悬架K&C特性响应的参数灵敏度分析及不确定性优化  

Parameter Sensitivity Analysis and Uncertainty Optimization of Suspension K&C Characteristic Response

作　　者：任程远 赵亮[1,2] 郭孔辉[1] 

机构地区：[1]湖南大学汽车车身先进设计制造国家重点实验室,长沙410082 [2]上汽通用五菱股份有限公司,广西柳州545007

出　　处：《机械科学与技术》2017年第5期773-778,共6页Mechanical Science and Technology for Aerospace Engineering

摘　　要：由于零件几何误差、安装误差等存在,使实际硬点的位置具有一定的波动,存在不确定性,导致悬架K&C特性相对于标准K&C特性波动较大。针对该不确定性问题,依据刚体运动学理论应用刚体姿态坐标变换建立麦弗逊悬架数学模型,采用Sobol法对悬架K&C特性进行灵敏度分析,计算出对悬架定位参数影响大的硬点,应用区间分析对悬架结构进行参数优化,使悬架K&C特性相对于标准K&C特性波动减小进而提高悬架K&C的稳健性,结果表明该方法具有较高的稳健性以及工程实用性。Due to the presence of geometric error, installation error, the actual hard point has certain fluctuationand uncertainty which cause the suspension K＆C characteristic fluctuation bigger compared with the standard K＆Ccharacteristic. In view of the uncertainty analysis problem, mathematical models for Mcpherson suspension are builtby using the attitude coordinate transformation based on the rigid body kinematics theory. Sobol method is used toanalyze the suspension K＆C characteristics sensitivity and find out the hard point of the impact. The intervalanalysis method is used to optimize parameters of the suspension structure which will improve the suspension K＆Ccharacteristic robustness and reduce the suspensioncharacteristic. The resultsshow that this method has highK＆C fluctuation compared with the standard K＆Crobustness and practicability.

关 键 词：区间分析 不确定性 Sobol法 灵敏度分析 

分 类 号：U461.1[机械工程—车辆工程]