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Nutational damping in satellites

  1. Jul 2, 2009 #1
    i want to ask ....how can i model sloshing of fuel in satellite feul tank , to an energy sink model....
    can anybody help me?
     
  2. jcsd
  3. Jul 2, 2009 #2
    in one of the experiment NASA has done, they have modelled this to pendulum model....but i want to incorporate energy dissipation to it too
     
  4. Jul 3, 2009 #3

    D H

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  5. Jul 3, 2009 #4

    Danger

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    Wouldn't it be easier to use a slosh-free tank design, such as a mesh filler?
     
  6. Jul 3, 2009 #5

    D H

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    A mesh doesn't stop slosh, but it can help attenuate it -- in the right circumstances.

    Spacecraft designers do use meshes (isogrids) as one of several passive anti-slosh devices. See http://books.google.com/patents/about?id=cUoHAAAAEBAJ".

    Unless the fuel tank is packed jam full with passive anti-slosh devices, there will always be slosh of some sort. Since slosh has resulted in multiple vehicle incidents, it is a very good idea to confirm via analysis and simulation that the passive anti-slosh devices and active slosh controls will work to keep the vehicle under control.

    Everything you want to know about slosh: http://sloshcentral.bbbeard.org/.
     
    Last edited by a moderator: Apr 24, 2017
  7. Jul 3, 2009 #6

    Danger

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    Thanks, DH. That was very informative. I never realized how complex the matter is.
     
  8. Jul 5, 2009 #7
    thanks DH..
    i was looking for this only....
    but one more thing to ask..
    i m working with non-dimensionalzd equations
    so wud it be more beneficial to work with damping ratio ς = c/2mω0. where m is the total mass of body....
    or damping ratio ς = c/2mω0. where m is the mass of fuel....
    hope u r getting what i m tryin to ask....
     
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