围,确定了减振器关键部件参数,并通过仿真获取了四种阻尼工作模式下的减振器复原阻尼系数和压缩阻尼系数。在此基础上,进一步建立了车辆半主动悬架数学模型,采用模糊控制逻辑设计了悬架阻尼多模式切换控制策略。仿真结果表明,相较于传统被动悬架和基于天棚控制的半主动悬架,基于阻尼多模式切换减振器的车辆半主动悬架可以进一步改善车辆行驶平顺性。

In order to improve ride comfort of vehicles,a new vehicle semi-active suspension control method based on a damping multi-mode switching damper was proposed.Compared to traditional dampers with adjustable damping,the new damper could have four different damping modes through controlling on-off statuses of two high-speed switch solenoid valves to make damping control of vehicle semi-active suspension be more efficient and energy-saving.The basic principles of dampers with damping multi-mode switching were analyzed to establish damping features mathematical model of this type damper.The damping ratio range of this type vehicle suspension system was applied to determine parameters of key components of this type damper.The damper’s restoring damping coefficients and compression ones under four damping modes were obtained with simulation to establish the mathematical model of this type vehicle semi-active suspension.The suspension’s damping multi-mode switching control strategy was designed based on the fuzzy control logic.Simulation results showed that compared to traditional passive suspensions and semi-active suspensions based on skyhook control,the vehicle semi-active suspension based on damping multi-mode switching damper can further improve vehicle ride comfort.