摘要
鉴于利用阻尼可调半主动悬架进行侧倾力矩分配控制缺乏完善的理论依据,根据调节阻尼以实现变刚度变阻尼悬架的思路,将磁流变减振器(MRD)半主动悬架视为变刚度变阻尼的悬架系统,无需对结构进行修改。建立了整车转向和悬架综合非线性模型,采用二次非线性轮胎模型以构建转向和悬架的关联,以中性转向为控制目标设计了侧倾力矩分配系数ε的非线性控制器,同时设计了3个模糊控制器以控制车身姿态,并将ε和车身姿态控制相结合,通过解耦运算得到控制4个车轮处磁流变减振器的控制力。仿真结果证实了所提控制策略的有效性。进行侧倾力矩分配控制的MRD半主动悬架不仅实现了良好的操纵稳定性,同时也保持了较好的平顺性。
In view of that using semi-active suspension with tunable damping to lullill rolling moment distri-bution control lacks theoretical basis,the semi-active suspension with magneto-rheological damper （MRD） is regarded as a suspension system with variable stiffness and damping based on the idea of implementing a suspension with variable stiffness and damping by adjusting damping without structural modification. A comprehensive nonlinear model for the steering and suspension ol vehicle is set up,in which a quadratic nonlinear tire model is adopted to construct the correlation between steering and suspension,and a nonlinear controller of roll moment distribution coefficient ε is designed with neutral steer as control objective. Meanwhile three fuzzy controllers are also designed to control the attitude of vehicle body,which is then combined with coefficient ε ,and the control forces for controlling MRDs on four wheels are obtained by decoupling calculation. The results of simulation verify the effectiveness of the control strategy proposed. The roll moment distribution control of MRD semi-active suspension not only achieves good handling stability,but also maintains a better ride comfort of vehicle.
出处
《汽车工程》
EI
CSCD
北大核心
2016年第8期974-980,988,共8页
Automotive Engineering
基金
江苏省"六大人才高峰"高层次人才选拔培养对象项目(2015-JXQC-005)
江苏省高校优秀中青年教师和校长境外研修计划(2012)资助
关键词
半主动悬架
磁流变减振器
侧向稳定性
变刚度变阻尼
侧倾力矩分配
semi-active suspension
magneto-rheological damper
lateral stability
variable stiffness and damping
roll moment distribution
