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Weston, Massachusetts
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Lego NxT Roboticst-Servo Control LoopsditRegion3

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In a servo loop, the value of an output(such as a motor position) is made to track a control value.

Above: Servo Motor


In this example, the acceleration sensor value is compared to the value of the motor position.
If it is greater, the motor turns one way; if smaller, the motor turns the other way.

But there's a problem- the responding motor tends to overshoot the control value, causing vibration...... we need to make it less sensitive...

Hysteresis

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EditRegion5
 
Revised January 2011 by Jonathan Dietz, dietzj@mail.weston.org