基于路面时域模型的克里斯蒂悬架设计与优化  

Design and optimization of christie suspension based on road surface time-domain Model

作　　者：何金洲 HE Jinzhou(Chongqing Changan Industrial Group Co.,Ltd.,Chongqing 401120,China)

机构地区：[1]重庆长安工业集团有限责任公司,重庆401120

出　　处：《农业装备与车辆工程》2024年第9期73-77,共5页Agricultural Equipment & Vehicle Engineering

摘　　要：为解决在较差路面越野工况下悬架动挠度过大和克里斯蒂悬架占用空间较大的问题,需对该悬架进行阻尼比匹配与硬点优化。基于此,设计确定悬架主要参数后采用Simulink滤波白噪声方法建立路面时域模型,以此为输入分析不同阻尼比下的车身加速度与悬架位移变化情况,确定悬架系统的最佳阻尼比;基于悬架参数选用满足条件的弹簧减振器,以弹簧减振器安装尺寸及车身安装点、车身离地间隙等作为约束条件,运用MATLAB非线性规划方法优化悬挂硬点布置。结果表明,所设计的悬架系统在越野工况下撞击限位概率明显降低,结构更为紧凑,为底盘电子元器件节省出布置空间。To address the issues of excessive suspension deflection under poor road off-road conditions and large space occupation by the Christie suspension,it was necessary to carry out damping ratio matching and hard point optimization for the suspension.Based on this,after determining the main parameters of the suspension,a road time-domain model was established using the Simulink filtering white noise method,and this was used as input to analyze the changes in body acceleration and suspension displacement under different damping ratios,to determine the optimal damping ratio value of the suspension system;based on the suspension parameters,a spring shock absorber that meets the conditions was selected,and the installation size of the spring shock absorber and the car body mounting points,as well as the ground clearance of the car body,were used as constraints,and the hard point layout of the suspension was optimized using the MATLAB nonlinear programming method.The results showed that the designed suspension system had significantly reduced the probability of impact limit under off-road conditions,the structure was more compact,and space for the layout of chassis electronic components had saved.

关 键 词：路面不平度 路面时域模型 阻尼匹配 非线性规划 克里斯蒂悬架 

分 类 号：U463.33[机械工程—车辆工程]