Simulation Model and Experimental Verification of Electro-Hydraulic Servo Valve

Abstract:

Structure and working principle of the two-stage moving coil electro-hydraulic servo valve has been analyzed. Through Laplace transformation to get the transfer function by the dynamic equations of the moving coil force motor, the displacement and current double closed loop control to simulate the force output characteristics, ignoring the electromagnet and valve clearance of hysteresis effect, the simulation model was established based on AMESim. The main simulation parameters was determined by the means of measuring and calculating, the control parameters of the pilot spool and the main spool were optimized based on the step response. Inputting the same multiple superimposed sine excitation signal to the physical prototype and simulation models, comparing the simulation and experimental results in the time domain and frequency domain, the correctness of simulation model was proved.

• Periodical: Applied Mechanics and Materials (Volume 328)
• Pages: 473-479
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.328.473
• Online since: June 2013
• Authors: Xiao Fang Ruan
• Keywords: AMESim Model, Electro-Hydraulic, Experimental Verification, Servo Valve

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