Giant magnetostrictive actuators for active vibration control

TbDyFe is a rare earth-iron magnetostrictive alloy with “giant” magnetostrain, good magnetomechanical coupling factor and fast response. Giant magnetostrictive actuators (GMAs) are designed and fabricated with home-made TbDyFe rods. Their magnetostrain properties under varied operation are tested. The static output displacement up to 100μm and output force up to 1500N were obtained. The dynamic displacement increases with amplitude under fixed frequency and decreases with frequency under fixed amplitude generally. The maximum dynamic output displacement of 146µm was obtained at natural frequency around 5Hz. Active vibration control employing GMA was implemented in the flexible structure. The excellent damping effect, 20-30 dB under the frequency range from 10Hz to 100Hz was obtained. The dynamic phase delay of GMA has been analyzed. A novel improved FSLMS algorithm is proposed to achieve a better control performance.

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A model of magnetostrictive actuators for active vibration control

2011 IEEE International Symposium on Industrial Electronics ◽

10.1109/isie.2011.5984269 ◽

2011 ◽

Cited By ~ 1

Author(s):

Francesco Castelli Dezza ◽

Simone Cinquemani ◽

Marco Mauri ◽

Matteo Maglio ◽

Ferruccio Resta

Keyword(s):

Vibration Control ◽

Active Vibration Control ◽

Magnetostrictive Actuators ◽

Active Vibration

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Load Dependent Hysteresis Model for GMM and its Parameter Identification

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.226-228.2385 ◽

2012 ◽

Vol 226-228 ◽

pp. 2385-2389 ◽

Cited By ~ 2

Author(s):

Guang Hui Chang ◽

Shi Jian Zhu ◽

Jing Jun Lou

Keyword(s):

Vibration Control ◽

Smart Materials ◽

Active Vibration Control ◽

Least Square Method ◽

Least Square ◽

Hysteresis Curve ◽

Model Parameters ◽

Hysteresis Model ◽

Magnetostrictive Actuators ◽

Active Vibration

This paper focuses on the development of load-dependent hysteresis model for Giant magnetostrictive materials (GMM). GMM are a class of smart materials and which are used mostly as actuators for active vibration control. Magnetostrictive actuators can deliver high ouput forces and relatively high displacements. Here, Terfenol-D, a magnetostrictive material is studied. Unlike the hysteresis seen in magnetic materials, The shape of Terfenol-D hysteresis curve changes significantly if the load is changed. To meet performance requirements for active vibration control, an accurate hysteresis model is needed. By modeling the Gibbs energy for each dipole and the equilibrium states, load-dependent hysteresis of GMM is modeled. Then a new PSO-LSM algorithm is brought forward by combing the Particle Swarm Optimization (PSO) with the least square method (LSM).Throughout this algorithm the model parameters were identified. The model results and experimental data were compared at different loads. The simulation results show that the load-dependent hysteresis model optimized by PSO-LSM yields outstanding performance and perfect accuracy.

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On Control of Six Freedom Magnetostrictive Smart Structure

Materials Science Forum ◽

10.4028/www.scientific.net/msf.475-479.2111 ◽

2005 ◽

Vol 475-479 ◽

pp. 2111-2114 ◽

Cited By ~ 2

Author(s):

Jian Qin Mao ◽

Chao Li ◽

Hui Bin Xu ◽

Cheng Bao Jiang ◽

Lin Li

Keyword(s):

Control System ◽

Vibration Control ◽

Real Time ◽

Computer Control ◽

Active Vibration Control ◽

Smart Structure ◽

Computer Control System ◽

Magnetostrictive Actuators ◽

Active Vibration ◽

Six Degree Of Freedom

A six degree-of-freedom (DOF) Stewart platform is constructed, which consists of six TbDyFe alloy magnetostrictive actuators, and applied to active vibration control. To control the smart structure, a real time computer control system is built. An improved adaptive filtering algorithm is proposed in this paper, which is used for the computer control system. The results of experiments show that the smart structure and the proposed algorithm are efficient for active vibration control. More than 30 dB of vibration attenuation is achieved in real-time experiments.

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