which one of these is the right sol.? and let me know my mistakes please ..
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Rama a
on 5 Jun 2021
Answered: Sulaymon Eshkabilov
on 15 Jun 2021
xb (t)= r(t ) - r(t-A ) - r(t-B ) + r(t-C )
A = 3, B = 4 and C = 4.
which one of these is the right sol.
and let me know my mistakes please
syms Xb t;
y1=t.*heaviside(t);
y2=(t-3).*heaviside(t-3);
y3=(t-4).*heaviside(t-4);
y4=(t-4).*heaviside(t-4);
Xb=y1-y2-y3+y4;
fplot(Xb);
xlabel('t');
ylabel('Xb(t)');
title (' xb(t)= r(t ) - r(t-3 ) - r(t-4 ) + r(t-4 ) ');
***************************************************************
syms t
A=3
B=4
C=4
t= 0: 0.02:5;
u=t>= 0;
u1=t>= 1;
X= t.*u-(t-A).*u1-(t-B).*u1+(t-C).*u1;
plot(t,X)
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Accepted Answer
Sulaymon Eshkabilov
on 5 Jun 2021
Both are accurate and you can get the same results by changing this in the 1st one:
fplot(Xb, [0, 5]);
In the second one, you should not make t symbolic.
Note that the second one is computationally more efficient.
More Answers (1)
Sulaymon Eshkabilov
on 15 Jun 2021
Both gives the same results, if you fix in the second one the time boundary value for u1.
...
A=3;
B=4;
C=4;
t= 0: 0.02:5;
u=t>= 0;
u1=t>= 3; % Start at 3rd second
X= t.*u-(t-A).*u1-(t-B).*u1+(t-C).*u1;
plot(t,X, 'r*--')
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