Group items tagged from - Robotics

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Basis Behaviors - 0 views

shared by York Jong on 26 May 07 - Cached

The basis behavior set of a system provides elements that are not further reducible to each other and that, when composed by sequential or concurrent execution, produce the complete behavior repertoire for the system.
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Such basis behaviors are constructed, learned, or evolved from stable, robust interaction dynamics between the agent/robot and its environment, and serve as a substrate for the system's more complex behaviors.
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My work generalized the notion of basis behaviors to multi-robot interactions, and demonstrated how a small set of basis behaviors per robot can be used to demonstrate a rich repertoire of individual and group-level behaviors, including following, flocking, homing, herding, aggregation, dispersion, and formations.
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York Jong on 26 May 07

In 1991 I introduced the notion of basis behaviors, a means for facilitating principled behavior synthesis and analysis in behavior-based systems.

<div class="cArrow"> </div><div class="cContentInner">In 1991 I introduced the notion of basis behaviors, a means for facilitating principled behavior synthesis and analysis in behavior-based systems.</div>

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Build this simple "electronic electroscope," a FET electrometer - 0 views

www.amasci.com/...chargdet.html circuit electrometer electronics electrostatics fet mpf102

shared by York Jong on 30 May 07 - Cached

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This simple circuit can detect the invisible fields of voltage which surround all electrified objects
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The Gate acts as an antenna, so leave it unconnected.
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The 1-meg resistor helps protect the FET from being harmed by any accidental sparks to its Gate lead. The circuit will work fine without this resistor. Just don't intentionally "zap" the Gate wire with a charged object or your charged finger.
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To test the circuit, charge up a pen or a comb on your hair, then wave it close to the little "antenna" wire. The LED should go dark. When you remove the electrified pen or comb, the LED should light up again.
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If you suspect that humidity is very high, test this by rubbing a balloon or a plastic object upon your arm. If the balloon does not attract your arm hairs, humidity is too high.
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This FET sensor is not an ideal educational device because it responds differently to positive than to negative.
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negative objects turn the LED off, it lights again when removed. positive objects make the LED bright, then dark when removed.
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Obtain a small capacitor with a value below 100 picofarads. Connect it between the FET gate lead and one of the other FET leads (doesn't matter which one.) This greatly reduces the sensitivity of the device
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Now make the circuit MORE sensitive. Obtain an alligator clip-lead, and connect it to the Gate lead of the FET. Let it hang loose without touching anything. You'll find that this has vastly increased the sensitivity of your FET circuit.
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York Jong on 30 May 07

This simple circuit can detect the invisible fields of voltage which surround all electrified objects. It acts as an electronic "electroscope.

<div class="cArrow"> </div><div class="cContentInner">This simple circuit can detect the invisible fields of voltage which surround all electrified objects. It acts as an electronic "electroscope.</div>

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