Hard drive vibration protection
Hard drive vibration protection
(OP)
Any been there, done that, experience with protecting an operating hard drive from vibration?
2.5" laptop drive, operating in a 10 lb aluminum enclosure with the enclosure tested to 0.7 GRMS.
Attempts at using isolation bushings and shock absorbing foams have been less than fully successful, and in one case resulted in accelerometer readings at the drive that were twice the input level measured at the enclosure.
Next attempt will be hard mounting to a "brick" to add mass and then to hard mount all to the enclosure base.
Comments?
2.5" laptop drive, operating in a 10 lb aluminum enclosure with the enclosure tested to 0.7 GRMS.
Attempts at using isolation bushings and shock absorbing foams have been less than fully successful, and in one case resulted in accelerometer readings at the drive that were twice the input level measured at the enclosure.
Next attempt will be hard mounting to a "brick" to add mass and then to hard mount all to the enclosure base.
Comments?





RE: Hard drive vibration protection
<nbucska@pcperipherals.com>
RE: Hard drive vibration protection
frequency - predictable?
amplitude- how big? (is this an earthmover or ohv?
sounds like you found a resonant frequency with that one experiment.
How about suspending it from pretty soft springs- need enough travel, to prevent bottoming.
jay
RE: Hard drive vibration protection
Is that a sine sweep (I guess it is, for a historical reason), if so what frequency range? If it's not, what is it?
What is the vibration spec for your hard drive?
Most laptops pass a drop test from a specified height onto a specified surface, which is a much trickier proposition.
Cheers
Greg Locock
RE: Hard drive vibration protection
http://www.masco-electronics.com/barry150.shtml
In order to isolate your package you need to establish the lowest excitation frequency and select an isolator which will provide a natural frequency of at least 50% of your lowest shock vibration frequency.
To do so, you may need to add mass to the system or use very soft springs (air springs) see :
http://www.firestoneindustrial.com/Isolation.htm
However be aware that air springs don't work well with side to side motions.
Hope that helps.
C. Hugh (www.Hatch.ca)
RE: Hard drive vibration protection
This thread will be usefull to me.
I'm having such a problem, I need to protect a panel with adquisition data modules inside a carrying case, to isolate to the most inpredecible action as deliver it by train, airplane, riding a small truck on uncertain terrains, droping from a table and so more and maby kicking it if thing goes bad.
Any help will be wellcome.
As you can notice there are no frec, way of it or direction
The shock and vibration must came from any way.
The panel is 300 mm Wide (12") 400 Length (16") , the module
mass is despreciable, I think to make the plate as thick to meet an mass increase.
I need to isolate too a batterry weigthing 2640 grams (6.80 pounds) , I can fix it to the panel to have big mass.
fell free to ask any needed data.
devitg@ciudad.com.ar