scholarly journals Construction and Numerical Realization of a Magnetization Model for a Magnetostrictive Actuator Based on a Free Energy Hysteresis Model

2019 ◽  
Vol 9 (18) ◽  
pp. 3691
Author(s):  
Zhen Yu ◽  
Chen-yang Zhang ◽  
Jing-xian Yu ◽  
Zhang Dang ◽  
Min Zhou
Keyword(s):  
Free Energy ◽  
High Reliability ◽  
Large Strain ◽  
Mechanical Strain ◽  
Engineering Application ◽  
Numerical Realization ◽  
Hysteresis Model ◽  
Magnetostrictive Material ◽  
Giant Magnetostrictive Material ◽  
Magnetostrictive Actuators

Giant magnetostrictive actuators (GMA) driven by giant magnetostrictive material (GMM) has some advantages such as a large strain, high precision, large driving force, fast response, high reliability, and so on, and it has become the research hotspot in the field of microdrives. Research shows there is a nonlinear, intrinsic relationship between the output signal and the input signal of giant magnetostrictive actuators because of the strong coupling characteristics between the machine, electromagnetic field, and heat. It is very complicated to construct its nonlinear eigenmodel, and it is the basis of the practical process of giant magnetostrictive material to construct its nonlinear eigenmodel. Aiming at the design of giant magnetostrictive actuators, the magnetization model based on a free-energy hysteresis model has been deeply researched, constructed, and put forward by Smith, which combines Helmholtz–Gibbs free energy and statistical distribution theory, to simulate the hysteresis model at medium or high driving strengths. Its main input and output parameters include magnetic field strength, magnetization, and mechanical strain. Then, numerical realization and verification of the magnetization model are done by the Gauss–Legendre integral discretization method. The results show that the magnetization model and its numerical method are correct, and the research results provide a theoretical basis for the engineering application of giant magnetostrictive material and optimized structure of giant magnetostrictive material actuators, which have an important practical application value.

Research on Heat Compensation Control of Giant Magnetostrictive Material in the Micro Feed

2013 ◽  
Vol 579-580 ◽  
pp. 186-191
Author(s):  
Bai Ning Chen ◽  
Feng Chen ◽  
Xu Li
Keyword(s):  
Control Method ◽  
Cooling System ◽  
Cooling Water ◽  
Single Chip ◽  
Magnetostrictive Material ◽  
Output Displacement ◽  
Compensation Control ◽  
Giant Magnetostrictive Material ◽  
Magnetostrictive Actuators ◽  
The Impact

This paper present a Giant Magnetostrictive Actuators (GMA) which used magnetostrictive characteristics of Giant Magnetostrictive Material (GMM) and is applied on Micro displacement of precision instrument. Since GMM is influenced by temperature and the electrified coils generating magnetic field are the main sources of heat in GMA, so the temperature impacts factors on the output displacement of magnetostrictive material are analyzed firstly, and also a control method based on existing magnetostrictive actuators is redesigned, while model is established according to the relation between output displacement and voltage values. Finally a solution is proposed about heat compensation control in GMA, and also adds a water cooling system to the cavity of GMA and controls the temperature of cooling water by Single Chip Microcomputer (SCM) according to the detected temperature of magnetostrictiverod; therefore compensations for the GMAs feed displacement are allocated. Displacement closed-looped PID controls are used to tests, which can proves that the heat compensation control system of GMA can lower the impact of increasing temperature on GMMs magnetostriction coefficient and increase positioning accuracy.

New Dynamic Jiles-Atherton Hysteresis Model for Giant Magnetostrictive Material

2011 ◽  
Vol 474-476 ◽  
pp. 704-708
Author(s):  
Xin Xin Li ◽  
Wei Zhou
Keyword(s):  
Eddy Current ◽  
Hysteresis Model ◽  
Magnetostrictive Material ◽  
Dynamic Hysteresis ◽  
Rate Dependent ◽  
Giant Magnetostrictive Material ◽  
Simulation And Experiment ◽  
Effective Magnetic Permeability ◽  
Set Up ◽  
The Relationship

To set-up a rate-dependent dynamic hysteresis model, eddy current loss in giant magnetostrictive material is represented by the loss in eddy current impedance. By combining static Jiles-Atherton hysteresis model, the equivalent circuit of giant magnetostrictive material is built, the relationship between eddy current impedance and magnetic field and magnetization is derived and the maximum eddy current impedance of the material is clculated. Effective magnetic permeability is applied to estimate the eddy current impedance as exciting rate or frequency gets high. Simulation and experiment results of exciting frequencies at 5Hz,10Hz,20Hz, are compared, showing experiment results are coincident with simulation ones, in term of magnitude order and tilt direction. It is demonstrated that effective permeability is feasible for eddy current impedance estimation and eddy current impedance-based dynamic Jiles-Atherton hysteresis model is able to reflect practical dynamic hysteresis.

scholarly journals Optical Fiber Current Sensors Based on FBG and Magnetostrictive Composite Materials

