Servo systems are closed-loop controlsystems. In many industrial applications it is often required to convert smallmechanical motions into a different motions with increased force. Hydraulicsystems are particularly suitable for applications where large actuation forcesare required. The unit allows the operation of a hydraulic servo system tobe investigated in detail. A carriage with a mass of 50kg is moved by ahydraulic cylinder. Additional springs and an adjustable hydraulic damperpermit static and dynamic loads to be simulated. The displacement of thecarriage is established using a potentiometric position sensor and comparedagainst the reference variable. The control deviation is processed in aseparate servo amplifier. Depending on the direction of the deviation, acontrol valve is activated in forward or reverse direction, which in turnproduces a corresponding movement of the hydraulic cylinder and the carriage.
All variables can also be tapped as voltagesignals.