Matlab/Octave for the UG students of the subject - Control Systems

Students of the subject “Control Systems” can use GNU Octave for practising Matlab code.

Following is an example of a simple session while using Octave version 3.6.3 under a Fedora 17 installation.

BODE PLOT

Example 1:

System: (1 + s)

octave:1> sys1 = tf([1 1],[1])

Transfer function 'sys1' from input 'u1' to output ...

y1: s + 1

Continuous-time model.

octave:2> bode(sys1)

octave:5>

The resulting plot:

Example 1:

System: 30/(1 + 0.5s)(s + 1)(s + 5)

octave:13> [numer, denom] = zp2tf([],[-2 -1 -5], 60)

numer = 60

denom =

1 8 17 10

octave:14> sys2 = tf(numer, denom)

Transfer function 'sys2' from input 'u1' to output ...

60

y1: -----------------------

s^3 + 8 s^2 + 17 s + 10

Continuous-time model.

octave:16> close all

octave:17> bode(sys2)

octave:18>

The resulting plot:

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