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讨论了一类电液位置控制系统，它由一个可连续调节流量的小流 量阀和一个开关型的大流量阀并联组成。对其稳定性条件、位置控制性能等进行了分析，并 以比例阀和开关阀并联系统为例，说明此类系统成本低廉，避免运用昂贵的大流量电液伺服 阀，特别适用于那些需要快速定位，定位精度高，并且工作时仅在小范围内需要调整的电液位置控制系统。
A class of electrohydraulic position control system is discussed, which consists of a small flow valve with continuously adjustable flow and a large flow valve with switch. The stability conditions and position control performance are analyzed. The parallel system of proportional valve and on-off valve is taken as an example to show that the system is low cost and avoids using expensive high-flow electro-hydraulic servo valve. It is especially suitable for those who need fast Positioning, positioning accuracy, and work only in a small area need to adjust the electro-hydraulic position control system.