Parameter identification of a hydraulic servo-valve torque motor with magnetic fluids based on dynamic characteristics

Author

Xingyuan, Zhang ; Songjing, Li ; Jixiao, Liu

Author_Institution

Dept. of Fluid Control & Autom., Harbin Inst. of Technol., Harbin, China

fYear

2010

fDate

8-10 June 2010

Firstpage

954

Lastpage

957

Abstract

Due to the higher saturation magnetization and magnetoviscosity of magnetic fluids when exposed to a magnetic field, magnetic fluids are filled into the working gaps of a servo-valve torque motor to improve the dynamic performance of the torque motor in this paper. After the construction and working principle of a torque motor with magnetic fluids being introduced, the mathematical models are established. Simulation and experiments on the dynamic characteristics of the torque motor are carried out. Based on the experimental data and the mathematical model of the torque motor with magnetic fluids, the estimated values of the unknown parameters are obtained by a curve-fitting parameter identification method in the least-square sense.

Keywords

curve fitting; hydraulic motors; magnetic fields; magnetic fluids; magnetohydrodynamics; servomotors; torque motors; viscosity; curve-fitting parameter identification method; dynamic characteristics; hydraulic servo-valve torque motor; magnetic field; magnetic fluids; magnetoviscosity; mathematical model; saturation magnetization; Fluid dynamics; Hysteresis motors; Magnetic liquids; Mathematical model; Parameter estimation; Permanent magnet motors; Torque; magnetic fluids; parameter identification; servo-valve; torque motor;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/ISSCAA.2010.5632507

Filename

5632507