Highly Efficient Piezoelectric Actuators for Active Vibration Control

2003 ◽  
Vol 785 ◽  
Author(s):  
Enrico L. Colla ◽  
Ganesh Suyal ◽  
Sandrine Gentil ◽  
Nava Setter
Keyword(s):  
High Performance ◽  
Low Voltage ◽  
Active Vibration Control ◽  
Driving Voltage ◽  
Efficient Design ◽  
Mechanical Amplification ◽  
Active Vibration Damping ◽  
Active Vibration ◽  
Displacement Force ◽  
A New Technique

ABSTRACTAn high performance / inexpensive diskbender actuator was produced by combining efficient design and fabrication methods and a new technique to operate these actuators was developed and tested, which can enhance the displacement and force capabilities by almost a factor of 2 by using the same maximal driving voltage.The properties of these actuators are intermediate between those of standard bimorphs, used for very large displacements but providing rather small forces, and those of low voltage stack multilayers, which provide quite large forces but are generally heavier, larger and expensive for equivalent displacements. The absence of any external mechanical amplification mechanism and their geometry make these actuators particularly suitable for active vibration damping applications within buildings affected by perturbations of hundreds of μm or for noise control by emission of controlled sound in antiphase. The class of displacement/force, which can be obtained with suitably dimensioned actuators, provides sufficient high motion even for the lower audio frequency region (400–1500 Hz).In order to lower the driving voltages, multilayer diskbenders were also fabricated with the same technique. The number of layers does not influence the actuator displacement and force properties but the increased capacity of the actuator may require sophisticated driving amplifiers.

scholarly journals An Approach of Vibration Control Based on the Design of Three DOFs Active Vibration Damping Platform

2019 ◽  
Vol 224 ◽  
pp. 05010
Author(s):  
Yi Ye ◽  
Miaoxian Guo
Keyword(s):  
Numerical Simulations ◽  
Vibration Control ◽  
Natural Frequency ◽  
Maximum Stress ◽  
Active Vibration Control ◽  
Vibration Damping ◽  
Yield Limit ◽  
Maximum Displacement ◽  
Active Vibration Damping ◽  
Active Vibration

In this paper, an active vibration control platform is developed for milling processes. In this system, the workpiece is driven by a specially designed active platform to control the relative vibration between the tool and workpiece during milling processes. Numerical simulations are carried out to validate the effectiveness of the control platform. Results indicate that maximum stress of the hinge mechanism of the platform is far less than the yield limit of the material, and the designed platform can meet the use requirements in terms of the maximum displacement and natural frequency.

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.

A high-performance low-voltage current-mode min/max circuit

2015 ◽  
Vol 34 (4) ◽  
pp. 1172-1183 ◽  
Author(s):  
Reza Chavoshisani ◽  
Mohammad Hossein Moaiyeri ◽  
Omid Hashemipour
Keyword(s):  
High Performance ◽  
Low Voltage ◽  
Supply Voltage ◽  
Current Mode ◽  
Input Current ◽  
Efficient Design ◽  
Content Type ◽  
Current Comparator ◽  
Logic Module ◽  
Percent Improvement

Purpose – Current-mode approach promises faster and more precise comparators that lead to high-performance and accurate winner-take-all circuits. The purpose of this paper is to present a new high-performance, high-accuracy current-mode min/max circuit for low-voltage applications. In addition, the proposed circuit is designed based on a new efficient high-resolution current conveyor-based fully differential current comparator. Design/methodology/approach – The proposed design detects the min and max values of two analog current signals by means of a current comparator and a logic module. The comparator compares the values of the input current signals accurately and generates two digital control signals and the logic module determines the min and max values based on the controls signals. In addition, an accurate current copy module is utilized to copy the input current signals and convey them to the comparator and the logic module. Findings – The results of the comprehensive simulations, conducted using HSPICE with the TSMC 90 nm CMOS technology, demonstrate the high-performance and robust operation of the proposed design even in the presence of process, temperature, input current and supply voltage variations. For a case in point, for 5 μA differential input current the average propagation delay and power consumption of the proposed circuit are attained as 150 ps and 150 µW, respectively, which leads to more than 64 percent improvement in terms of power-delay product as compared with the most efficient design, previously presented in the literature. Originality/value – A new efficient structure for current-mode min-max circuit is proposed based on a novel current comparator design which is accurate, high-performance and robust to process, voltage and temperature variations.

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.

scholarly journals Active Vibration damping of Smart composite beams based on system identification technique

2018 ◽  
Vol 5 (1) ◽  
pp. 43-48 ◽  
Author(s):  
Kouider Bendine ◽  
Zouaoui Satla ◽  
Farouk Benallel Boukhoulda ◽  
Mohammed Nouari
Keyword(s):  
System Identification ◽  
Active Vibration Control ◽  
State Equation ◽  
Linear Quadratic ◽  
Ansys Apdl ◽  
Finite Element Package ◽  
Identification Technique ◽  
Active Vibration Damping ◽  
Active Vibration ◽  
Space State

Abstract In the present paper, the active vibration control of a composite beam using piezoelectric actuator is investigated. The space state equation is determined using system identification technique based on the structure input output response provided by ANSYS APDL finite element package. The Linear Quadratic (LQG) control law is designed and integrated into ANSYS APDL to perform closed loop simulations. Numerical examples for different types of excitation loads are presented to test the efficiency and the accuracy of the proposed model.

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.

A New Assembly-Transferred Microwave Switch With Suspended CMOS-Compatible Coplanar Waveguides

2001 ◽  
Author(s):  
Jen-Yi Chen ◽  
Long-Sun Huang ◽  
Chia-Hua Chu ◽  
I-Yin Li ◽  
Yao-Hui Kuo ◽  
...  
Keyword(s):  
Transmission Lines ◽  
High Performance ◽  
Low Voltage ◽  
Transmission Efficiency ◽  
Cmos Process ◽  
Driving Voltage ◽  
Coplanar Waveguides ◽  
Electrostatically Actuated ◽  
Functional Complex ◽  
Microwave Switch

Abstract The paper reports a new, transferred micromachined microwave switch on top of suspended transmission lines for high performance and Si-based CMOS compatibility. The micro assembly transfer technique is used to integrate functional complex structures of the mircomachined microwave switch and suspended coplanar waveguides. The electrostatically actuated torsional switch has been successfully driven in a low voltage of 17 volt. Furthermore, the resonance of its dynamic behavior is numerically calculated as 2.6 KHz. In summary, the new microwave switch with suspended Si-based coplanar waveguides presents low driving voltage, CMOS-process compatibility and potentially high transmission efficiency on a lossy Si-based substrate.

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