Function Reference: rlocus

Function File: rlocus (sys)
Function File: [rldata, k] = rlocus (sys, increment, min_k, max_k)

Display root locus plot of the specified SISO system.

Inputs

sys

LTI model. Must be a single-input and single-output (SISO) system.

increment

The increment used in computing gain values.

min_k

Minimum value of k.

max_k

Maximum value of k.

Outputs

rldata

Data points plotted: in column 1 real values, in column 2 the imaginary values.

k

Gains for real axis break points.

Block Diagram

 
 
  u    +         +---+      +------+             y
 ------>(+)----->| k |----->| SISO |-------+------->
         ^ -     +---+      +------+       |
         |                                 |
         +---------------------------------+

See also: rlocusx

Source Code: rlocus

Example: 1

  

 s = tf('s');
 g = (s^2+2*s+2)/(s*(s^4+9*s^3+33*s^2+51*s+26));
 rlocus(g);
plotted figure