×
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

Jobs

Speed of a cylindre

Speed of a cylindre

Speed of a cylindre

(OP)
I'm looking for a way to estimate the speed of a pneumatic cylinder.  Is there some empiric formula predicting this?  Where can I find references?

Many thanks

RE: Speed of a cylindre

Can you give more info?

Basically, the pressure inside the cylinder creates force on the piston which pushes the piston against load and inertia. Using the second law of Newton you can calculate the acceleration, speed and displacement. The problem is to calculate the pressure changes with time inside the cylinder. This is quite complicated because you have to solve the mass flow rate into the cylinder, the resulting pressure change, the volume change (due to the piston movement), gas temerature change, etc.

The only way is to create a set of differential equation which are non-linear and solve them numerically.

RE: Speed of a cylindre

(OP)
That's what i would like to avoid.

I've already seen a kind of formula taking in acount the length of the tube, the rate flow, the bore diameter of the cylinder and other things... but can't put my hands on it.

That's why I posted here to see if someone knows about it.

thank anyway

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!


Resources