Parameter Identification of Displacement Model for Giant Magnetostrictive Actuator

2011 ◽  
Vol 47 (15) ◽  
pp. 115 ◽  
Author(s):  
Huifang LIU
Keyword(s):  
Parameter Identification ◽  
Magnetostrictive Actuator ◽  
Displacement Model

The Design of Giant Magnetostrictive Flow Valve and its COMSOL Simulation

2010 ◽  
Vol 160-162 ◽  
pp. 1146-1150 ◽  
Author(s):  
Pei Chen ◽  
Quan Guo Lu ◽  
Ding Fang Chen ◽  
Kun Chen
Keyword(s):  
Fast Response ◽  
Flow Displacement ◽  
Magnetostrictive Strain ◽  
Valve Opening ◽  
Magnetostrictive Actuator ◽  
Comsol Simulation ◽  
Displacement Model ◽  
Large Flow ◽  
Pilot Valve ◽  
Flow Valve

By combining magnetostrictive actuator with flow valve directly, the flow was precisely controlled due to magnetic materials’ properties of fast response (less than 1μs)and large magnetostrictive strain (up to 1500ppm). The structure was designed based on this theory, and the flow - displacement model of valve was established by analyzing the size of the valve opening in different incentive current. The flow field was analyzed through multi-physics analysis software COMSOL. Simulation results showed that, the continuous adjustment and precision control were realized in a certain range of flow in the valve. Therefore, it could not only adjust the flow in micro amount directly, but also can be a pilot valve for high frequency precision large flow valve.

Displacement model of the giant magnetostrictive actuator with strong bias magnetic field at low frequency

2016 ◽  
Vol 230 (19) ◽  
pp. 3568-3574
Author(s):  
Xue Guangming ◽  
Zhang Peilin ◽  
He Zhongbo ◽  
Li Dongwei ◽  
Yang Zhaoshu ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Low Frequency ◽  
Experimental System ◽  
Bias Field ◽  
Bias Magnetic Field ◽  
Exciting Frequency ◽  
Magnetostrictive Actuator ◽  
Mass Spring ◽  
Displacement Model ◽  
The Relationship

A giant magnetostrictive actuator is designed with strong bias magnetic field. The influence of the strong bias field is introduced, and the corresponding exciting input signal is selected. Magnetic reluctance estimation, approximate linearity between the strain and magnetic field, and a mass–spring–damper system assumption are employed to analyze the actuator’s displacement with low-frequency signal input. An experimental system is designed, and properties of the proposed actuator are tested. With the help of square wave test, appropriate direction of exciting signal for the magnetostrictive actuator is determined. With the help of sinusoidal wave test, the established model is validated and the relationship between the maximum value of the displacement and of the current is analyzed. With exciting frequency lower than 200 Hz, the errors between the calculating and testing results are within 1.0 m, which validates the model.

Online parameter identification of a giant magnetostrictive actuator based on the dynamic Jiles–Atherton model

RSC Advances ◽  
2016 ◽  
Vol 6 (115) ◽  
pp. 114208-114218
Author(s):  
Ce Rong ◽  
Zhongbo He ◽  
Dongwei Li ◽  
Guangming Xue ◽  
Zhaoshu Yang
Keyword(s):  
Parameter Identification ◽  
Dynamic Model ◽  
Online Identification ◽  
Hysteresis Nonlinearity ◽  
Magnetostrictive Actuators ◽  
Magnetostrictive Actuator

Giant magnetostrictive actuators (GMAs) suffer dominant hysteresis nonlinearity. To better predict its output, a dynamic model of GMA based on J–A model is established. Results show the system performs well and is fit for online identification.

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