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Refactored matrix inversions (see #85 and #91) #101

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Merged
slivingston merged 14 commits into from
Dec 31, 2016
Merged

Refactored matrix inversions (see #85 and #91) #101

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4d70d00
Replaced a loop with a map
mp4096 Jun 13, 2016
8285cbf
Removed redundant numpy.linalg.solve calls
mp4096 Jun 13, 2016
29e7f95
Numerical improvements in statefbk.py
mp4096 Jun 13, 2016
443a7e3
Replaced `inv` with `solve` in mateqns
mp4096 Jul 3, 2016
af36e84
Added a test case for the reachable canon. form
mp4096 Jul 3, 2016
b9e4455
Replaced `inv` with `solve` in canonical forms class
mp4096 Jul 3, 2016
1fad4c6
Added a check for unreachable systems to canonical
mp4096 Jul 3, 2016
863538f
Replaced `inv` with `solve` and LSQ in modelsimp
mp4096 Jul 3, 2016
d5cb4f1
Fixed "compatability" typo
mp4096 Jul 3, 2016
6a2d96f
Removed rank check with a det in a statefbk test
mp4096 Jul 12, 2016
7b8c9f0
Added singularity check to the residualization method
mp4096 Jul 13, 2016
860cbe8
Added a unit test for residualization of unstable systems
mp4096 Jul 13, 2016
9a33509
Refactored code to be more pythonic
mp4096 Jul 13, 2016
71fef4b
Check eigenvalues' real part using NumPy
mp4096 Aug 25, 2016
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Check eigenvalues' real part using NumPy 
Faster than converting to a pure Python list.
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@mp4096
mp4096 committed Nov 20, 2016
commit 71fef4b983d78eb3dc657616b5d51a433f82f396
4 changes: 2 additions & 2 deletions control/modelsimp.py
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Expand Up @@ -149,7 +149,7 @@ def modred(sys, ELIM, method='matchdc'):


#Check system is stable
if any(e.real >= 0.0 for e in np.linalg.eigvals(sys.A)):
if np.any(np.linalg.eigvals(sys.A).real >= 0.0):
raise ValueError("Oops, the system is unstable!")

ELIM = np.sort(ELIM)
Expand Down Expand Up @@ -251,7 +251,7 @@ def balred(sys, orders, method='truncate'):
dico = 'C'

#Check system is stable
if any(e.real >= 0.0 for e in np.linalg.eigvals(sys.A)):
if np.any(np.linalg.eigvals(sys.A).real >= 0.0):
raise ValueError("Oops, the system is unstable!")

if method=='matchdc':
Expand Down
2 changes: 1 addition & 1 deletion control/statefbk.py
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Expand Up @@ -355,7 +355,7 @@ def gram(sys,type):

#TODO: Check system is stable, perhaps a utility in ctrlutil.py
# or a method of the StateSpace class?
if any(e.real >= 0.0 for e in np.linalg.eigvals(sys.A)):
if np.any(np.linalg.eigvals(sys.A).real >= 0.0):
raise ValueError("Oops, the system is unstable!")

if type=='c':
Expand Down