PRACTICAL MATLAB® FOR ENGINEERS PRACTICAL MATLAB
430 Practical MATLAB® Applications for Engineers subplot(3,1,3) ezplot(VR2 _ t) title(‘VR2(t) vs. t’);axis([0 3 0 110]); xlabel( ...
Fourier and Laplace 431 20 10 0 20 10 0 0 0.5 1 1.5 2 2.5 012 0.2 0.4 0.6 0.8 1.2 1.4 1.6 1.8 0 0 0.2 0.4 0.6 0.8 12 1.2 1.4 1.6 ...
432 Practical MATLAB® Applications for Engineers Example 4.19 The switch in the circuit diagram of Figure 4.77 closes at t = 0, ...
Fourier and Laplace 433 V 1 (s) = 50/s V 2 (s) = ZL1(s) = s ZC1(s) = 2/s R1(s) = 2 R2 (s) = 3 ZL2(s) = 3 s R3 (s) = 4 ZC2(s) = 3 ...
434 Practical MATLAB® Applications for Engineers figure(1) ezplot(Is(1)) title(‘I1(s) vs s’) xlabel(‘ complex frequency s ‘) yla ...
Fourier and Laplace 435 FIGURE 4.79 Plot of I 1 (s) of Example 4.19. 20 15 10 5 0 0246 − 5 − 10 − 15 − 20 − 6 − 4 − 2 complex fr ...
436 Practical MATLAB® Applications for Engineers *************************************************** The system poles are: ans = ...
Fourier and Laplace 437 Is = [2/s+2;8*s/(s^2-9)+1/s]; Vs =inv(Ys)*Is; disp(‘*********************************’) disp(‘********* ...
438 Practical MATLAB® Applications for Engineers disp(‘using the final value theorem are verified returning: ‘) V1 _ inf =limit( ...
Fourier and Laplace 439 − 4 − 4 − 2 − 6 − 2 0246 complex frequency s 14 12 10 8 6 4 2 0 V1 (s) V1 (s) versus s FIGURE 4.83 Plot ...
440 Practical MATLAB® Applications for Engineers Use MATLAB and obtain expressions for I 1 (s) and I 2 (s) Use MATLAB to evalua ...
Fourier and Laplace 441 where Zs s s () 20 10 10 20 and Vs s () 100 0 MATLAB Solution % Scri ...
442 Practical MATLAB® Applications for Engineers >> loop_diffeqs ********************************************* ********* M ...
Fourier and Laplace 443 Example 4.22 Modulated signals are often encountered in telecommunications and consist of mixing (multip ...
444 Practical MATLAB® Applications for Engineers The FM spectrums can be obtained by the expansion of the time function in terms ...
Fourier and Laplace 445 ylabel(‘mag[M(w)]’),axis([-7 7 0 11]), subplot(3,2,3) fplot(‘cos(50*t)’,[0 0.25 -1.5 1.5]); ylabel(‘carr ...
446 Practical MATLAB® Applications for Engineers Cw _ spectrum _ of _ carrier = pi*Dirac(w-50)+pi*Dirac(w+50) ****************** ...
Fourier and Laplace 447 FIGURE 4.88 Time and frequency domain of parts d, e, and f of Example 4.22. 0 0 5 − 5 1 23 0123 0 0 0 2 ...
448 Practical MATLAB® Applications for Engineers t t t t − 2 0 1 2 − 1 − 1 +1 1 f 7 (t) f 4 (t) f 6 (t) f 5 (t) f 1 (t) f 2 (t) ...
Fourier and Laplace 449 x5 = k5*sin(w5*k);x7 = k7*sin(w7*k); subplot(2,2,1);plot(k,x1) subplot(2,2,2);plot(k,x1+x3) subplot(2,2, ...
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