Two design strategies that three-way valve control unsymmetrical cylinder and four way valve control symmetrical cylinder were analyzed from principle and system structure aspects.

• 摘要对船用舵机泵控系统中位置控制单元的三通阀控制非时称缸和四通阀控制对称缸的两种设计方案进行了理论分析和系统结构分析。