Low input power 4 K pulse tube cryocooler driven by an inverter helium compressor: Intrinsic temperature oscillations and mechanical vibrations
Sign Up to like & getrecommendations! Published in 2020 at "Cryogenics"
DOI: 10.1016/j.cryogenics.2020.103085
Abstract: Abstract We report on the intrinsic mechanical vibrations and thermal oscillations of a small-scale two-stage pulse tube cryocooler operated by an inverter driven helium compressor. The combination offers a cooling power ranging from 35 to… read more here.
Keywords: mechanical vibrations; compressor; power; cryocooler ... See more keywords
Crystallization of amorphous Ti40.7Hf9.5Ni41.8Cu8 alloy during the low-frequency mechanical vibrations at room temperature
Sign Up to like & getrecommendations! Published in 2020 at "Materials Letters"
DOI: 10.1016/j.matlet.2020.128084
Abstract: Abstract The influence of the low-frequency vibrations at room temperature on the structure of an amorphous Ti40.7Hf9.5Ni41.8Cu8 thin ribbon was studied by X-ray diffraction and high-resolution transmission electron microscopy. It was found that mechanical vibrations… read more here.
Keywords: vibrations room; mechanical vibrations; amorphous ti40; room temperature ... See more keywords
Estimation and correction of the influence of an IR spectometer on mechanical vibrations
Sign Up to like & getrecommendations! Published in 2017 at "Opto-electronics Review"
DOI: 10.1016/j.opelre.2017.04.003
Abstract: Abstract The problem of influence of mechanical vibrations on a measurement is well known and analyzed for ground conditions. However, the problem becomes quite essential and difficult to solve in space conditions. The influence of… read more here.
Keywords: mechanical vibrations; estimation correction; correction influence; spectometer mechanical ... See more keywords
Mechanical Vibrations of Atomically Defined Metal Clusters: From Nano- to Molecular-Size Oscillators.
Sign Up to like & getrecommendations! Published in 2018 at "Nano letters"
DOI: 10.1021/acs.nanolett.8b02717
Abstract: Acoustic vibrations of small nanoparticles are still ruled by continuum mechanics laws down to diameters of a few nanometers. The elastic behavior at lower sizes ( read more here.
Keywords: mechanical vibrations; size; vibrations atomically; atomically defined ... See more keywords
Super Damping of Mechanical Vibrations
Sign Up to like & getrecommendations! Published in 2019 at "Scientific Reports"
DOI: 10.1038/s41598-019-54343-3
Abstract: We report the phenomenon of coherent super decay (CSD), where a linear sum of the displacement of several damped oscillators can collectively decay much faster than the individual ones in the first stage, followed by… read more here.
Keywords: super damping; mechanical vibrations; response; damping mechanical ... See more keywords
Grey-box state-space identification of nonlinear mechanical vibrations
Sign Up to like & getrecommendations! Published in 2018 at "International Journal of Control"
DOI: 10.1080/00207179.2017.1308557
Abstract: ABSTRACT The present paper deals with the identification of nonlinear mechanical vibrations. A grey-box, or semi-physical, nonlinear state-space representation is introduced, expressing the nonlinear basis functions using a limited number of measured output variables. This… read more here.
Keywords: grey box; mechanical vibrations; state space; nonlinear mechanical ... See more keywords
Optical Sensor, Based on an Accelerometer, for Low-Frequency Mechanical Vibrations
Sign Up to like & getrecommendations! Published in 2022 at "Micromachines"
DOI: 10.3390/mi13091462
Abstract: This article documents the design, manufacture, and testing of a silicon inertial optical sensor for low-frequency (lower than 2 kHz) applications. Three accelerometer designs optimized by parameterization using Finite Element Analysis were considered. The accelerometers… read more here.
Keywords: optical sensor; low frequency; frequency; sensor based ... See more keywords