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Thread: Throwing Bot?

  1. Re: Throwing Bot?

    The Robo-Games rules for humanoid wrestling says that the robot can be anywhere in height between 20cm and 120 cm and weight has no limit-now I'd say that a 120cm 6kg bot would have no problem throwing a 20cm 1.5kg bot. While most of the robots in the competition are (and I'm just guessing here) 50-60cm tall and 2-3kg, the rules allow for a robot twice the size and several times the weight, which is more then enough hardware to throw something that weighs half as much.

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    Re: Throwing Bot?

    Doesn't matter. I've taught many a 105lb 5'1 woman to throw a 280lb 6'5+ man. It's leverage, balance, and acceleration.
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  3. Re: Throwing Bot?

    Right. I'm just thinking a larger size would make it easier to do and not make the programming for the move that much more extensive.

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    Re: Throwing Bot?

    Unless you can monster dead lift someone, it's easier for small to throw large generally because it's easier to place the "fulcrum"
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  5. Re: Throwing Bot?

    I'm thinking something like this fight: [ame="http://www.youtube.com/watch?v=FMMnK3rcmC0"]YouTube - ROBO-ONE: Myro2 - A Humongous Humanoid Robot[/ame]

    Now the big one already has the claws, why not just write a program to reach out, grab, lift and throw? The servos that it needs just to move around would have to be strong enough to pick up the smaller robots, and then it's just a matter of swinging the arm. I'm actually thinking that lower hand would be more effective then upper in the case of these robots.

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    Re: Throwing Bot?

    Quote Originally Posted by rudukai13 View Post
    I'm thinking something like this fight: http://www.youtube.com/watch?v=FMMnK3rcmC0
    Now the big one already has the claws, why not just write a program to reach out, grab, lift and throw? The servos that it needs just to move around would have to be strong enough to pick up the smaller robots, and then it's just a matter of swinging the arm. I'm actually thinking that lower hand would be more effective then upper in the case of these robots.
    Haha that was a really funny video.
    Heres a thought, what if you made a bot that bear hugged the opponent, and then rolled backwards, hopefully hurling them across the ring.
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    Re: Throwing Bot?

    I'll start by saying that I don't know that my idea would actually work, and this is just my opinion. My humanoid is an isobot...so I doubt I'll be winning a match any time soon...though sir isobot did do rather well against his much larger opponent at robogames...Which I suppose is proof that bigger is not always better.

    In anycase I think I have seen a robot that hugs its opponent and falls over backwards. Turning that into a throwing technique would require that the robot let go at just the right time. it would also require that the throwbot initiate the motion at the right part of its body...you would want more of an arching motion than just falling over. The same could be said for picking up a robot using grippers, only the problem becomes more complex. When a robot lifts something, it has to change the location of its own center of gravity to account for the new mass. It seams like in watching fights robots are nocked down as much by their own attacks almost as much as they are by the attacks of others.

    Matt Bauer described one technique that I think could be adapted to accomplish what you are looking to do. The throwbot would be outfitted with a sickle type weapon at the end of its right arm. When the opponent came into range, the throw bot would crouch down lowering its center of gravity, plant its left arm forming a tripod base, and swing its right arm up in an uppercut motion scraping the sickle on the ground, coming up and hopefully catching on some part of the underbits of its opponent. The arm if sufficiently strong could then continue its motion lifting the opponent up and "throwing" it.

    Well...thats how I would do it.

    DB

  8. Re: Throwing Bot?

    Having a passive gripping system could work better then an actuated gripper because you wouldn't have to program the release into the hand, however it would have less control and wouldn't be as predictable-with the sickle you might just lift it an inch or two off the ground and then have it topple over. With a gripper and a large enough robot you could pick up the opponent, walk to the edge, and drop him off.

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