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 O+=+&43%8TJU
clc;
clear all;
a=input('nhap so a: ');
b=input('nhap so b: ');

c=input('nhap so c: ');
if a==0
disp('ptrinh co nghiem don la:');
x=-c/b;
disp('x = ') ; disp(x);
else a~=0
delta=b^2-4*a*c;
6

if delta==0
disp('ptrinh co nghiem kep la:');
x=-b/(2*a);
disp('x1 = x2 = '); disp(x);
elseif delta>0
disp('ptrinh co 2 nghiem phan biet la:');
x1=(-b+sqrt(delta))/(2*a);
x2=(-b-sqrt(delta))/(2*a);
disp('x1 = '); disp(x1);
disp('x2 = '); disp(x2);
else
disp('ptrinh co 2 nghiem ao la:');
x1=(-b+sqrt(delta))/(2*a);
x2=(-b-sqrt(delta))/(2*a);
disp('x1 = '); disp(x1);
disp('x2 = '); disp(x2);
end
end
 VW/%0&43%8TJU
clc;
clear all;

% do thi y=ax^2+bx+c
a=input('nhap a:');
b=input('nhap b:');
c=input('nhap c:');
if a==0
disp('ham bac nhat');
x=-10:0.1:10;
y=b*x+c;
plot(x,y);
else
disp('pt bac hai');
x=-10:0.1:10;
y=a*x.^2+b*x+c;
plot(x,y);
end
,` ~e
clc;
clear all;
:

d = input('nhap diem vao: ');
if d>=0 & d<=10
if d<5
disp('hoc sinh yeu')
elseif d>=5 & d<6.5
disp('hoc sinh trung binh')
elseif d>=6.5 & d<8
disp('hoc sinh kha')
elseif d>=8 & d<9
disp('hoc sinh gioi')

elseif d>=9
disp('xuat sac')
end
end
3` !K -9wa

clc;
clear all;
<

syms s Kp Kd Ki a;
disp('nhap ham truyen Gs');
disp('vi du:Gs=50/(s*(s+5)) ta nhap:');
disp('num2=50*s^0 ; den=s*(s+5)');
num=input('nhap phuong trinh tu=');
den=input('nhap phuong trinh mau=');
num1=sym2poly(num);
den1=sym2poly(den);
Kv=input('nhap he so van toc Kv=');
e =input('nhap e=');
Wn=input('nhap wn=');
c=length(den1);
h=num1/den1(1,c);
Ki=Kv/h;
den2 =[1 0];
num3 =conv(den1,den2);
num2= [0 Kd Kp Ki];
num4=[num2*num1];
pt1= [num3 + num4];
num5=[1 a];

num6=[1 2*e*Wn Wn*Wn];
num7=[num6 0];
num8=[0 a*num6];
pt2=[num7+num8];
[Kd,Kp,a]=solve(pt1-pt2);
num10= [Kd Kp Ki];
den10 = [1 0];
disp('Bo dieu khien PID:');
disp('Gc=Kd*s+Ki/s+Kp');
Gc = vpa((Kp + Kd*s +Ki/s),4)
6` [7
A

clc;
clear all;
syms s k1 k2 k3;
% Buoc 1:-Nhap diem cuc a vao,nhap thong so:e,Wn vao
% -Nhap ba matran A,B,C vao và vector K =[k1 k2
k3]
a=input('nhap diem cuc a = ');
Wn=input('nhap gia tri Wn = ');
e=input('nhap gia tri e = ');
disp('Nhap ma tran A,B,C : ');
A=input('nhap ma tran A = ');
B=input('nhap ma tran B = ');
C=input('nhap ma tran C = ');
K=[k1 k2 k3];
C

% Buoc 2:-Xet phuong trinh tinh det(s*I-A+B*K)=0 suy ra

duoc pt1
% -Lap pt2=(s-a)*(s^2+2*e*Wn*s+Wn^2)
tinhdet=det(s*eye(3)-A+B*K);
pt1=collect(tinhdet,s);
pt2=collect(((s-a)*(s^2+2*e*Wn*s+Wn^2)),s);
% Buoc 3:Giai he phuong trình cua cac he so tuong ung
cua pt1 và pt2
% tim duoc các an: k1, k2, k3
ham1=collect((pt1-pt2),s);
ham2=coeffs(ham1,s);
[k1,k2,k3]=solve(ham2);
% Buoc 4:Xuat vector hoi tiep trang thai K
disp('Vector hoi tiep trang thai : ');
K=vpa([k1 k2 k3],4)
%;