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Overhead pivot motion platform. Good idea?

Discussion in 'DIY Motion Simulator Building Q&A / FAQ' started by Quist, Oct 15, 2020.

  1. Quist

    Quist New Member

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    My Motion Simulator:
    2DOF
    I am about to pull the trigger on building a motion platform similar to what tahustveds suggested here in his second (but never finished) project. I seams to me like the only right solution for the reasons crespo80 describes here, but the only finished project I have been able to find is tahustveds first project.

    Any ideas why nobody does this?
    Too complicated to build?
    Resulting motion is off in any way?
    Other reasons why?

    Thanks!
    Quist, Oct 15, 2020
    #1
  2. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
    3DOF, DC motor, JRK
    noorbeast, Oct 15, 2020
    #2
  3. Gadget999

    Gadget999 Well-Known Member

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    you will struggle to do heave and surge with this design
    Gadget999, Oct 16, 2020
    #3
  4. Erik Middeldorp

    Erik Middeldorp Member

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    I was planning to make one similar to @tahustvedt 's first one and made a model to test if I could use an IMU to give position feedback:

    But was having trouble with the IMU and the full size thing would take up a lot of room and be a fair bit of work to design plus it would only be 2 dof. So I've abandoned that idea and now I'm working on an actuator design and hoping to build a 6 dof Stewart platform.
    • Informative Informative x 1
    • Creative Creative x 1
    Erik Middeldorp, Oct 16, 2020
    #4
  5. Quist

    Quist New Member

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    My Motion Simulator:
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    @noorbeast Interesting way to test out ideas. Could be tempting to try. For now I am planning to draw and test it in Solidworks.

    Heave will not be possible but surge will be simulated just like many other 2 DOF motion simulators with pivot below seat. Here you will feel the surge in your butt/belly where many others will be felt in the head.

    @Erik Interesting model you have build. I can imagine the IMU has been very noisy. I think I would have went with position feedback from the motor encoders, and rely on end-stop calibration after power on.
    Quist, Oct 17, 2020
    #5