Hydraulics and Pneumatics: Unit III: Hydraulic Circuits and Systems
electrohydraulic servo system
Construction, Operation
Fig.8.26 illustrates a circuit that uses a closed-loop electrohydraulic servo control system.
ELECTROHYDRAULIC SERVO SYSTEM Fig.8.26 illustrates a circuit that uses a closed-loop electrohydraulic servo control system. This circuit is very much similar to the open loop hydraulic circuit except that a servo valve replaces the flow control and directional valves. In this servo system, a feedback device which is attached to the hydraulic actuator senses the actuator position or speed and transmits a corresponding electrical signal to the servo valve. This feedback signal is compared with electrical input signal. Suppose the actuator position or speed is not that intended, then the electronic summer will generate an error signal. This error signal is amplified and fed to the torque motor to correct the difference. Therefore electrohydraulic servo valves can provide very accurate control relative to position, speed, pressure and load by incorporating the appropriate feedback devices.1. Construction
2. Operation
Hydraulics and Pneumatics: Unit III: Hydraulic Circuits and Systems : Tag: : Construction, Operation - electrohydraulic servo system
Hydraulics and Pneumatics: Unit III: Hydraulic Circuits and Systems
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Hydraulics and Pneumatics
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