Results 31 to 40 of about 39,725 (266)
Active control of vibrations using externally excited piezoceramic devices [PDF]
The Journal of the Acoustical Society of America, 1987 The design and function of piezoceramic devices containing either one (unimorph) or two (bimorph) piezoceramic disks are described. The function of these devices is to null the transmitted displacement field or both the transmitted and reflected displacement fields when a displacement or pressure field is impressed on one side of the device.
X. Q. Bao, V. K. Varadan, V. V. Varadan
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Influence of an Argon/Silane Atmosphere on the Temperature of a Thermal Plasma
Advanced Engineering Materials, EarlyView.The influence of a silane‐doped argon atmosphere on the chemical composition and temperature of a thermal nontransferring argon plasma is investigated using optical emission spectroscopy. As a result of the high amount of free electrons resulting from the stepwise ionization and dissociation of the silane molecule, even a silane addition of 0.01 vol ...
Lena Kreie +4 more
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Electromagnetic damper using brushless direct drive DC motor
Mechanical Engineering Journal, 2018 To fabricate a semiactive type of damper that is comparatively compact and has low mechanical loss, the author developed an electromagnetic damper using a brushless direct drive DC motor. The damper comprises a ball screw mechanism and a brushless direct
Taichi MATSUOKA
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Vibration quenching device using Hula-Hoop and displacement magnification mechanism
Nihon Kikai Gakkai ronbunshu, 2020 This paper deals with the vibration quenching problem of the single-degree-of-freedom system with a limited power supply using a Hula-Hoop and displacement magnification mechanism. This system is forced by the centrifugal force of rotating unbalance.
Kazunari INAGAKI +4 more
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3D‐Printed Giant Magnetoresistive (GMR) Sensors Based on Self Compliant Springs
Advanced Engineering Materials, EarlyView.This work explores 3D‐printed GMR sensors utilizing self‐compliant spring structures and conductive PLA composites. By optimizing arm width, we achieved high piezoresistive (0.34%/mm) and magnetoresistive (0.77%/mT) sensitivities. Demonstrated through Bluetooth‐integrated pressure and magnetic position sensing, these full printed low‐cost, customizable
Josu Fernández Maestu +4 more
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Electrical Conductivities of Conductors, Semiconductors, and Their Mixtures at Elevated Temperatures
Advanced Engineering Materials, EarlyView.This article presents a comprehensive review of temperature‐dependent electrical conductivity data for multiple material classes at elevated temperatures, highlighting a persistent conductivity gap between metals and semiconductors in the range of 102$\left(10\right)^{2}$– 107$\left(10\right)^{7}$ S/m. Metal–ceramic irregular metamaterials are proposed
Valentina Torres Nieto, Marcia A. Cooper
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Advanced Engineering Materials, EarlyView.This study develops sustainable MgO–C refractories using recycled materials and eco‐friendly fructose–tannin binders. The enhanced performance of citric acid as a cross‐linker and functional additives on mechanical and thermomechanical properties was examined. Characterization included strength tests, immersion trials, and microstructural and inclusion
Dinesh K. Gunasekar +7 more
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Some Recent Developments in Adaptive Tuned Vibration Absorbers/Neutralisers
Shock and Vibration, 2006 The vibration absorber has been used for vibration control purposes in many sectors of engineering from aerospace, to automotive to civil, for the past 100 years or so.
Michael J. Brennan
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Surface Tension Measurement of Ti‐6Al‐4V by Falling Droplet Method in Oxygen‐Free Atmosphere
Advanced Engineering Materials, EarlyView.In this article, the temperature‐dependent surface tension of free falling, oscillating Ti‐6Al‐4V droplets is investigated in both argon and monosilane doped, oxygen‐free atmosphere. Droplet temperature and oscillation are captured with one single high‐speed camera, and the surface tension is calculated with Rayleigh's formula.
Johannes May +9 more
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Energy Dissipation and Vibration Control: Modeling, Algorithm and Devices [PDF]
, 2018 While the study of vibration and energy dissipation is one of the oldest topics in engineering, it also encompasses some of the most exciting engineering problems of our time. From the exploration of deep sub-sea reservoirs to the stabilization of spacecraft in orbit, the problem of vibration control is ever present.
Gangbing Song (Ed.) +2 more
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