# not enough input arguments

1 Ansicht (letzte 30 Tage)
Halil Ibrahim am 7 Jan. 2024
Kommentiert: Sam Chak am 8 Jan. 2024
hi, I'm trying to write a code about cstr simulation and my loop cant continue due to this error, I'm sure it has what it needs for just first iteration but it does not calculate after the k1 part, can you help me please.
clear; clc;
Ts = 0.1;
%t = [1:0.1:1000];
Da1 = 3;
Da2 = 0.5;
Da3 = 1;
x1(1) = 0.5;
x2(1) = 0.5;
x3(1) = 1.5;
u = 0.45;
d2 = 1;
for n=1:1000
k1x1(n) = Ts*f1_func(x1(n),x2(n),Da1,Da2)
k1x2(n) = Ts*f2_func(x1(n),x2(n),Da1,Da2,Da3,d2,u)
k1x3(n) = Ts*f3_func(x2(n),x3(n),Da3,d2)
k2x1(n) = Ts*f1_func(x1(n)+k1x1(n)/2,x2(n)+k1x2(n)/2,u);
k2x2(n) = Ts*f2_func(x1(n)+k1x1(n)/2,x2(n)+k1x2(n)/2,u);
k2x3(n) = Ts*f3_func(x1(n)+k1x1(n)/2,x2(n)+k1x2(n)/2,x3(n)+k1x3(n)/2);
k3x1(n) = Ts*f1_func(x1(n)+k2x1(n)/2,x2(n)+k2x2(n)/2,u);
k3x2(n) = Ts*f2_func(x1(n)+k2x1(n)/2,x2(n)+k2x2(n)/2,u);
%k3x3
k4x1(n) = Ts*f1_func(x1(n)+k3x1(n),x2(n)+k3x2(n),u);
k4x2(n) = Ts*f2_func(x1(n)+k3x1(n),x2(n)+k3x2(n),u);
%k4x3
x1(n+1) = x1(n)+1/6*(k1x1(n)+2*k2x1(n)+2*k3x1(n)+k4x1(n));
x2(n+1) = x2(n)+1/6*(k1x2(n)+2*k2x2(n)+2*k3x2(n)+k4x2(n));
%x3
end
k1x1 = -0.0875
k1x2 = 0.1075
k1x3 = -0.1250
Not enough input arguments.

Error in f1_func (line 3)
dx1 = 1 - x1(t) - Da1*x1(t) + Da2*x2(t)*x2(t);
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### Akzeptierte Antwort

Walter Roberson am 7 Jan. 2024
You declare f1_func as expecting f1_func(x1,x2,Da1,Da2) but starting from
k2x1(n) = Ts*f1_func(x1(n)+k1x1(n)/2,x2(n)+k1x2(n)/2,u);
you only pass in three parameters.
Also
k1x2(n) = Ts*f2_func(x1(n),x2(n),Da1,Da2,Da3,d2,u)
you are passing in 7 parameters there, but
k2x2(n) = Ts*f2_func(x1(n)+k1x1(n)/2,x2(n)+k1x2(n)/2,u);
you are passing in 3 parameters there.
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Halil Ibrahim am 8 Jan. 2024
I'm still trying to fix that index problem you're encounetring when you try to run the code, thats my main problem right now. If I can manage to do that, I will then try to evaluate control parameters using sinusodial and staircase referrance signals, and I'm still open for any help you can give me for that topics. thanks in advance.
Sam Chak am 8 Jan. 2024
I understand that the simulation code for the Adaptive PID controller is not completely fixed. However, I am not familiar with the RK4 version you coded. Now that the issue of passing extra parameters mentioned in your initial question has been resolved, it might be helpful to create a new question specifically addressing the "Index exceeds..." issue.

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