How can we conclude that the open loop system on page 6 is stable from the bode plot?

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How can we conclude that the open loop system on page 6 is stable from the bode plot?

The bode plot is of the open loop transfer function, but it tells us about stability of the closed loop transfer function. If you're interested in stability of the open loop transfer function then just check the positions of the poles. If any have a real part greater than zero then the open loop system is unstable.

--Mary Dunlop 15:53, 6 November 2006 (PST)