High-Performance Micro-Electrohydrodynamic Pump Actuator

2003 ◽  
Author(s):  
Kazim M. Ali ◽  
Reza Kashani ◽  
Kevin Hallinan
Keyword(s):  
Electric Fields ◽  
Smart Materials ◽  
High Performance ◽  
Active Vibration Control ◽  
Dielectric Fluid ◽  
Noise Abatement ◽  
Fluid Medium ◽  
Active Structure ◽  
Magnetostrictive Actuators ◽  
Active Vibration

The research aims at building a highly effective, miniaturized electrohydrodynamic pumped actuator. The actuator would provide greater performance in terms of higher force, higher displacement and equivalent bandwidth to the so-called smart materials (piezoelectric and magnetostrictive) actuators of comparable size. The EHD actuators find applications in active structure-borne noise abatement, active vibration control, precision pointing. The on-going research aims at parametrically understanding the actuator with respect to its geometry, contained dielectric fluid medium and electric fields. A multitude of prototypes will be designed, fabricated and tested to provide experimental benchmarking of the model predictions. At the same time, this experimental bench marking will provide practical expertise in both fabricating the concept and incorporating it into smart structures.

Load Dependent Hysteresis Model for GMM and its Parameter Identification

2012 ◽  
Vol 226-228 ◽  
pp. 2385-2389 ◽  
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.

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.

A model of magnetostrictive actuators for active vibration control

2011 ◽  
Author(s):  
Francesco Castelli Dezza ◽  
Simone Cinquemani ◽  
Marco Mauri ◽  
Matteo Maglio ◽  
Ferruccio Resta
Keyword(s):  
Vibration Control ◽  
Active Vibration Control ◽  
Magnetostrictive Actuators ◽  
Active Vibration

Reliability Characterization of a Piezoelectric Actuator Based AVC System

2010 ◽  
Author(s):  
Marco Mazzola ◽  
Francesco Aggogeri ◽  
Angelo Merlo ◽  
Bernhard Brunner ◽  
Maria de la O Rodriguez
Keyword(s):  
Life Cycle ◽  
Life Cycle Cost ◽  
High Performance ◽  
Active Vibration Control ◽  
Control Device ◽  
Surface Finishing ◽  
Shape Error ◽  
Reliability Characteristics ◽  
Active Vibration

Reliability and Maintainability analyses are becoming an increasing competitive advantage in machine tool design. In particular, the goal of machine tools for Ultra High Precision Machining is to guarantee high specified performances and to maintain them over life cycle time. A structured reliability approach applied to such complex and innovative systems must be integrated in the early phase of the design. In this paper, the reliability characterization of an adjustable platform for micromilling operations is presented. The platform is intended to improve the surface finishing of the workpiece, through a broadband Active Vibration Control device based on high performance piezoelectric multilayer actuators. The study intends to assess the capability of the system to maintain along the life cycle the appropriate reduction of the chattering vibrations without any shape error. By dividing the system through a morphological-functional decomposition, the critical elements are detected and their reliability issues are extensively discussed. Their lifetimes are described through opportune distributions and models. The study is completed by the quantitative reliability prediction of the overall system. Finally, a sensitivity analysis is performed and reliability allocation implications are evaluated to determine the effect of every component on the system reliability characteristics and life cycle cost.

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 actuators for active vibration control

2004 ◽  
Vol 13 (3) ◽  
pp. 473-477 ◽  
Author(s):  
Tianli Zhang ◽  
Chengbao Jiang ◽  
Hu Zhang ◽  
Huibin Xu
Keyword(s):  
Vibration Control ◽  
Active Vibration Control ◽  
Magnetostrictive Actuators ◽  
Active Vibration
Sign in / Sign up

Export Citation Format

Share Document