基于全轮纵向力优化分配的4WD车辆直接横摆力矩控制  

4WD Vehicle DYC Based on Tire Longitudinal Forces Optimization Distribution

作　　者：邹广才[1] 罗禹贡[2] 李克强[2] 

机构地区：[1]北京汽车研究总院,北京100021 [2]青华大学汽车安全与节能国家重点实验室,北京100084

出　　处：《农业机械学报》2009年第5期1-6,共6页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家“863”高技术研究发展计划资助项目(2006AA11Z217)

摘　　要：为了充分利用四轮独立驱动(4WD)与直接横摆力矩控制(DYC)各自的优势,提出了基于全轮纵向力优化分配的4WD车辆DYC系统方案。利用改进的2DOF车辆模型制定DYC稳定性控制目标,设计基于最优动态滑模的"前馈+反馈"DYC控制器。建立全轮纵向力优化分配模式,结合HSRI轮胎模型设计了降低整车路面附着负荷的目标函数,并通过约束优化得出全轮纵向力分配值。研究表明,全轮纵向力优化分配可提高整车路面附着余量,进一步提升了DYC系统的控制性能。A new 4WD vehicle DYC system based on the tire longitudinal forces optimization distribution was proposed to combine the advantages of DYC and the independent four-wheel-drive chassis. The modified 2DOF vehicle model was utilized to obtain the DYC target for vehicle stability. The ＂feedforward ＋ feedback＂ DYC controller was designed with the optimal dynamical sliding mode. The tire longitudinal forces optimization distribution mode was established with the stability index combining HSRI tire model to increase the vehicle-road grip margin. The index was constraining calculated to obtain tire forces distribution results. The simulation result shows that the remaining part of the vehicle-road adhesion is increased by the optimization distribution under DYC, which means the vehicle stability potential is improved than using the general distribution method, i.e. DYC is enhanced further.

关 键 词：车辆 直接横摆力矩控制 四轮独立驱动 全轮纵向力优化分配 

分 类 号：U27[机械工程—车辆工程]