From b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b Mon Sep 17 00:00:00 2001
From: priyanka
Date: Wed, 24 Jun 2015 15:03:17 +0530
Subject: initial commit / add all books

---
 29/CH7/EX7.17.9/exa7_17_9.sce | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
 create mode 100755 29/CH7/EX7.17.9/exa7_17_9.sce

(limited to '29/CH7/EX7.17.9/exa7_17_9.sce')

diff --git a/29/CH7/EX7.17.9/exa7_17_9.sce b/29/CH7/EX7.17.9/exa7_17_9.sce
new file mode 100755
index 000000000..a7cebccaa
--- /dev/null
+++ b/29/CH7/EX7.17.9/exa7_17_9.sce
@@ -0,0 +1,19 @@
+//caption: gain_margin_and_phase_margin
+//example 7.17.9
+//page 245
+s=%s;
+syms w;
+s1=-s;
+gh=(32/(s*(s+sqrt(6))^3));
+g=sym((32/(s*(s+sqrt(6))^3)));
+s=%i*w;
+a=eval(g);
+w=sqrt(2);
+b=float(eval(abs(a)));
+disp(b,"at w=sqrt(2),|G(jw)H(jw)|=");
+GH=syslin('c',gh);
+gm=g_margin(GH);
+pm=p_margin(GH);
+disp(gm,"Gain margin=");
+disp(pm,"Phase margin=");
+disp("since gm=0 and pm=0, so system is marginally stable")
\ No newline at end of file
-- 
cgit