×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Hard drive vibration protection

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?

RE: Hard drive vibration protection

During read the HDD can tolerate higher acceleration than during write. Some HDD-s have accelerometer to shot down writing if the acceleration is too much. This may solve your problem, too.

<nbucska@pcperipherals.com>

RE: Hard drive vibration protection

what kind of vibes?
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

Jay is on the right track :0.7 g rms is a meaningless spec.

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

I was asked once to isolate a computer package in a diesel locomotive cab.  The electronics were constantly damaged by the cab vibration (the package was mounted on the wall).  At that time, I found that the acceleration motions that cased the damage was mostly lateral (side to side), but the vertical impact forces were also high.  The solution was to use coil isolators which isolated in all directions, see:
 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

Hi all there.

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




  






Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Resources

White Paper - Implementing a Multi-Domain System
IoT systems are multi-domain designs that often require AMS, Digital, RF, photonics and MEMS elements within the system. Tanner EDA provides an integrated, top-down design flow for IoT design that supports all these design domains. Learn more about key solutions that the Tanner design flow offers for successful IoT system design and verification. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close