Removed rank check with a det in a statefbk test

mp4096 · mp4096 · commit 6a2d96ffb674 · 2016-11-20T21:08:11.000+01:00
diff --git a/control/tests/statefbk_test.py b/control/tests/statefbk_test.py
@@ -111,8 +111,7 @@ def testAcker(self):
 
                 # Make sure the system is not degenerate
                 Cmat = ctrb(sys.A, sys.B)
-                if (np.linalg.matrix_rank(Cmat) != states or
-                    abs(np.linalg.det(Cmat)) < 1e-5):
+                if np.linalg.matrix_rank(Cmat) != states:
                     if (self.debug):
                         print("  skipping (not reachable or ill conditioned)")
                         continue
