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

Transcribed Image Text:

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