2 Copyright (C) 2008-2018 EDF R&D
4 This file is part of SALOME ADAO module.
6 This library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
11 This library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with this library; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
22 Author: Jean-Philippe Argaud, jean-philippe.argaud@edf.fr, EDF R&D
24 .. index:: single: ExtendedKalmanFilter
25 .. _section_ref_algorithm_ExtendedKalmanFilter:
27 Calculation algorithm "*ExtendedKalmanFilter*"
28 ----------------------------------------------
33 This algorithm realizes an estimation of the state of a dynamic system by a
34 extended Kalman Filter, using a non-linear calculation of the state and the
35 incremental evolution (process).
37 In case of really non-linear operators, one can easily use the
38 :ref:`section_ref_algorithm_EnsembleKalmanFilter` or the
39 :ref:`section_ref_algorithm_UnscentedKalmanFilter`, which are often far more
40 adapted to non-linear behavior but more costly. One can verify the linearity of
41 the operators with the help of the :ref:`section_ref_algorithm_LinearityTest`.
43 Optional and required commands
44 ++++++++++++++++++++++++++++++
46 The general required commands, available in the editing user interface, are the
49 .. include:: snippets/Background.rst
51 .. include:: snippets/BackgroundError.rst
53 .. include:: snippets/EvolutionError.rst
55 .. include:: snippets/EvolutionModel.rst
57 .. include:: snippets/Observation.rst
59 .. include:: snippets/ObservationError.rst
61 .. include:: snippets/ObservationOperator.rst
63 The general optional commands, available in the editing user interface, are
64 indicated in :ref:`section_ref_assimilation_keywords`. Moreover, the parameters
65 of the command "*AlgorithmParameters*" allows to choose the specific options,
66 described hereafter, of the algorithm. See
67 :ref:`section_ref_options_Algorithm_Parameters` for the good use of this
70 The options of the algorithm are the following:
72 .. include:: snippets/BoundsWithExtremes.rst
74 .. include:: snippets/ConstrainedBy.rst
76 .. include:: snippets/EstimationOf.rst
78 StoreSupplementaryCalculations
79 .. index:: single: StoreSupplementaryCalculations
81 This list indicates the names of the supplementary variables that can be
82 available at the end of the algorithm. It involves potentially costly
83 calculations or memory consumptions. The default is a void list, none of
84 these variables being calculated and stored by default. The possible names
85 are in the following list: ["APosterioriCorrelations",
86 "APosterioriCovariance", "APosterioriStandardDeviations",
87 "APosterioriVariances", "BMA", "CostFunctionJ", "CostFunctionJb",
88 "CostFunctionJo", "CurrentState", "Innovation"].
91 ``{"StoreSupplementaryCalculations":["BMA", "Innovation"]}``
93 Information and variables available at the end of the algorithm
94 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
96 At the output, after executing the algorithm, there are variables and
97 information originating from the calculation. The description of
98 :ref:`section_ref_output_variables` show the way to obtain them by the method
99 named ``get`` of the variable "*ADD*" of the post-processing. The input
100 variables, available to the user at the output in order to facilitate the
101 writing of post-processing procedures, are described in the
102 :ref:`subsection_r_o_v_Inventaire`.
104 The unconditional outputs of the algorithm are the following:
106 .. include:: snippets/Analysis.rst
108 The conditional outputs of the algorithm are the following:
110 .. include:: snippets/APosterioriCorrelations.rst
112 .. include:: snippets/APosterioriCovariance.rst
114 .. include:: snippets/APosterioriStandardDeviations.rst
116 .. include:: snippets/APosterioriVariances.rst
118 .. include:: snippets/BMA.rst
120 .. include:: snippets/CostFunctionJ.rst
122 .. include:: snippets/CostFunctionJb.rst
124 .. include:: snippets/CostFunctionJo.rst
126 .. include:: snippets/CurrentState.rst
128 .. include:: snippets/Innovation.rst
133 References to other sections:
134 - :ref:`section_ref_algorithm_KalmanFilter`
135 - :ref:`section_ref_algorithm_EnsembleKalmanFilter`
136 - :ref:`section_ref_algorithm_UnscentedKalmanFilter`