Separation of Sine and Random Components from Vibration Measurements

2012 ◽  
pp. 339-350 ◽  
Author(s):  
Charlie Engelhardt ◽  
Mary Baker ◽  
Andy Mouron ◽  
Håvard Vold
Keyword(s):  
Vibration Measurements ◽  
Random Components

Time-Frequency Analysis of Shock and Vibration Measurements Using Wavelet Transforms

2014 ◽  
Vol 2 (1) ◽  
pp. 60-69
Author(s):  
Divya Choudhary ◽  
◽  
Siripong Malasri ◽  
Mallory Harvey ◽  
Amanda Smith
Keyword(s):  
Frequency Analysis ◽  
Wavelet Transforms ◽  
Vibration Measurements ◽  
Time Frequency Analysis ◽  
Time Frequency

Test Report on Vibration Measurements on a Lightweight MHD Generator Channel

1978 ◽  
Author(s):  
Jerome Pearson ◽  
Roger E. Thaller ◽  
David L. Banazak
Keyword(s):  
Test Report ◽  
Vibration Measurements ◽  
Mhd Generator

Test Report on Vibration Measurements on the C-141 Laser Test

1979 ◽  
Author(s):  
David L. Banaszak ◽  
Dansen Brown
Keyword(s):  
Test Report ◽  
Vibration Measurements

Probability and Random Processes

2018 ◽  
Author(s):  
Stefan Thurner ◽  
Rudolf Hanel ◽  
Peter Klimekl
Keyword(s):  
Random Processes ◽  
Distribution Functions ◽  
Basic Logic ◽  
Heavy Tailed Distributions ◽  
Random Components ◽  
Classical Distribution ◽  
Heavy Tailed ◽  
Basic Facts ◽  
Stochastic Events ◽  
Stochastic Event

Phenomena, systems, and processes are rarely purely deterministic, but contain stochastic,probabilistic, or random components. For that reason, a probabilistic descriptionof most phenomena is necessary. Probability theory provides us with the tools for thistask. Here, we provide a crash course on the most important notions of probabilityand random processes, such as odds, probability, expectation, variance, and so on. Wedescribe the most elementary stochastic event—the trial—and develop the notion of urnmodels. We discuss basic facts about random variables and the elementary operationsthat can be performed on them. We learn how to compose simple stochastic processesfrom elementary stochastic events, and discuss random processes as temporal sequencesof trials, such as Bernoulli and Markov processes. We touch upon the basic logic ofBayesian reasoning. We discuss a number of classical distribution functions, includingpower laws and other fat- or heavy-tailed distributions.

Predicting the Shear Strength of a Wire Bond Using Laser Vibration Measurements

2006 ◽  
Author(s):  
Holger Gaul ◽  
Martin Schneider-Ramelow ◽  
Klaus-dieter Lang ◽  
Herbert Reichl
Keyword(s):  
Shear Strength ◽  
Vibration Measurements ◽  
Wire Bond

scholarly journals Quantifying the Effects of Vibration on Medicines in Transit Caused by Fixed-Wing and Multi-Copter Drones

Drones ◽  
2021 ◽  
Vol 5 (1) ◽  
pp. 22
Author(s):  
Andrew Oakey ◽  
Tim Waters ◽  
Wanqing Zhu ◽  
Paul G. Royall ◽  
Tom Cherrett ◽  
...  
Keyword(s):  
Road Transport ◽  
Uv Spectra ◽  
Frequency Spectra ◽  
Vibration Measurements ◽  
British Pharmacopoeia ◽  
Medical Products ◽  
Industry Standard ◽  
The Stability ◽  
In Transit

The concept of transporting medical products by drone is gaining a lot of interest amongst the medical and logistics communities. Such innovation has generated several questions, a key one being the potential effects of flight on the stability of medical products. The aims of this study were to quantify the vibration present within drone flight, study its effect on the quality of the medical insulin through live flight trials, and compare the effects of vibration from drone flight with traditional road transport. Three trials took place in which insulin ampoules and mock blood stocks were transported to site and flown using industry standard packaging by a fixed-wing or a multi-copter drone. Triaxial vibration measurements were acquired, both in-flight and during road transit, from which overall levels and frequency spectra were derived. British Pharmacopeia quality tests were undertaken in which the UV spectra of the flown insulin samples were compared to controls of known turbidity. In-flight vibration levels in both the drone types exceeded road induced levels by up to a factor of three, and predominant vibration occurred at significantly higher frequencies. Flown samples gave clear insulin solutions that met the British Pharmacopoeia specification, and no aggregation of insulin was detected.

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