I have a peculiar confusion regarding the relationship between a closed-loop pole on a root locus plot and its gain and percent overshoot. I have found a point on the root locus plot that MATLAB claims to have a percentage overshoot of 5%:   using the following code:

    s = tf('s');
    gproc = ((s+3)*(s+6))/(s^2*(s+2));
    rlocus(gproc); % plot root locus

However, when I plot the step response, the percent overshoot seems to be 22%:  

using the following code:

    gopen = 13.71*gproc;
    step(feedback(gopen,1));

What is the reason for this discrepancy? Have I misunderstood the MATLAB code?

I have a peculiar confusion regarding the relationship between a closed-loop pole on a root locus plot and its gain and percent overshoot. 

I have found a point on the root locus plot that MATLAB claims to have a percentage overshoot of 5%: 

using the following code:

    s = tf('s');
    gproc = ((s+3)*(s+6))/(s^2*(s+2));
    rlocus(gproc); % plot root locus

However, when I plot the step response, the percent overshoot seems to be 22%: 

using the following code:

    gopen = 13.71*gproc;
    step(feedback(gopen,1));

What is the reason for this discrepancy? Have I misunderstood the MATLAB code?

I have a peculiar confusion regarding the relationship between a closed-loop pole on a root locus plot and its gain and percent overshoot. I have found a point on the root locus plot that MATLAB claims to have a percentage overshoot of 5%: https://i.imgur.com/UqwJciZ.png using the following code:

s = tf('s');
gproc = ((s+3)*(s+6))/(s^2*(s+2));
rlocus(gproc); % plot root locus

However, when I plot the step response, the percent overshoot seems to be 22%: https://i.imgur.com/CJejh4s.png using the following code:

gopen = 13.71*gproc;
step(feedback(gopen,1));

What is the reason for this discrepancy? Have I misunderstood the MATLAB code?

I have a peculiar confusion regarding the relationship between a closed-loop pole on a root locus plot and its gain and percent overshoot. I have found a point on the root locus plot that MATLAB claims to have a percentage overshoot of 5%: using the following code:

    s = tf('s');
    gproc = ((s+3)*(s+6))/(s^2*(s+2));
    rlocus(gproc); % plot root locus

However, when I plot the step response, the percent overshoot seems to be 22%:

using the following code:

    gopen = 13.71*gproc;
    step(feedback(gopen,1));

What is the reason for this discrepancy? Have I misunderstood the MATLAB code?