# Convert a function into a matrix

4 views (last 30 days)
Hend Mostafa on 24 Jun 2022
Commented: Chunru on 24 Jun 2022
I want (h(t)) to be in form of matrix, how to do it?
Parameters= {'R0','R1','C1','Qr','bo','b1','SOC','Vrc','Voc'};
R0=0.000605797;
Qr=147964.8608;
R1=0.000856205;
C1=0.049823238;
% X=[SOC;Vrc];
A=[0 0;0 -1/R1*C1];
B=[1/Qr;1/C1];
C=[1 1];
D= R0;
% u=Il;
sys= ss(A,B,C,D);
tfsys = tf(sys);
n = tfsys.Numerator;
d = tfsys.Denominator;
syms s t
H(s) = poly2sym(n,s) / poly2sym(d,s)
H = vpa(H, 5);
h(t) = ilaplace(H)
h = vpa(h, 5)
figure
fplot(h)
grid
axis([0 0.1 0 20])

Chunru on 24 Jun 2022
Parameters= {'R0','R1','C1','Qr','bo','b1','SOC','Vrc','Voc'};
R0=0.000605797;
Qr=147964.8608;
R1=0.000856205;
C1=0.049823238;
% X=[SOC;Vrc];
A=[0 0;0 -1/R1*C1];
B=[1/Qr;1/C1];
C=[1 1];
D= R0;
% u=Il;
sys= ss(A,B,C,D);
tfsys = tf(sys);
n = tfsys.Numerator;
d = tfsys.Denominator;
syms s t
H(s) = poly2sym(n,s) / poly2sym(d,s)
H(s) =
H = vpa(H, 5);
h(t) = ilaplace(H)
h(t) =
% h = vpa(h, 5)
figure
fplot(h)
grid
axis([0 0.1 0 20])
t1=linspace(0, 0.1, 21)
t1 = 1×21
0 0.0050 0.0100 0.0150 0.0200 0.0250 0.0300 0.0350 0.0400 0.0450 0.0500 0.0550 0.0600 0.0650 0.0700 0.0750 0.0800 0.0850 0.0900 0.0950 0.1000
h1 = double(h(t1))
h1 = 1×21
Inf 15.0041 11.2163 8.3847 6.2680 4.6857 3.5028 2.6185 1.9575 1.4633 1.0939 0.8177 0.6113 0.4570 0.3416 0.2554 0.1909 0.1427 0.1067 0.0798 0.0596
Hend Mostafa on 24 Jun 2022
The H(s) function in the code is supposed to be two terms, the state of charge (SOC) and voltage drop (Vrc), but I dont know which terms they are, so I want it to be converted in to a matrix 2x1 in order to identify which terms
Chunru on 24 Jun 2022
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