PID Tuning tools not supported for plant models of type 'tf'

Hi everyone, I have been trying to use PID tuning tools from matlab and this is the error I get:

PID Tuning tools not supported for plant models of type 'tf'

The code being utilized is the following:

m1 = 290;
m2 = 59;
k1 = 16812;
k2 = 190000;
b1 = 1000;
alfa=4.515*(10^13);
beta=1;
gama=1.545*(10^9);
tau=(1/30);
Ps=10342500;
A=3.35*(10^(-4));
Aa=[0         1          0            0        0         0         
   -k1/m1  -(b1)/m1    (k1/m1)      (b1/m1)   A/m1       0        
    0         0          0            1        0         0        
    k1/m2    b1/m2    -(k1+k2)/m2  -b1/m2    -A/m2       0        
    0      -alfa*A       0          alfa*A   -beta  gama*sqrt(Ps) 
    0         0          0            0        0         -1/tau  ];
Ba=[0                 
    0                 
    0                 
    0              
    0                 
    1/tau];             
Ca=[1 0 0 0 0 0];
Da=0;
[num,den]=ss2tf(Aa,Ba,Ca,Da);
HH=ss(Aa,Ba,Ca,Da);
H=tf(num,den);
[C,info] = pidtune(H,'pid')
ZHI=zpk(H)
I have tried with the types ss, zpk and tf and none of them works. Could someone please help me?

Thank you very much.

Best regards,

Allan

Answer 1

[Arkadiy Turevskiy]

Your code runs fine when I try it. Could it be you have some 3rd party toolbpx installed which also has pidtune function? What do you get if you type >> which pidtune ? It should be something like this: C:\Program Files\MATLAB\R2016a\toolbox\control\ctrldesign\@DynamicSystem\pidtune.m % DynamicSystem method

If that's not the problem, then maybe it's the installation issue. You can contact technical support and they can assist you.