2020 ◽  
Vol 11 (1) ◽  
pp. 161
Author(s):  
Shaoyi Xu ◽  
Qiang Peng ◽  
Chuansheng Li ◽  
Bo Liang ◽  
Junwen Sun ◽  
...  
Keyword(s):  
Composite Materials ◽  
Optical Fiber ◽  
Electromagnetic Interference ◽  
Dynamic Range ◽  
High Reliability ◽  
Magnetostrictive Material ◽  
Magnetostrictive Materials ◽  
Giant Magnetostrictive Material ◽  
Giant Magnetostrictive Materials ◽  
Current Sensors

Optical fiber current sensors are widely used in the online monitoring of a new generation power system because of their high electrical insulation, wide dynamic range, and strong anti-electromagnetic interference ability. Current sensors, based on fiber Bragg grating (FBG) and giant magnetostrictive material, have the advantages of high reliability of FBG and high magnetostrictive coefficient of giant magnetostrictive material, which can meet the monitoring requirements of digital power systems. However, giant magnetostrictive materials are expensive, fragile, and difficult to mold, so giant magnetostrictive composite materials have replaced giant magnetostrictive materials as the sensitive elements of sensors. High sensitivity, high precision, wide working range, low response time, and low-cost optical fiber current sensors based on magnetostrictive composites have become a research hotspot. In this paper, the working principle of the sensor, the structure of the sensor, and the improvement of magnetostrictive composite materials are mainly discussed. At the same time, this paper points out improvements for the sensor.

Design and Experimental Study of the Vibration Control Device for Large Spatial Structure

2011 ◽  
Vol 199-200 ◽  
pp. 1435-1440
Author(s):  
She Liang Wang ◽  
Jian Bo Dai ◽  
Xiang Zhao ◽  
Lu Lu Miao
Keyword(s):  
Spatial Structure ◽  
Vibration Control ◽  
High Efficiency ◽  
High Reliability ◽  
Mechanical Energy ◽  
Control Device ◽  
Driving Voltage ◽  
Force Output ◽  
Magnetostrictive Material ◽  
Giant Magnetostrictive Material

According to active vibration control of the large spatial structure, a vibration control device called giant magnetostrictive material actuator was designed which could convert electromagnetic energy into mechanical energy. This device take giant magnetostrictive material as the core component and make full use of its magnetic properties like big force output, fast response, high reliability and low driving voltage. Then its principle and design method was analyzed, and output performance tests were done. The results show that this device have good magnetic circuit structure, high efficiency of energy conversion, and could output larger force and displacement under the drive current with linear relationship sensitively, and lay a good foundation for its application in the large spatial structure.

scholarly journals Development of a Direct-Drive Servovalve Using a Giant Magnetostrictive Material.

1993 ◽  
Vol 59 (563) ◽  
pp. 2112-2115
Author(s):  
Takahiro Urai ◽  
Takahiro Sugiyama ◽  
Takashi Nakamura ◽  
Katsuhisa Jinbo
Keyword(s):  
Direct Drive ◽  
Magnetostrictive Material ◽  
Giant Magnetostrictive Material

scholarly journals Extraction and Filter Algorithm of Guidance Information for Full-strapdown Seeker on Rotation Missile

2018 ◽  
Vol 214 ◽  
pp. 03008 ◽  
Author(s):  
YongShan Liu ◽  
Li Song ◽  
JingLong Li
Keyword(s):  
Kalman Filter ◽  
Extended Kalman Filter ◽  
Simple Structure ◽  
Unscented Kalman Filter ◽  
High Reliability ◽  
Engineering Application ◽  
Line Of Sight ◽  
Light Weight ◽  
Rate Information ◽  
Guidance Information

Strapdown seekers are superior to platform seekers for their simple structure, high reliability and light weight but cannot measure the line-of-sight angle rate information for the guidance of rotation missile directly. This paper aims at the engineering application of full-strapdown seekers on rotation missile problem. Firstly, a line-of-sight angle rate solution model is established. Based on the MATLAB, the extended Kalman filter (EKF) algorithm and unscented Kalman filter (UKF) algorithm are used to estimate the line-of-sight angle rate information of the full-strapdown seekers. The results show that using EKF filter and UKF filter both can obtain effective guidance information and the UKF’s effect is better.

scholarly journals Crystal plasticity: The Hamilton-Eshelby stress in terms of the metric in the intermediate configuration

2012 ◽  
Vol 39 (1) ◽  
pp. 55-69 ◽  
Author(s):  
Paolo Mariano
Keyword(s):  
Free Energy ◽  
Energy Momentum Tensor ◽  
Large Strain ◽  
Momentum Tensor ◽  
Classical Field ◽  
Field Theories ◽  
Relative Power ◽  
Eshelby Stress ◽  
Classical Field Theories ◽  
Intermediate Configuration

The Hamilton-Eshelby stress is a basic ingredient in the description of the evolution of point, lines and bulk defects in solids. The link between the Hamilton-Eshelby stress and the derivative of the free energy with respect to the material metric in the plasticized intermediate configuration, in large strain regime, is shown here. The result is a modified version of Rosenfeld-Belinfante theorem in classical field theories. The origin of the appearance of the Hamilton-Eshelby stress (the non-inertial part of the energy-momentum tensor) in dissipative setting is also discussed by means of the concept of relative power.

Sign in / Sign up

Export Citation Format

Share Document