1 # -*- coding: utf-8 -*-
3 # Copyright (C) 2008-2017 EDF R&D
5 # This library is free software; you can redistribute it and/or
6 # modify it under the terms of the GNU Lesser General Public
7 # License as published by the Free Software Foundation; either
8 # version 2.1 of the License.
10 # This library is distributed in the hope that it will be useful,
11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 # Lesser General Public License for more details.
15 # You should have received a copy of the GNU Lesser General Public
16 # License along with this library; if not, write to the Free Software
17 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 # See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
21 # Author: Jean-Philippe Argaud, jean-philippe.argaud@edf.fr, EDF R&D
24 from daCore import BasicObjects, PlatformInfo
26 mpr = PlatformInfo.PlatformInfo().MachinePrecision()
27 if sys.version_info.major > 2:
30 # ==============================================================================
31 class ElementaryAlgorithm(BasicObjects.Algorithm):
33 BasicObjects.Algorithm.__init__(self, "TANGENTTEST")
34 self.defineRequiredParameter(
35 name = "ResiduFormula",
38 message = "Formule de résidu utilisée",
41 self.defineRequiredParameter(
42 name = "EpsilonMinimumExponent",
45 message = "Exposant minimal en puissance de 10 pour le multiplicateur d'incrément",
49 self.defineRequiredParameter(
50 name = "InitialDirection",
53 message = "Direction initiale de la dérivée directionnelle autour du point nominal",
55 self.defineRequiredParameter(
56 name = "AmplitudeOfInitialDirection",
59 message = "Amplitude de la direction initiale de la dérivée directionnelle autour du point nominal",
61 self.defineRequiredParameter(
62 name = "AmplitudeOfTangentPerturbation",
65 message = "Amplitude de la perturbation pour le calcul de la forme tangente",
69 self.defineRequiredParameter(
71 typecast = numpy.random.seed,
72 message = "Graine fixée pour le générateur aléatoire",
74 self.defineRequiredParameter(
78 message = "Titre du tableau et de la figure",
80 self.defineRequiredParameter(
81 name = "StoreSupplementaryCalculations",
84 message = "Liste de calculs supplémentaires à stocker et/ou effectuer",
85 listval = ["CurrentState", "Residu", "SimulatedObservationAtCurrentState"]
88 def run(self, Xb=None, Y=None, U=None, HO=None, EM=None, CM=None, R=None, B=None, Q=None, Parameters=None):
89 self._pre_run(Parameters)
91 Hm = HO["Direct"].appliedTo
92 Ht = HO["Tangent"].appliedInXTo
94 # Construction des perturbations
95 # ------------------------------
96 Perturbations = [ 10**i for i in range(self._parameters["EpsilonMinimumExponent"],1) ]
97 Perturbations.reverse()
99 # Calcul du point courant
100 # -----------------------
101 Xn = numpy.asmatrix(numpy.ravel( Xb )).T
102 FX = numpy.asmatrix(numpy.ravel( Hm( Xn ) )).T
103 NormeX = numpy.linalg.norm( Xn )
104 NormeFX = numpy.linalg.norm( FX )
105 if "CurrentState" in self._parameters["StoreSupplementaryCalculations"]:
106 self.StoredVariables["CurrentState"].store( numpy.ravel(Xn) )
107 if "SimulatedObservationAtCurrentState" in self._parameters["StoreSupplementaryCalculations"]:
108 self.StoredVariables["SimulatedObservationAtCurrentState"].store( numpy.ravel(FX) )
110 # Fabrication de la direction de l'increment dX
111 # ---------------------------------------------
112 if len(self._parameters["InitialDirection"]) == 0:
116 dX0.append( numpy.random.normal(0.,abs(v)) )
118 dX0.append( numpy.random.normal(0.,Xn.mean()) )
120 dX0 = numpy.ravel( self._parameters["InitialDirection"] )
122 dX0 = float(self._parameters["AmplitudeOfInitialDirection"]) * numpy.matrix( dX0 ).T
124 # Calcul du gradient au point courant X pour l'increment dX
125 # qui est le tangent en X multiplie par dX
126 # ---------------------------------------------------------
127 dX1 = float(self._parameters["AmplitudeOfTangentPerturbation"]) * dX0
128 GradFxdX = Ht( (Xn, dX1) )
129 GradFxdX = numpy.asmatrix(numpy.ravel( GradFxdX )).T
130 GradFxdX = float(1./self._parameters["AmplitudeOfTangentPerturbation"]) * GradFxdX
131 NormeGX = numpy.linalg.norm( GradFxdX )
133 # Entete des resultats
134 # --------------------
137 Remarque : les nombres inferieurs a %.0e (environ) representent un zero
138 a la precision machine.\n"""%mpr
139 if self._parameters["ResiduFormula"] == "Taylor":
140 __entete = u" i Alpha ||X|| ||F(X)|| | R(Alpha) |R-1|/Alpha "
142 On observe le residu provenant du rapport d'increments utilisant le
145 || F(X+Alpha*dX) - F(X) ||
146 R(Alpha) = -----------------------------
147 || Alpha * TangentF_X * dX ||
149 qui doit rester stable en 1+O(Alpha) jusqu'a ce que l'on atteigne la
152 Lorsque |R-1|/Alpha est inferieur ou egal a une valeur stable
153 lorsque Alpha varie, le tangent est valide, jusqu'a ce que l'on
154 atteigne la precision du calcul.
156 Si |R-1|/Alpha est tres faible, le code F est vraisemblablement
157 lineaire ou quasi-lineaire, et le tangent est valide jusqu'a ce que
158 l'on atteigne la precision du calcul.
160 On prend dX0 = Normal(0,X) et dX = Alpha*dX0. F est le code de calcul.
163 if len(self._parameters["ResultTitle"]) > 0:
164 __rt = unicode(self._parameters["ResultTitle"])
166 msgs += __marge + "====" + "="*len(__rt) + "====\n"
167 msgs += __marge + " " + __rt + "\n"
168 msgs += __marge + "====" + "="*len(__rt) + "====\n"
173 __nbtirets = len(__entete)
174 msgs += "\n" + __marge + "-"*__nbtirets
175 msgs += "\n" + __marge + __entete
176 msgs += "\n" + __marge + "-"*__nbtirets
178 # Boucle sur les perturbations
179 # ----------------------------
180 for i,amplitude in enumerate(Perturbations):
183 if self._parameters["ResiduFormula"] == "Taylor":
184 FX_plus_dX = numpy.asmatrix(numpy.ravel( Hm( Xn + dX ) )).T
186 Residu = numpy.linalg.norm( FX_plus_dX - FX ) / (amplitude * NormeGX)
188 self.StoredVariables["Residu"].store( Residu )
189 msg = " %2i %5.0e %9.3e %9.3e | %11.5e %5.1e"%(i,amplitude,NormeX,NormeFX,Residu,abs(Residu-1.)/amplitude)
190 msgs += "\n" + __marge + msg
192 msgs += "\n" + __marge + "-"*__nbtirets
195 # Sorties eventuelles
196 # -------------------
197 print("\nResults of tangent check by \"%s\" formula:"%self._parameters["ResiduFormula"])
203 # ==============================================================================
204 if __name__ == "__main__":
205 print('\n AUTODIAGNOSTIC \n')