液力缓速器放液支路先导比例电磁阀瞬态特性优化

为改进液力缓速器充液率控制系统的瞬态响应特性，建立放液支路比例电磁阀动力学模型并进行实验验证，采用最优欧拉超立方设计方法对典型参数进行敏感度分析，获得比例电磁阀典型参数对输出压力特性的影响规律.结果表明，对于比例电磁阀的压力超调特性，阀芯直径影响最为显著，随后是等效质量和预紧力的交叉项，分析结果对比例电磁阀输出特性的实验校核与加工过程中的零件精度控制具有一定的指导意义.据此采用多目标遗传算法对参数进行优化并获得对应的Pareto前沿优化解集，所选的多目标优化设计点输出压力特性与初始设计点相比，在比例电磁阀响应时间基本不变的情况下，输出压力超调大幅下降，最大降幅达72%，有效改善了液力缓速器放液支路先导比例电磁阀瞬态压力调节特性. 

Transient Characteristics Optimal Design of Proportional Solenoid Valve for Hydrodynamic Retarder Discharge Branch

In order to improve the transient response performance in liquid filling rate control of hydrodynamic retarders,a dynamic model of proportional solenoid valve was established and verified with experiment data.Optimal Euler hypercube DOE method was used to analyze the sensitivity of typical parameters to determine the influence of the valve''s parameters on output pressure characteristics.The results show that the diameter of the spool is most influential to the pressure overshoot of the proportional solenoid valve,and the cross term of equivalent mass and preload come next.The analysis results provide a certain guiding for the proportional solenoid valve''s output characteristic experiment verification and the precision control of the parts in the machining process.Multi-objective genetic algorithm is used to optimize the parameters and obtain corresponding Pareto optimal solution.Compared with initial design point,optimized design point can make the pressure overshoot decreased sharply with a maximum drop of 72% when the response time of proportional solenoid valve remains constant.It can effectively improve the transient pressure control characteristics of the proportional solenoid valve for hydrodynamic retarder.