车辆液压动力转向系统通过伺服阀控制压力油的方向和流量，把转向盘输入的转角信号转变为车轮的偏转角度输出。
Vehicle power steering systems control direction and flow of pressure oil with servo valves, then transfer angular inputs from steering wheels to corner angular outputs of road wheels.
本文利用等效参数建立转向系统的数学模型进行动力学分析，确定转向时压力波动产生的原因和影响因素。
The dynamic analysis of the equivalent model was made, the reason and the impact factors of the pressure fluctuations were found.
着重分析了在阶梯路面上汽车液压动力转向系统在方向盘脱手和未脱手的两种工况下方向盘转角特性、方向盘转矩特性和转向动力缸的压力特性。
The characteristics of steering angle, steering torque and the pressure in cylinder were analyzed when the steering wheel was held or not in the testing.
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