麦式独立悬架运动学分析与优化

利用空间机构运动学和数值计算的方法对麦式独立悬架进行运动学分析 ,并对导向机构结构参数和转向梯形断开点位置进行了优化设计 .结果表明 ,该算法使悬架的设计更为精确、清晰 ,提高了工作效率 ;优化后 ,改善了悬架系统的运动学特性 .

双横臂独立悬架运动学分析与优化设计

首先,针对双横臂悬架特性,采用空间机构运动学理论,对悬架导向机构与转向梯形机构进行运动学分析,然后,利用Matlab编程,实现了从初始坐标输入——悬架系统运动学计算——轮胎定位参数判断——悬架系统的支点位置优化设计的功能.最后,针对某车型悬架系统进行设计计算,优化了悬架支点位置,优化后的轮胎定位参数均达到良好的变化趋势.

汽车转向梯形断开点位置的优化设计

应用空间机构运动学的原理,采用Matlab编制转向梯形断开点的通用优化计算程序,确定汽车转向梯形断开点的最佳位置,从而将悬架导向机构与转向杆系的运动干涉减至最小,为双横臂式独立悬架转向梯形设计提供了精确适用的方法.

KINEMATICAL CLASSIFICATION OF GEARING TYPES AND PROOF OF TWO THEOREMS OF GEARING

The equations determining a resultant screw of two given screws are applied to the studies on gearing and meshing theories. A kinematical classification is proposed and meanwhile proof is given to the First Theorem of Gearing and Willis Theorem.

Mobility and constant-orientation workspace analysis of 4UPS-UPU parallel mechanism

One of the key issues for parallel mechanism is the kinematic characteristics,especially the workspace which varies with configuration parameters.A kind of 4UPS-UPU parallel mechanism is designed and its workspace is studied in this paper.First,the mobility of the 4UPS-UPU parallel mechanism is analyzed based on the reciprocal screw theory,and the motion and constraint screw systems of the parallel mechanism are obtained.Then the inverse kinematics is derived by the closed-form kinematics chain.The boundary search method in the polar coordinate system is presented to analyze the constant-orientation workspace of the parallel mechanism.Finally,the influence factors relevant to the workspace,such as the structural parameters and kinematics parameters are analyzed in detail.The relationship between the workspace volume and different parameters are obtained.The conclusions can be used for parameters optimization and path planning of the parallel mechanism.