Title :
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
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;
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.2010.5632507
