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| Ball and beam ： ウィキペディア英語版 |
Ball and beam
The ball and beam system consists of a long beam which can be tilted by a servo or electric motor together with a ball
rolling back and forth on top of the beam.
It is a popular textbook example in control theory.
The significance of the ball and beam system is that it is a simple system which is open-loop unstable.
Even if the beam is restricted to be very nearly horizontal, without active feedback, it will swing to one side or the
other, and the ball will roll off the end of the beam. To stabilize the ball, a control system which
measures the position of the ball and adjusts the beam accordingly must be used.
In two dimensions, the ball and beam system becomes the ball and plate system, where a ball rolls on top of
a plate whose inclination can be adjusted by tilting it frontwards, backwards, leftwards, or rightwards.
==External links==
* (Ball & Beam with various controls strategies )
* (Ball and Beam 1: basics )
* (Ball and Beam with comprehensive dynamics and movies )
* (Ball and Beam Experiment from Quanser )
* (Low cost Ball and Plate system with support for Scilab/Scicos code generation from Evidence )
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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