(f) More than two unstable open-loop poles, DC gain is 1.25, with following Nyquist plot: 2 -1 -2 -3 -2 -1 0 1 2 Re{L(io) {(o)u

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Each item below describes key characteristics of a particular system (that is, a plant transfer function).

For each system, describe the effect of proportional control on the stability of the closed-loop system.

Specifically, 1) what can you say for small gains, and 2) what for large gains? (E.g., stable, unstable, inconclusive.) Provide a short explanation of your answers, with sketches as necessary.

(f)
More than two unstable open-loop poles, DC gain is 1.25, with following Nyquist plot:
2
-1
-2
-3
-2
-1
0
1
2
Re{L(io)
{(o)u
Transcribed Image Text:(f) More than two unstable open-loop poles, DC gain is 1.25, with following Nyquist plot: 2 -1 -2 -3 -2 -1 0 1 2 Re{L(io) {(o)u
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