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Help Needed with actuators

Discussion in 'Motor actuators and drivers' started by deadnoob, Apr 4, 2010.

  1. deadnoob

    deadnoob New Member

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    Hi,

    I am working on a project but I'm a little confused about the actuators. I'm trying to figure out the force that would be applied to the rider while the actuators are being pushed up at full speed.

    I see that something like an scn5 actuator has 100N of thrust. What exactly does that mean? I assume it will push with 100N of force, but the rider will weight more than 100N per actuator so I'm kind of lost.

    If anyone can help me out it will be greatly appreciated.


    Thanks
    deadnoob, Apr 4, 2010
    #1
  2. Frakk

    Frakk Active Member

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    Thrust is commonly used to describe jet turbines or the power of an airplane.

    100N thrust straight up will hold an object weighing 100N. This doesn't really apply completely to the actuator in a stand still situation because the ball screw will reduce static loading.

    Now, if you want to calculate the exact force (acceleration) applied to the driver, there are many complications in the equation.
    First, figure out the geometry of the simulator. This includes weight, pivot points, leverage, center of mass, force vectors, etc. If you knew all this, you can calculate the acceleration at any given position for the maximum 100N thrust.
    To make it even more complex, all of the above parameters will change as the actuators move through the motion range, therefore the actual acceleration will also change accordingly.

    If you actually come up with a formula or graph I would be very interested to see it! :D

    And welcome to the forums!
    Frakk, Apr 4, 2010
    #2
  3. egoexpress

    egoexpress Active Member

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    An actuator like the SCN5 with 100N force has a push/pull force of round about 10kg.
    Thats why the SCN5 are just suitable for setups, where the driver wheight is placed on a pivot, like the Frex simulators, or in case a setup is used, where the driver wheight is placed on a spring, which counters the wheight.

    If you would tell us, what type of simulator you want to build, I could give you a more specific answer (tomorrow).

    Sorry in case of bad spelling, I have family at home during this easter feast, and I had lots of red wine this evening :alki:
    Happy holidays, btw :eek:sterhasenkill:
    regards
    egoexpress, Apr 4, 2010
    #3