Intelligent servo hydraulic device for the control of the motion

Hydraulic servocylinders are electro-hydraulic devices used in automatic control systems to achieve any mechanical parameters-displacement, speed, acceleration, force-precisely. This paper presents a mathematical model and numerical simulation for a servocylinder which contains a double-acting hydraulic cylinder and a servo-valve, with the following parameters: 80 mm tube diameter, 200 bar maximal cylinder pressure and 63 l/min valve flow. The servo-valve is mounted on the cylinder and the built-in electronics allows local "intelligent" features. The described ensemble also contains a displacement transducer, placed on the cylinder rod, which makes this system a positioning mechatronic system. The electronic block allows position control, remote adjustment depending on load and is realized to provide better measurement capability.