系统特征根_20160204

%System characteristic equation
den1 = [ 1 3 12 24 32 48];
den2 = [ 1 4 -4 4 -7 -8 10 ];
den3 = [ 1 3  12 20 35 25 ];
%Calculate system characteristic roots
p1 = roots( den1 )
p2 = roots( den2 )
p3 = roots( den3 )

>> Roots

p1 =

-2.0000 + 0.0000i
-0.5000 + 2.3979i
-0.5000 - 2.3979i
0.0000 + 2.0000i
0.0000 - 2.0000i

p2 =

-5.0000 + 0.0000i
-0.0000 + 1.4142i
-0.0000 - 1.4142i
-1.0000 + 0.0000i
1.0000 + 0.0000i
1.0000 - 0.0000i

p3 =

-0.0000 + 2.2361i
-0.0000 - 2.2361i
-1.0000 + 2.0000i
-1.0000 - 2.0000i
-1.0000 + 0.0000i