clear all close all %======================================================== %intensite_exp = xlsread('resonance.xls'); %fexp=intensite_exp(:,1); %I=intensite_exp(:,2); C=10e-9; L=70e-3; R1=1000; R2= 2000; E=4; F=100:10:500000; f=F'; w=2*pi.*f; V1=(R1./(sqrt(1+(R1.^2*(C.*2*pi*f-(L.*2*pi*f).^-1).^2)))); %V2=(5./(sqrt(R2^2+(L.*2*pi*f-(C.*2*pi*f).^-1).^2)))*1000; V2=(R2./(sqrt(1+(R2.^2*(C.*2*pi*f-(L.*2*pi*f).^-1).^2)))); %a=find(I1==max(I1)); %fres=f(a); %plot(f/1000,I1,'b') %text(fres-25,max(I1)+1,num2str(fres)); hold on plot(f/1000,V1,'r') plot(f/1000,V2,'b') %plot(fexp,I,'g') title('Etude de la résonance en intensité'); xlabel('Fréquence, KHz'); ylabel('V1 , mA'); grid on legend('R1=220 Ohm','R2=470 Ohm','Iexp'); hold off