| Tip of the
Month |
Validate the
performance and traceability of all calibration equipment used for
measurements with appropriate recalibration intervals, established
and maintained based upon manufacturers' recommendations and
historical trend data showing the stability of the
reference. |
| 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
NCSLi -
Providence, RI (July 25-29)
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Measurements
Matter! |
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Great Belt Bridge in
Denmark
 | Last week, Thursday,
May 20th, was the celebration of "World Metrology Day" in
recognition of the importance of measurement and calibration
sciences. The celebration web
site features the Great Belt Bridge and details some of the exact
measurement and construction challenges required as part of the
fabrication. As leaders of the dynamic measurement
industry, we all carry the responsibility of understanding the
sensing/measuring process and of providing "good data" leading to
"good results". One particular ritual that does an extremely
good job of conveying this message and its incumbent responsibility
is the Calling of the
Engineer Ceremony in Canada and its counterpart, the Order of the
Engineer in the USA. Though it has no actual connection,
legend has it that the ceremonial
ring worn by each engineer inducted, is made from the iron of a
collapsed bridge and is a continual reminder to the practicing
engineer of the enormous social responsibility inherent in the
commitment to good research, design and fabrication. Here at
The Modal Shop and PCB Group, we take the time to renew our
commitment to quality dynamic measurement tools and sharing the
education necessary to apply and understand good measurement
practices. |
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Fundamentals
of Modal Analysis |
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 Though the vibration and structural test
field is rich in history and application, there is a shortage of
good primers to educate the latest crop of young engineers.
One of the best examples that I have for reference is the
Fundamental of Modal Analysis written by the team at Hewlett Packard
in the days back before the Agilent spinoff. This primer
provides a great balance between introductory overview and necessary
detail to understand the common challenges of the test engineer in
the structural testing/modal analysis field. Click here to
download 56 pages of modal analysis fundamental content which
spans topics from simple descriptions of structural dynamics, to the
Fast Fourier Transform (FFT) to Multiple input Multiple output
(MIMO) testing to improving measurement accuracy to an overview of
Modal Parameter
Estimation. |
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2010 celebrates
our 20th Anniversary. Become a fan of our Facebook
page and see pictures of "Modal Shoppers" (and maybe some of
your colleagues) from our past conferences, applications and
celebrations. As you'll see in the pictures, we're here to
serve you with all your dynamic sensor and calibration
needs.
Sincerely, |
 Michael J. Lally A PCB Group Company
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