Advanced Giant Magnetostrictive Alloys and Application in Actuators for Active Vibration Control

2007 ◽  
Vol 546-549 ◽  
pp. 2143-2150
Author(s):  
Cheng Bao Jiang ◽  
Li Hong Xu ◽  
Tian Li Zhang ◽  
Tian Yu Ma
Keyword(s):  
Vibration Control ◽  
High Performance ◽  
Dynamic Performance ◽  
Active Vibration Control ◽  
Zone Melting ◽  
Improve Performance ◽  
High Electrical Resistivity ◽  
Active Vibration ◽  
Magnetostrictive Actuator ◽  
Giant Magnetostriction

Co and Si were selected as substitutes to improve performance of TbDyFe giant magnetostrictive alloys for special purpose, respectively. The results showed that the Co-doped Tb0.36Dy0.64Fe2 alloys can possess giant magnetostriction over a wide temperature range from -80 to 100 . Optimum magnetostriction, high electrical resistivity and improved corrosion resistance was obtained in Tb0.3Dy0.7(Fe1-xSix)1.95 system. High performance grain-aligned rods with <110> preferred orientation have been successfully prepared by zone melting unidirectional solidification. This paper also presents the design and fabrication of Giant Magnetostrictive Actuator (GMA) for active vibration control with oriented TbDyFe rods. Experimental results showed that the GMA possesses good static and dynamic performance. Excellent damping effect, 20-30 dB under the frequency range from 10 Hz to 120 Hz was obtained.

Giant Magnetostrictive Actuator and Its Application in Active Vibration Control

2005 ◽  
Vol 475-479 ◽  
pp. 2089-2094
Author(s):  
Hui Bin Xu ◽  
Tian Li Zhang ◽  
Cheng Bao Jiang ◽  
Hu Zhang
Keyword(s):  
Vibration Control ◽  
Active Vibration Control ◽  
Fast Response ◽  
Coupling Factor ◽  
Output Displacement ◽  
Output Force ◽  
Magnetostrictive Actuators ◽  
Active Vibration ◽  
Magnetostrictive Actuator ◽  
Static Output

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.

The Dynamic Behavior of High Speed Train Using Magnetorheological Technology on the Curve Track

2015 ◽  
Vol 782 ◽  
pp. 210-218
Author(s):  
Hua Xia Deng ◽  
Lai Jun Zhou ◽  
Shi Yu Zhao ◽  
Wei Hua Li ◽  
Shuai Shuai Sun ◽  
...  
Keyword(s):  
Vibration Control ◽  
High Speed ◽  
Passive Control ◽  
Control Method ◽  
Dynamic Performance ◽  
Active Vibration Control ◽  
High Speed Train ◽  
Active Vibration ◽  
Curve Track ◽  
Turning Radius

The era of high speed railway has come and the most important issue of the high speed train is the safety, which is directly related to billions of families. One of the most serious threats to the safety of the high speed train is the vibration of train body at curve track, which may cause the train off the track. Semi-active vibration control method is a possible solution compared with active control method which has robust problem and passive control method which has efficiency issue. Magnetorheological technology is a typical semi-active vibration control method which has been widely used in the automobile, architectural construction and aerospace. The high speed train using magnetorheological technology has not been fully investigated especially for the dynamic performance at curve track. In this paper, a high-speed train model with MRF dampers is simulated by a combined ADAMS and MATLAB simulation. The dynamic performance of high speed train operating at different speeds and turning radius is investigated to reveal the mechanism of how the MRF damper affects the train’s stability and vibration. The results show that the semi-active suspension installed with MRF dampers substantially improves the stability and dynamic performance of the train at curve track.

Research on the Model of the Magnetostrictive Actuator

2005 ◽  
Vol 475-479 ◽  
pp. 2115-2118
Author(s):  
Lin Li ◽  
Yuanyuan Zhang
Keyword(s):  
Mathematical Model ◽  
Hysteresis Loop ◽  
Vibration Control ◽  
Active Vibration Control ◽  
Alternating Current ◽  
Magnetostrictive Material ◽  
Active Vibration ◽  
Magnetostrictive Actuator

One of the characteristics not to be ignored of the magnetostrictive material used in active vibration control is its hysteresis. In this paper this characteristic has been studied. At first a mathematical model of the hysteresis loop has been obtained on the basis of experiment. This model depends on the frequency and the amplitude of the alternating current inputted to magnetostrictive actuator. Then further modeling of the magnetostrictive actuator has been put forward.

scholarly journals Active Vibration Control of Frame Structures with Smart Structure Using Giant-Magnetostrictive Actuator.

1998 ◽  
Vol 64 (626) ◽  
pp. 3774-3781
Author(s):  
Takafumi FUJITA ◽  
Hajime NONAKA ◽  
Chuen-Shinn YANG ◽  
Hirofumi KONDO ◽  
Yasushi MORI ◽  
...  
Keyword(s):  
Vibration Control ◽  
Active Vibration Control ◽  
Smart Structure ◽  
Frame Structures ◽  
Active Vibration ◽  
Magnetostrictive Actuator

Neural Networks Based Active Vibration Control of Flexible Linkage Mechanisms

2000 ◽  
Vol 123 (2) ◽  
pp. 266-271 ◽  
Author(s):  
Y. M. Song ◽  
C. Zhang ◽  
Y. Q. Yu
Keyword(s):  
Neural Networks ◽  
Vibration Control ◽  
Inverse Dynamics ◽  
Dynamic Performance ◽  
Active Vibration Control ◽  
Self Tuning ◽  
On Line ◽  
Active Vibration ◽  
Adaptive Control Strategy ◽  
Flexible Linkage

An investigation is presented into the neural networks based active vibration control of flexible linkage mechanisms. A smart mechanism featuring piezoceramic actuators and strain gauge sensors is designed. A nonlinear adaptive control strategy named Neural Networks based Direct Self-Tuning Control (NNBDSC) is employed to suppress the elastodynamic responses of the smart mechanism. To improve the initial robustness of the NNBDSC, the Dynamic Recurrent Neural Network (DRNN) controllers are designed off-line to approximate the inverse dynamics of the smart mechanism. Through on-line control, the strain crest of the flexible link is reduced 60 percent or so and the dynamic performance of the smart mechanism is improved significantly.

Giant Magnetostrictive Material Actuator Based Active Vibration Control-a Modified α - LMS Algorithm

2007 ◽  
Vol 546-549 ◽  
pp. 2219-2222
Author(s):  
Zhao Qing Song ◽  
Shao Lei Zhou ◽  
Xian Jun Shi ◽  
Guo Qiang Liang
Keyword(s):  
Vibration Control ◽  
Controller Design ◽  
Active Vibration Control ◽  
Lms Algorithm ◽  
Experimental Result ◽  
Magnetostrictive Material ◽  
Giant Magnetostrictive Material ◽  
Active Vibration ◽  
Magnetostrictive Actuator ◽  
The Mathematical Model

A modified α-LMS algorithm is presented and is applied to the controller design of active vibration control. A magnetostrictive material actuator is used as experimental equipment for active vibration control in this paper. The merit of the presented method is that it is not necessary to build the mathematical model of magnetostrictive actuator. The experimental result shows that the controller designed is efficient for active vibration control.

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