- #1
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Homework Statement
Below is the bode plot of return difference, 1+C(S)P(S) in a feedback system. Identify the frequencies where the feedback is large, negative, positive and negligible.
[tex]P(S) = \frac{100}{s^2+2s+1}[/tex]
[tex]C(S) = \frac{220(s+50)}{s+200}[/tex]
Homework Equations
Bode Plot, Feedback
The Attempt at a Solution
Is there a way of identifying the frequencies where the feedback is large, negative, positive and negligible just by looking at the bode plot?
So the positive feedback would be where we start gaining phase & magnitude, so it'd be approximately w = 10^2.
Negligible gives you a gain of 1, so the frequency would be w = 5. Is my reasoning right?
Also what characterizes a negative and large feedback?