Moog Servo Valve with DDV Closed-Loop Control Design for Dynamic Response Speed and Strong Anti Pollution Ability

Closed-loop control design with dynamic response speed and strong anti-pollution capability.

What is a MOOG Electro-Hydraulic Servo Valve and how does it work?

A MOOG Electro-Hydraulic Servo Valve is an electro-hydraulic conversion and power amplification component. Its primary function is to receive analog electrical control signals and then proportionally adjust the output flow and pressure of hydraulic fluid based on these signals, thereby achieving precise control of hydraulic actuators.

Essentially, it converts tiny electrical signals into high-power hydraulic output, making it a core component in electro-hydraulic servo systems.

Most MOOG servo valves are two-stage valves. In the first stage, an electrical signal is sent to a torque motor, which moves a flapper between two nozzles, creating a pressure differential. This pressure difference acts on a spool (the second stage), moving it to control the main hydraulic flow to the load. The valve may use mechanical feedback (e.g., a spring) or an electrical feedback system (LVDT sensor) to ensure the spool position accurately corresponds to the input command signal.