wltp 0.0.7-alpha

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wltp: A *wltc* gear-shifts calculator
#####################################
:Home: https://github.com/ankostis/wltp
:Documentation: https://wltp.readthedocs.org/
:Copyright: 2013-2014 European Commission (JRC)
:License: `EUPL 1.1+ <https://joinup.ec.europa.eu/software/page/eupl>`_


A calculator of the gear-shifts profile for light-duty-vehicles (cars)
according to UN's draft on the
`Worldwide harmonized Light vehicles Test Procedures <https://en.wikipedia.org/wiki/Worldwide_harmonized_Light_vehicles_Test_Procedures>`_.

.. important:: This simulator is still in *alpha* stage.
The difference of the results from the specs are described in the :doc:`CHANGES.rst`.


Overview
========

It accepts as input the vehicle-specifications and parameters for modifying the execution
of the WLTC-cycle and spits-out the it gear-shifts of the vehicle, the attained speed-profile,
and any warnings. It certainly does not calculate any CO2 emissions or other metrics.


An "execution" or a "run" of an experiment is depicted in the following diagram::


.-------------------. ______________ .-------------------.
/ Model / | Experiment | / Model(augmented) /
/-------------------/ |--------------| /-------------------/
/ +--vehicle / ==> | .----------.| ==> / +... /
/ +--params / | / WLTC-data/ | / +--cycle_run /
/ / |'----------' | / /
'------------------' |______________| '-------------------'


Install
=======
Requires Python 3.3+.
Install it directly from the `PyPI <https://pypi.python.org/pypi>`_ repository with the usual::

$ pip3 install wltc

Or assuming you have download the sources::

$ python setup.py install


.. Seealso:: `WinPython <http://winpython.sourceforge.net/>`_



Cmd-line usage
==============
:TODO: Not implemented in this vesion

To get help::

$ python wltc --help ## to get generic help for cmd-line syntax
$ python wltc -M /vehicle ## to get help for specific model-paths


and then, assuming ``vehicle.csv`` is a CSV file with the vehicle parameters
for which you want to override the ``n_idle`` only, run the following::

$ python wltc -v \
-I vehicle.csv file_frmt=SERIES model_path=/params header@=None \
-m /vehicle/n_idle:=850 \
-O cycle.csv model_path=/cycle_run



Python Usage
============
A usage example::

>> import wltc

>> model = {
"vehicle": {
"mass": 1500,
"v_max": 195,
"p_rated": 100,
"n_rated": 5450,
"n_idle": 950,
"n_min": None, # Can be overriden by manufacturer.
"gear_ratios": [120.5, 75, 50, 43, 37, 32],
"resistance_coeffs":[100, 0.5, 0.04],
}
}

>> experiment = wltc.Experiment(model)

>> model = experiment.run()

>> print(model['params'])
>> print(model['cycle_run'])
>> print(Experiment.driveability_report())



>> {
'wltc_class': 'class3b'
'v_class': [ 0., 0., 0., ..., 0., 0., 0.],
'f_downscale': 0,
'v_target': [ 0., 0., 0., ..., 0., 0., 0.],
'gears': [0, 0, 0, ..., 0, 0, 0],
'clutch': array([ True, True, True, ..., True, True, True], dtype=bool),
'v_real': [ 0., 0., 0., ..., 0., 0., 0.],
'driveability': {...},
}


For information on the model-data, check the schema::

>> print(wltc.model.model_schema())


For more examples, download the sources and check the test-cases
found at ``/wltp/test``.



Contribute
==========
:Issue Tracker: https://github.com/ankostis/wltp/issues
:Source Code: https://github.com/ankostis/wltp

.. Seealso:: :doc:`INSTALL.rst`



Contributors
============
* Steven Heinz for his test-data and the cooperation on the tricky parts of the specification.
* Giorgos Fontaras for physics, policy and admin support.
* Kostis Anagnostopoulos, author.



History
=======
Implemented from scratch based on the UN's specs (document also included in the `docs` dir):

* http://www.unece.org/trans/main/wp29/wp29wgs/wp29grpe/grpedoc_2013.html
* https://www2.unece.org/wiki/pages/viewpage.action?pageId=2523179
* But probably a better spec is this one:
https://www2.unece.org/wiki/display/trans/DHC+draft+technical+report

.. Seealso:: :doc:`CHANGES.rst`