Control package
Revision as of 05:39, 23 September 2015 by Rezahousseini (talk  contribs) (→Linear System Representation)
The control package is part of the Octave Forge project.
Function list
Linear System Representation
Chapter  Function  Implemented  File  Status 

Basic Models  tf  yes  @tf/tf.m  
zpk  yes  zpk.m  
ss  yes  @ss/ss.m  
frd  yes  @frd/frd.m  
pid  no  
pidstd  no  
pid2  no  
dss  yes  @lti/dss.m  
drss  no  
filt  yes  filt.m  
rss  no 
Model Interconnection
Model Transformation
Linear Analysis
Control Design
Matrix Computations
Some very basic examples
PT1/lowpass filter step response
Code: Creating a transfer function and plotting its response 
T1=0.4; # time constant
P=tf([1], [T1 1]) # create transfer function model
step(P,2) # plot step response
#add some common markers like the tangent line at the origin, which crosses lim(n>inf) f(t) at t=T1
hold on
plot ([0 T1], [0 1],"g")
plot ([T1 T1], [0 1],"k")
plot ([0 T1], [11/e 11/e],"m")
hold off

Try also bode(P)! (a first order lowpass filter has 3db magnitude at f=1/T1)