initial commit / add all books

1 files changed, 19 insertions, 0 deletions

diff --git a/1151/CH8/EX8.20/example20.sce b/1151/CH8/EX8.20/example20.sce
new file mode 100755
index 000000000..de1526dd6
--- /dev/null
+++ b/1151/CH8/EX8.20/example20.sce
@@ -0,0 +1,19 @@
+A=[-1 0 0;0 -2 0;0 0 -3]//controlability and observebility

+B=[1;1;0]

+C=[1 0 2]

+p=cont_mat(A,B)

+disp (p," controllability matrix=");

+d=det(p)

+if d==0 

+printf ("matrix is singular, so the system is uncontrollable");

+else

+printf ("system is controllable ");

+end

+g= obsv_mat (A,C);

+disp (g," Observability Matrix=");

+i= det(g)

+if i ==0

+printf ("matrix is singular, so the system is unobservable");

+else

+printf (" system is observable ");

+end