Question: Figure 9.1 illustrates the root locus of a control system with a negative unity feedback (for k > 0). Determine the maximum value of loop

Figure 9.1 illustrates the root locus of a control system with a negative unity feedback (for k > 0). Determine the maximum value of loop gain so that the closed-loop system is stable.

1) 1

2) 2

3) 3

4) 6

Figure 9.1

6 2 Imaginary Axis (seconds) -8 -6 -4 -2 0 Real Axis

6 2 Imaginary Axis (seconds) -8 -6 -4 -2 0 Real Axis (seconds) 2

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