1 files changed, 17 insertions, 0 deletions
diff --git a/257/CH4/EX4.20/example_4_20.sce b/257/CH4/EX4.20/example_4_20.sce
new file mode 100644
index 000000000..e8619fdda
--- /dev/null
+++ b/257/CH4/EX4.20/example_4_20.sce
@@ -0,0 +1,17 @@
+syms i1 i2 R1 R2 C s L x1 x2 B1 B2 M K R
+disp("loop equations are")
+V=i1*(R1+R2)+1/C*('i1-i2')/s-i2*R2
+disp(V)
+zero=L*s*i2+i2*R2-i1*R2+(i1-i2)/(C*s)
+disp(zero)
+
+//force-voltage method
+F=V;
+M=L;
+K=1/C;
+B=R;
+disp("F-V equtions are")
+F=s*x1*(B1+B2)+K*(x1-x2)-s*x2*B2
+disp(F)
+zero=M*s^2*x2+B2*(x2-x1)*s+K*(x2-x1)
+disp(zero)
+\ No newline at end of file