Re: Question

[Doug Stewart]

On Tue, Oct 31, 2017 at 8:49 AM, Kaushal Kishore <address@hidden> wrote:

> Sir, I am getting this type of output:
>
>
> /*Transfer function 's' from input 'u1' to output ...
>
>  y1:  s
>
> Continuous-time model.
> error: @s: no function and no method found
> error: called from
>     buck_outer_again at line 7 column 3
> error: evaluating argument list element number 1
> error: called from
>     buck_outer_again at line 7 column 3*/

This is the program:

% % Buck Outer loop... User should enter values...

clear all;

close all;

clc;

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

 s = tf('s');

% s = poly(0,'s');

% G = syslin("c",(((-7.192924e-8*(s^2))+(-195.7839e-12*s)+12.756e-6)/(((30.12163e-9)*(s^2))+(2.50e-3*s)+1)));

 G = @(s)((-7.192924e-8*(s^2))+(-195.7839e-12*s)+12.756e-6) / (((30.12163e-9)*(s^2))+(2.50e-3*s)+1)

 bode(G(2*pi*s), '+')

 set (findobj (gcf, "type", "axes"), "nextplot", "add")

 xlabel('Frequency [1/s]')

% C = syslin("c",((((11.2193e5)*(2.75e-8)*(s^2))+((11.2193e5)*(2.511e-3)*s)+11.2193e5) / (0.075*(s^2)+s)));

 C = @(s)(((11.2193e5)*(2.75e-8)*(s^2))+((11.2193e5)*(2.511e-3)*s)+11.2193e5) / (0.075*(s^2)+s)

 bode(C(2*pi*s), '*', 'color', 'green')

   

 GH = G*C

% GH = sysmult(G,C)

%[GMgh, PMgh, w_pcgh, w_gcgh] = margin(GH)

 bode(GH(2*pi*s), 'o', 'color', 'red')

 

 grid on

Is this what you want?

% % Buck Outer loop... User should enter values...

clear all;

close all;

clc;

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

 s = tf('s');

% s = poly(0,'s');

% G = syslin("c",(((-7.192924e-8*(s^2))+(-195.7839e-12*s)+12.756e-6)/(((30.12163e-9)*(s^2))+(2.50e-3*s)+1)));

 G = ((-7.192924e-8*(s^2))+(-195.7839e-12*s)+12.756e-6) / (((30.12163e-9)*(s^2))+(2.50e-3*s)+1)

bode(G)

 #bode(G(2*pi*s), '+')

 set (findobj (gcf, "type", "axes"), "nextplot", "add")

 xlabel('Frequency [1/s]')

% C = syslin("c",((((11.2193e5)*(2.75e-8)*(s^2))+((11.2193e5)*(2.511e-3)*s)+11.2193e5) / (0.075*(s^2)+s)));

 C = (((11.2193e5)*(2.75e-8)*(s^2))+((11.2193e5)*(2.511e-3)*s)+11.2193e5) / (0.075*(s^2)+s)

 #bode(C(2*pi*s), '*', 'color', 'green')

 bode(C)  

 GH = G*C

% GH = sysmult(G,C)

%[GMgh, PMgh, w_pcgh, w_gcgh] = margin(GH)

 bode(GH, 'o', 'color', 'red')

 

 grid on

--

DAS