Influence of magnetic fluids on the dynamic characteristics of a hydraulic servo-valve torque motor

摘要

The aim of this paper is to investigate the influence of magnetic fluids on the dynamic characteristics of a hydraulic servo-valve torque motor. As a kind of functional materials, magnetic fluids are filled into the working gaps of a hydraulic servo-valve torque motor in this paper. Forces on the torque motor due to magnetic fluids are studied. The dynamic mathematical models of the torque motor with magnetic fluids are introduced. After that the dynamic characteristics of the torque motor with magnetic fluids are analyzed and tested. Analysis and experimental results are compared with the results when magnetic fluids are not applied in the motor.