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

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 fluctuation and uncertainty which cause the suspension K&C characteristic fluctuation bigger compared with the standard K&C characteristic. In view of the uncertainty analysis problem, mathematical models for Mcpherson suspension are built by using the attitude coordinate transformation based on the rigid body kinematics theory. Sobol method is used to analyze the suspension K&C characteristics sensitivity and find out the hard point of the impact. The interval analysis method is used to optimize parameters of the suspension structure which will improve the suspension K&C characteristic robustness and reduce the suspension K&C fluctuation compared with the standard K&C characteristic. The results show that this method has high robustness and practicability