74 lines
1.1 KiB
Matlab
74 lines
1.1 KiB
Matlab
%% 1
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figure(1);
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syms t;
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f = cos(2*t)*sin(3*t)*heaviside(t);
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L = laplace(f);
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subplot(2,1,1);
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ezplot(f);
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subplot(2,1,2);
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display(L);
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ezplot(L);
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%% 2
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figure(2);
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syms s;
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H1 = ((s+1)*(s+4))/(s*(s+2)*(s+3));
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f1 = ilaplace(H1);
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H2 = (s^3+5*s^2+9*s+7)/(s^2+3*s+2);
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f2 = ilaplace(H2);
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subplot(2,1,1);
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ezplot(f1);
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display(f2);
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subplot(2,1,2);
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display(f2);
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ezplot(f2);
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%% 3
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figure(3);
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a = [1, 0, 1];
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b = [1,2,-3,3,3,2];
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sys = tf(a, b);
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pzmap(sys);
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%% 4
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figure(4);
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a = [1, 5];
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b = [1, 5, 6];
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t = 0:0.01:10;
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h = impulse(a, b, t);
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subplot(3, 1, 1);
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plot(t, h);
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title('单位冲激响应');
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syms s t;
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H = (s+5)/(s^2+5*s+6);
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F = laplace(heaviside(t));
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Y = H*F;
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y = ilaplace(Y);
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subplot(3, 1, 2);
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fplot(y*heaviside(t));
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title('单位阶跃响应');
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f = exp(-t)*heaviside(t);
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Fs = laplace(f);
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Ys = H*Fs;
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yts = ilaplace(Ys);
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subplot(3, 1, 3);
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fplot(yts*heaviside(t));
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title('零状态响应');
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%% 5
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syms t s;
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f = (-t+1)*(heaviside(t)-heaviside(t-2))-(heaviside(t-2)-heaviside(t-3));
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subplot(2, 1, 1);
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ezplot(f);
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subplot(2, 1, 2);
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F = laplace(f);
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H = 1/(s^2+5*s+4);
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Y = F*H;
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y = ilaplace(Y);
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ezplot(y);
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