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FILTRE PASIVE
R=2; L=2.5; C=2.5;
u=1;
dxdt=[-(R/L)*x(1)-(1/L)*x(2)+(1/L)*u; (1/C)*x(1)]
graphic:
1) Alegem u=sin(2*Π*f*t)=sin(ω*t)
u=sin(0.158*t)
[t,x]=ode23('fobs',[0,80],[0,0])
plot(t,x,t,sin(0.158*t))
2) Pentru frecvența f=0,043 rad/s => ω=0,275
R=2 L=2.5 C=2.5 u=sin(0.275*t)
[t,x]=ode23('fobs',[0,80],[0,0])
plot(t,x,t,sin(0.275*t))
3) Pentru frecvența f=0,95 rad/s => ω=6
R=2 L=2.5 C=2.5 u=sin(6*t)
[t,x]=ode23('fobs',[0,80],[0,0])
plot(t,x,t,sin(6*t))
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