| Tip
of the Month |
Exciters
are critical test pieces to any forced response measurement system
from modal analysis to calibration. Ensure that you understand and
have adequate stroke and force level from your exciter/amplifier
pairing. Stroke is especially important to generate adequate
acceleration at low
frequencies. |
| Quick Links |
ISO TC 108 -
Mechanical vibration, shock and condition
monitoring
ISO TC 108/SC
3 - Use and calibration of vibration and shock measuring
instruments
SAVIAC -
Orlando, FL (October 24-28)
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Newsletter Articles by Topic |
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Practical
Considerations in Electro-dynamic Vibration Exciter
Selection |
 A popular stop in the exhibit hall was the view
of the SmartShaker with integrated amplifier and there were a number
of questions about shaker force levels, frequency ranges and
shaker/structure mounting means. My colleague,
Mr. Richard Bono, was also in attendance at the ISMA conference and
presented a paper covering Practical
Considerations on Vibration Exciter Selection and
Operation, co-authored by The Modal Shop Structural
Test Product Manager, Mr. Marco Peres.
http://www.modalshop.com/filelibrary/Practical_Aspects_of_
Shaker_Measurements_for_Modal_Testing_Paper_isma2010_0687.pdf
Click here to
link to the presentation presented at ISMA
http://www.modalshop.com/filelibrary/Practical_Aspects_of_
Shaker_Measurements_for_Modal_Testing_rev_ISMA.pdf |
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Common
Options for Accelerometer Calibration Frequency Response
Systems |
 Frequency response function (FRF) and single
point reference frequency amplitude sensitivity are the most common
forms of accelerometer calibration. However, laboratories are
becoming more interested in supplemental test capabilities to ensure
both the health and performance of their users'
accelerometers. The use of the new generation of robust and
precise calibration actuators allows for greater control and shaping
of input energy to shock and vibration calibration. This month
we've compiled a list and short
description of the most common accelerometer calibration system
capabilities. The techniques are in use around the world by
various sensor companies, as well as the leading aerospace and
transportation
manufacturers.
http://www.modalshop.com/calibration.asp?ID=340 |
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Blast
from the Past... |
For those who may be new to our newsletter, we wanted to
highlight an article from one of the first sensor &
calibration tips newsletters - Sensing
Elements: Quartz vs
Ceramic...
 Over the years, there has been a great deal of
discussion about the merits of selecting either quartz or
ceramic as the sensing element for a piezoelectric
accelerometer. This month we'll review the benefits of each,
along with citing certain applications where either one or the other
excels....pun? http://www.modalshop.com/calibration.asp?ID=194 |
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As The
Modal Shop continues to celebrate our 20th Anniversary, we invite
you to visit our Facebook
page and become a fan or follow us on
Twitter. We've been adding both our tradeshow schedule and
information about recent events around The Modal Shop. Come
and see how we live some of our core values of "Total Customer
Satisfaction, Innovation and
Community"!
Sincerely, |
|
 Michael J. Lally A PCB Group Company
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