Title :
Study of self-excited noise and pressure oscillations in a hydraulic jet-pipe servo-valve with magnetic fluids
Author :
Li, Hao ; Li, Songjing ; Peng, Jinghui
Author_Institution :
Fluid Control & Autom. Dept., Harbin Inst. of Technol., Harbin, China
Abstract :
In order to overcome self-excited high frequency oscillations and noise appearing sometimes during the working of hydraulic jet-pipe servo-valve, application of magnetic fluid (MF) in hydraulic jet-pipe servo-valve is developed in this paper. Large damping can be introduced into the servo-valve if magnetic fluid is filled into the working gaps of hydraulic servo-valve torque motor. Construction of hydraulic jet-pipe servo-valve with magnetic fluid is introduced. The noise signals are tested and recorded when magnetic fluid is applied or not in the servo-valve. Experimental results are compared and analyzed using FFT analysis. It is shown that noise of servo-valve is depressed when magnetic fluid is applied.
Keywords :
damping; flow control; hydraulic motors; magnetic fluids; oscillations; pressure control; torque control; valves; FFT analysis; damping; fast Fourier transforms; hydraulic jet-pipe servovalve; hydraulic servovalve torque motor; magnetic fluids; pressure oscillation; self-excited noise; Magnetic liquids; Magnetohydrodynamics; Noise; Oscillators; Permanent magnet motors; Saturation magnetization; Torque; jet-pipe servo-valve; magnetic fluids; oscillations; self-excited noise;
Conference_Titel :
Systems and Control in Aeronautics and Astronautics (ISSCAA), 2010 3rd International Symposium on
Conference_Location :
Harbin
Print_ISBN :
978-1-4244-6043-4
Electronic_ISBN :
978-1-4244-7505-6
DOI :
10.1109/ISSCAA.2010.5632306
