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Craig Warren
2016-05-09 14:29:45 +01:00
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@@ -28,9 +28,9 @@ The package features an optimisation technique based on Taguchi's method. It all
This package combines a number of advanced features and should not be used without knowledge and familiarity of the underlying techniques. It requires: This package combines a number of advanced features and should not be used without knowledge and familiarity of the underlying techniques. It requires:
* Knowledge of Python to contruct a model input file to use with the optimisation * Knowledge of Python to contruct an input file to use with the optimisation
* Understanding of optimisation techniques in general, and in particular Taguchi's method * Familiarity of optimisation techniques, and in particular Taguchi's method
* Care and 'sanity' checking to be made throughout the process * Careful sanity checks to be made throughout the process
Taguchi's method Taguchi's method
@@ -110,7 +110,7 @@ The following example demonstrates using the Taguchi optimisation process to opt
FDTD geometry mesh showing bowtie antenna with slots and loading resistors. FDTD geometry mesh showing bowtie antenna with slots and loading resistors.
The bowtie design features 3 vertical slots (y-direction) in each arm of the bowtie. Each slot has different loading resistors, but within each slot there are 4 resistors of the same value. A resistor is modelled as two parallel edges of a cell. The bowtie is placed on a lossless substrate of relative permittivity 4.8. The antenna is modelled in free space, and an output point of the electric field (named ``Ex60mm``) is specified at a distance of 60mm from the feed of the bowtie (red coloured cell). The bowtie design features three vertical slots (y-direction) in each arm of the bowtie. Each slot has different loading resistors, but within each slot there are four resistors of the same value. A resistor is modelled as two parallel edges of a cell. The bowtie is placed on a lossless substrate of relative permittivity 4.8. The antenna is modelled in free space, and an output point of the electric field (named ``Ex60mm``) is specified at a distance of 60mm from the feed of the bowtie (red coloured cell).
.. literalinclude:: ../../user_libs/optimisation_taguchi/antenna_bowtie_opt.in .. literalinclude:: ../../user_libs/optimisation_taguchi/antenna_bowtie_opt.in
:language: none :language: none
@@ -146,13 +146,13 @@ When the optimisation has completed a summary will be printed showing histories
resouter [250.07498, 0.87031555, 0.1, 0.1] resouter [250.07498, 0.87031555, 0.1, 0.1]
.. figure:: images/user_libs/taguchi_fitness_hist.png .. figure:: images/user_libs/taguchi_fitness_hist.png
:width: 300 px :width: 600 px
History of fitness (``maxabsvalue``) value. History of fitness metric (``maxabsvalue``) value.
.. figure:: images/user_libs/taguchi_parameter_hist.png .. figure:: images/user_libs/taguchi_parameter_hist.png
:width: 300 px :width: 600 px
History of values of parameters, ``resinner``, ``resmiddle``, and ``resouter``. History of values of parameters, ``resinner``, ``resmiddle``, and ``resouter``.
The optimisation process terminated because succcessive fitness values were within 0.1% of one another. The optimisation process terminated after 4 iterations because succcessive fitness values were within 0.1% of one another. A maximum absolute amplitude value of 5.7 V/m was achieved when the three resistors had values of 0.1 :math:`\Omega`.