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| author | prashantsinalkar | 2018-02-03 11:01:52 +0530 |
|---|---|---|
| committer | prashantsinalkar | 2018-02-03 11:01:52 +0530 |
| commit | 7bc77cb1ed33745c720952c92b3b2747c5cbf2df (patch) | |
| tree | 449d555969bfd7befe906877abab098c6e63a0e8 /3889/CH5/EX5.8/Ex5_8.sce | |
| parent | d1e070fe2d77c8e7f6ba4b0c57b1b42e26349059 (diff) | |
| download | Scilab-TBC-Uploads-7bc77cb1ed33745c720952c92b3b2747c5cbf2df.tar.gz Scilab-TBC-Uploads-7bc77cb1ed33745c720952c92b3b2747c5cbf2df.tar.bz2 Scilab-TBC-Uploads-7bc77cb1ed33745c720952c92b3b2747c5cbf2df.zip | |
Diffstat (limited to '3889/CH5/EX5.8/Ex5_8.sce')
| -rw-r--r-- | 3889/CH5/EX5.8/Ex5_8.sce | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/3889/CH5/EX5.8/Ex5_8.sce b/3889/CH5/EX5.8/Ex5_8.sce new file mode 100644 index 000000000..ddc724253 --- /dev/null +++ b/3889/CH5/EX5.8/Ex5_8.sce @@ -0,0 +1,22 @@ +//Example 5.8
+//page 326
+//Control Systems: Principles and Design
+//M Gopal, Second Edition, Tata McGraw-Hill
+//Chapter:Concepts of Stability: Routh Stability Array
+
+xdel(winsid())//close all graphics Windows
+clear;
+clc;
+//transfer function
+//substitution of s-1 for s
+s=poly(1,'s');
+P= s^3 +7*s^2 +25*s +39;
+//routh array
+r=routh_t(P)
+disp(r,"Routh Array")
+[r,num]=routh_t(1/P,20)
+if num==0
+ disp("As all the elements in first column are positive,roots of characteristic polynomial are more negative than -1 ")
+else
+ mprintf("There is %g sign changes in entries of first column.\nTherefore, characteistic polynomial has some roots relatively unstable with respect to s=-1", num)
+end
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