Undefined function 'acker' for input arguments of type 'double'.

Hello all,

My problem is this: Undefined function 'acker' for input arguments of type 'double'. I searched a bit here for an answer and i found out that i have to add the path to my working directory i did that and i still have this problem. My code is this:

clc, clear, cnt=1;
Vin=12; L=100e-3; C=200e-6; R=10;
Vss=24
dnom=1-Vin/Vss
x1ref=Vin/(1-dnom)
x2ref=Vin/R/(1-dnom)^2
xref=[x1ref;x2ref]
dss=dnom
xss=xref

Aon=[-1/R/C 0;0 0] Aoff=[-1/R/C 1/C;-1/L 0] f=10000 T=1/f A1=Aon A2=Aoff

A=A1+A2*dss

B=A2*xss

poles= eig(A)

p1=-800+i

p2=-800-i

K=acker(A,B,[p1 p2])

Does anyone know how to help me? Thanks in advance.

Answer 1

[Mischa Kim]

Konstantinos, there is a chance that you do not have the corresponding (Control System) toolbox licensed/installed. See this answer.

Answer 2

[Thomas]

acker is the old pole placement function using Ackerman's formula from the control system toolbox..

try

 which acker

if you dont find it- mean you do not have the controls toolbox..

Might want to use 'place' instead of 'acker' ( though you might not have place either if you do not have the controls toolbox)

 K=place(A,B,[p1 p2])

%%

 ver

will give you a list of all the toolboxes you have.

Answer 3

[Konstantinos Merokis]

Thank you very much for your fast answers! Helped me a lot!