负荷传感转向液压系统优先阀的稳健设计

为了实现优先阀的稳健设计，基于解析法及SIMULINK分别建立了优先阀动态数学模型及仿真模型，仿真分析了系统各参数变化对优先阀动态响应特性的影响规律。在分析动态响应特性主要影响因素的基础上，以优先阀转向系统的流量响应超调量最小为设计目标，以优先阀的阀芯直径、弹簧刚度及节流口面积为设计变量，以方向盘角速度、转向负载、工作负载及输出流量为不确定因素，完成了基于损失模型的稳健设计。结果表明，稳健设计提高了设计目标的稳健性，一定程度上提升了优先阀的动态响应特性，该设计方法同样适用于其他阀件的改进设计。

Robust design of priority valve in load sensing hydraulic steering system

The aim of the research is to realize the robust design of priority valve. Based on the analytical method and SIMULINK software, the dynamic mathematical model and simulation model of priority valve were established, and the influence characteristics of system parameters on priority valve dynamic response were analyzed. On basis of analyzing the main influencing factors on dynamic response, the robust design based on loss model was completed, by using the minimum overshoot of priority steering system flow response as the design objective, the valve core diameter, spring stiffness and throttle area as the design variables, the steering wheel angular, steering load, work load and output flow as the uncertain factors. The results show that robust design can improve design objective to a certain extent, the dynamic response characteristic of priority valve is promoted. The design method is also applicable to other valves design improvement.