#!/usr/bin/env python
# -*- coding: UTF-8 -*-
#
# Copyright 2015-2019 European Commission (JRC);
# Licensed under the EUPL (the 'Licence');
# You may not use this work except in compliance with the Licence.
# You may obtain a copy of the Licence at: http://ec.europa.eu/idabc/eupl
"""
Functions and `dsp` model to define theoretical profiles of NEDC cycle.
"""
import schedula as sh
from co2mpas.defaults import dfl
dsp = sh.BlueDispatcher(
name='NEDC cycle model',
description='Returns the theoretical times, velocities, and gears of NEDC.'
)
dsp.add_data(
'initial_temperature', dfl.values.initial_temperature_NEDC,
description='Initial temperature of the test cell [°C].'
)
dsp.add_data(
'max_time', dfl.values.max_time_NEDC, 5, description='Maximum time [s].',
)
dsp.add_data('k1', dfl.values.k1)
dsp.add_data('k2', dfl.values.k2)
dsp.add_data('k5', dfl.values.k5, 10)
dsp.add_function(
function_id='set_max_gear_as_default_k5',
function=sh.bypass,
inputs=['max_gear'],
outputs=['k5']
)
[docs]def nedc_gears(times, max_gear, k1=1, k2=2, k5=2):
"""
Returns the gear shifting profile according to NEDC [-].
:param times:
Time vector [s].
:type times: numpy.array
:param max_gear:
Maximum gear of the gear box [-].
:type max_gear: int
:param k1:
K1 NEDC parameter (first or second gear) [-].
:type k1: int
:param k2:
K2 NEDC parameter (first or second gear) [-].
:type k2: int
:param k5:
K5 NEDC parameter (first or second gear) [-].
:type k5: int
:return:
Gear vector [-].
:rtype: numpy.array
"""
from scipy.interpolate import interp1d
eps, parts = 0.01, {}
# part one
parts[0] = parts[1] = parts[2] = parts[3] = (
(0, 0), (6, 0), (6, k1), (11, k1), (11, 1), (25, 1), (25, k1), (28, k1),
(28, 0), (44, 0), (44, k1), (49, k1), (49, 1), (55 - eps, 1),
(55 - eps, 2), (93, 2), (93, k2), (96, k2), (96, 0), (112, 0),
(112, k1), (117, k1), (117, 1), (123 - eps, 1), (123 - eps, 2),
(134 - eps, 2), (134 - eps, 3), (177 - eps, 3), (177 - eps, 2),
(185, 2), (185, k2), (188, k2), (188, 0), (195, 0)
)
# part two
parts[4] = (
(0, k1), (20, k1), (20, 1), (26 - eps, 1), (26 - eps, 2), (37 - eps, 2),
(37 - eps, 3), (47 - eps, 3), (47 - eps, 4), (61, 4), (61, 5), (115, 5),
(115, 4), (201, 4), (201, 5), (286, 5), (286, max_gear),
(370, max_gear), (370, k5), (380, k5), (380, 0), (400, 0)
)
tg = _repeat_parts(times, parts).T
s = interp1d(*tg, kind='nearest', assume_sorted=True)(times)
s[s > max_gear] = max_gear
return s
# noinspection PyUnusedLocal, PyMissingOrEmptyDocstring
[docs]def is_manual(gear_box_type, *args):
return gear_box_type == 'manual'
dsp.add_function(
function_id='nedc_gears',
function=sh.add_args(nedc_gears),
inputs=['gear_box_type', 'times', 'max_gear', 'k1', 'k2', 'k5'],
outputs=['gears'],
input_domain=is_manual
)
def _repeat_parts(times, parts):
import numpy as np
from functools import reduce
it = [v[1] for v in sorted(parts.items())]
def _func(x, y):
y = np.array(y)
y[:, 0] += x[-1][-1][0]
return x + (y,)
tv = np.concatenate(reduce(_func, it[1:], (it[0],)))
n = int(np.ceil(times[-1] / tv[-1][0])) - 1
if n > 0:
tv = np.concatenate(reduce(_func, (tv,) * n, (tv,)))
return tv
[docs]@sh.add_function(dsp, outputs=['velocities'])
def nedc_velocities(times, gear_box_type):
"""
Returns the velocity profile according to NEDC and gear box type [km/h].
:param times:
Time vector [s].
:type times: numpy.array
:param gear_box_type:
Gear box type (manual or automatic or cvt).
:type gear_box_type: str
:return:
Velocity vector [km/h].
:rtype: numpy.array
"""
from numpy import interp
parts = {
'manual':
{
0: (
(0, 0), (11, 0), (15, 15), (23, 15), (25, 10), (28, 0),
(49, 0), (54, 15), (56, 15), (61, 32), (85, 32), (93, 10),
(96, 0), (117, 0), (122, 15), (124, 15), (133, 35),
(135, 35), (143, 50), (155, 50), (163, 35), (176, 35),
(178, 35), (185, 10), (188, 0), (195, 0)
),
4: (
(0, 0), (20, 0), (25, 15), (27, 15), (36, 35), (38, 35),
(46, 50), (48, 50), (61, 70), (111, 70), (119, 50),
(188, 50), (201, 70), (251, 70), (286, 100), (316, 100),
(336, 120), (346, 120), (362, 80), (370, 50), (380, 0),
(400, 0)
)
},
'automatic':
{
0: (
(0, 0), (11, 0), (15, 15), (23, 15), (25, 10), (28, 0),
(49, 0), (61, 32), (85, 32), (93, 10), (96, 0), (117, 0),
(143, 50), (155, 50), (163, 35), (176, 35), (178, 35),
(185, 10), (188, 0), (195, 0)
),
4: (
(0, 0), (20, 0), (61, 70), (111, 70), (119, 50), (188, 50),
(201, 70), (251, 70), (286, 100), (316, 100), (336, 120),
(346, 120), (362, 80), (370, 50), (380, 0), (400, 0)
)
}
}
for k, v in parts.items():
v[1] = v[2] = v[3] = v[0]
parts['cvt'] = parts['planetary'] = parts['automatic']
tv = _repeat_parts(times, parts[gear_box_type])
return interp(times, *tv.T)
