Modeling and Parameter Identification of the Vibration Characteristics of Armature Assembly in a Torque Motor of Hydraulic Servo Valves under Electromagnetic Excitations

The resonance of the armature assembly is the main problem leading to the fatigue of the spring pipe in a torque motor of hydraulic servo valves, which can cause the failure of servo valves. To predict the vibration characteristics of the armature assembly, this paper focuses on the mathematical mod...

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Bibliographic Details
Published in:Advances in Mechanical Engineering 2014-01, Vol.6, p.247384
Main Authors: Peng, Jinghui, Li, Songjing, Fan, Yongbo
Format: Article
Language:English
Subjects:
Assembly
Finite element analysis
Fluid flow
Hydraulics
Mathematical models
Motor armatures
Servomechanisms
Simulation
Studies
Valves
Vibration
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Summary:The resonance of the armature assembly is the main problem leading to the fatigue of the spring pipe in a torque motor of hydraulic servo valves, which can cause the failure of servo valves. To predict the vibration characteristics of the armature assembly, this paper focuses on the mathematical modeling of the vibration characteristics of armature assembly in a hydraulic servo valve and the identification of parameters in the models. To build models more accurately, the effect of the magnetic spring is taken into account. Vibration modal analysis is performed to obtain the mode shapes and natural frequencies, which are necessary to implement the identification of damping ratios in the mathematical models. Based on the mathematical models for the vibration characteristics, the harmonic responses of the armature assembly are analyzed using the finite element method and measured under electromagnetic excitations. The simulation results agree well with the experimental studies.
ISSN:1687-8132
1687-8140
1687-8140
1687-8132
DOI:10.1155/2014/247384