Subject:
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Re: Sword fighting robots
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Newsgroups:
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lugnet.robotics
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Date:
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Wed, 21 Aug 2002 18:22:38 GMT
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Original-From:
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Pete Hardie <PETE.HARDIE@SCIATLantispam.COM>
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Viewed:
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675 times
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Carl Kadie wrote:
> IDEA:
>
> After watching the Tyron Powers version of Zorro, my 7-year-old son and I
> would like to make two Lego robots that can sword fight each other.
>
> To make it harder: They should be autonomous
> To make it easier: They should "cheat" by sending each other messages to
> coordinate the action.
>
> In other words, we want them to "stage" fight, not really fight. We imagine
> it being very cool to see them fighting very fast.
>
> PROBLEMS:
>
> How can the two robots keep the right distance and orientation from each other?
>
> How can they move their swords precisely?
>
> DETAILS:
>
> We have two RXC 2.0's. 5 Lego motors (and one homemade one), two light
> sensors, 3 touch sensors, 2 light sensors, 1 angle sensor, 1 remote control.
> a good collection of regular Technic and regular Legos. If needed, I would
> buy more stuff for this project. I'm programming in NQC.
>
> So far, our design gives each robot 3 motors. Two drive motors and one to
> raise and lower the sword. One robot has the angle sensor on the sword.
>
> Problem one:
> Even with the angle sensor, I don't know how to move the sword to the
> angle I want. My current program just goes until the angle is reached and
> then turns off the motor. The sword, however, oven overshoots. We'd be
> grateful for tips or pointers on how to do this.
>
> Problem two:
> Ideally, the robots would automatically get themselves facing each other
> at, say, 2 inches apart. From this known position, they could do sequences
> of moves. Maybe there is some way to use the two light sensors to achieve
> this position, but I don't know what it could be. It seems they could look
> for the other's light, but they wouldn't know how far away they are. Maybe
> there is some design using the light sensors to face each other and the
> touch sensors to get the right distance. Anyway, I'm open to any suggestions
> on this.
Use the light sensors for orientation, and touch sensoer for distance - they can
'poke' each other once at the start of the fight :->
I'd suggest a choreographed fight, with a known sequence of moves, and use touch
sensors to detect sword contact. The RCX's can tell the moves to each other
during the fight, even.
--
Pete Hardie | Goalie, DVSG Dart Team
posting from, but not |
speaking for: |
Scientific Atlanta, Digital Video Services Group
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Message is in Reply To:
 | | Sword fighting robots
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| IDEA: After watching the Tyron Powers version of Zorro, my 7-year-old son and I would like to make two Lego robots that can sword fight each other. To make it harder: They should be autonomous To make it easier: They should "cheat" by sending each (...) (22 years ago, 21-Aug-02, to lugnet.robotics)
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