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Abstract
The dynamic characteristics analysis about the jet pipe electro-hydraulic servo valve based on experience and mathematical derivation was difficult and not so precise. So we have analysed the armature feedback components, torque motor and jet pipe receiver in electrohydraulic servo valve by sophisticated finite element analysis tools respectively and have got physical meaning data on these parts. Then the data were fitted by Matlab and the mathematical relationships among them were calculated. We have done the dynamic multi-physical fields’ Simulink co-simulation using above mathematical relationship, and have got the input-output relationship of the overall valve, the frequency response and step response. This work can show the actual working condition accurately. At the same time, we have considered the materials and the impact of the critical design dimensions in the finite element analysis process. It provides some new ideas to the overall design of jet pipe electro-hydraulic servo valve.
Highlights
Electro-hydraulic servo valve is used in many modern control systems
Many of the existing products have a lot of problems, for example, the dead zone is too large, poor linearity, connection instability, poor dynamic characteristics etc
We obtained the relationship of the key structures about jet pipe electrohydraulic servo valve by finite element simulation calculation, and summed up the dynamic characteristics of the jet pipe servo valve
Summary
Electro-hydraulic servo valve is used in many modern control systems. Due to the working oil pollution is a major factor that causes the servo valve does not working properly, the anti-pollution ability of the servo valve is very important. This servo valve driven by the pre-stage jet pipe nozzle, and the harm caused by the debris and impurity particles is no too bad, it’s very easy to maintenance management, and its anti-pollution ability is very efficient. The jet pipe electro-hydraulic servo valve which was driven by jet pre-stage has been applied in many prospects, so its characteristics has been put in-depth research. Further study of jet pipe electrohydraulic servo valve is necessary [1]
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