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特性相对于标准K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特性相对于标准K特性波动减小,进而提高悬架K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 e r o r, the actual hard point has certain fluctua-tion and uncertainty which cause the suspension K characteristic fluctuation bigger compared witli the standard K characteristic. In view of the uncertainty analysis problem, mathematical models for Mcpherson by using the attitude coordinate transformation based on the rigid body kinematics theory; Sobol method is used toanalysis the suspension K characteristics sensitivity and find out t!ie hard point of impact; interval analysis met!iodis to optimize parameters of suspension structure which will improve the suspension K characteristic robustnes andreduce the suspension K fluctuation compared wit!i the standard K characteristic. T he results has high robustness and practicability.
出处
《科学技术与工程》
北大核心
2017年第28期137-143,共7页
Science Technology and Engineering
基金
国家科技支撑计划(2015BAG17B00)资助
关键词
区间分析
不确定性
Sobol法
灵敏度分析
interval analysis uncertainty problem Sobol method sensitivity analysis
