def testCompareDownscaleMethodWithSpecs(self):
from matplotlib import pyplot as plt
'''Compare downcalings with the both methods: simplified (scale by multiply) and by_the_spec (iterativelly scale accelerations).'''
dtp = np.float64
wltc = model._get_wltc_data()
wclasses = wltc['classes']
for wclass in wclasses.keys():
for f_downscale in np.arange(0, 4, 0.1):
class_data = wclasses[wclass]
cycle = np.asarray(class_data['cycle'], dtype=dtp)
phases = class_data['downscale']['phases']
V1 = downscaleCycle(cycle, f_downscale, phases)
V2 = downscaleCycle_bySpecs(cycle, f_downscale, phases)
err = np.abs(V1 - V2).max()
print('Class(%s), f_dnscl(%s): %s' %
(wclass, f_downscale, err))
if (not np.allclose(V1, V2)):
print('Class(%s), f_dnscl(%s)' % (wclass, f_downscale))
plt.plot(cycle, 'r')
plt.plot(V1, 'b')
plt.plot(V2, 'g')
plt.show()
raise AssertionError('Class(%s), f_dnscl(%s)' %
(wclass, f_downscale))
def wltp_velocities(downscale_factor, class_velocities, downscale_phases,
times):
"""
Returns the downscaled velocity profile [km/h].
:param downscale_factor:
Velocity downscale factor [-].
:type downscale_factor: float
:param class_velocities:
Class velocity vector [km/h].
:type class_velocities: numpy.array
:param downscale_phases:
Downscale phases [s].
:type downscale_phases: list
:param times:
Time vector [s].
:type times: numpy.array
:return:
Velocity vector [km/h].
:rtype: numpy.array
"""
if downscale_factor > 0:
downscale_phases = np.searchsorted(times, downscale_phases)
v = wltp_exp.downscaleCycle(class_velocities, downscale_factor,
downscale_phases)
else:
v = class_velocities
return v
def testCompareDownscaleMethodWithSpecs(self):
from matplotlib import pyplot as plt
"""Compare downcalings with the both methods: simplified (scale by multiply) and by_the_spec (iterativelly scale accelerations)."""
dtp = np.float64
wltc = model._get_wltc_data()
wclasses = wltc["classes"]
for wclass in wclasses.keys():
for f_downscale in np.arange(0, 4, 0.1):
class_data = wclasses[wclass]
cycle = np.asarray(class_data["cycle"], dtype=dtp)
phases = class_data["downscale"]["phases"]
V1 = downscaleCycle(cycle, f_downscale, phases)
V2 = downscaleCycle_bySpecs(cycle, f_downscale, phases)
err = np.abs(V1 - V2).max()
print("Class(%s), f_dnscl(%s): %s" % (wclass, f_downscale, err))
if not np.allclose(V1, V2):
print("Class(%s), f_dnscl(%s)" % (wclass, f_downscale))
plt.plot(cycle, "r")
plt.plot(V1, "b")
plt.plot(V2, "g")
plt.show()
raise AssertionError("Class(%s), f_dnscl(%s)" % (wclass, f_downscale))
def testFull_manually(self):
logging.getLogger().setLevel(logging.DEBUG)
dtp = np.float64
mass = 1577.3106
p_rated = 78.6340
v_max = 186.4861
f0 = 152.5813
f1 = 307.5789
f2 = 0.0486
f_inertial = 1.1 # constant
## Decide WLTC-class.
#
wltc = model._get_wltc_data()
wltc_class = decideClass(wltc, p_rated / mass, v_max)
class_data = wltc["classes"][wltc_class]
cycle = np.asarray(class_data["cycle"], dtype=dtp)
A = np.diff(cycle)
A = np.append(A, 0) # Restore element lost by diff().
A = A / 3.6
P_REQ = calcPower_required(cycle, A, None, mass, f0, f1, f2, f_inertial)
f_downscale_threshold = 0.01
dsc_data = class_data["downscale"]
phases = dsc_data["phases"]
p_max_values = dsc_data["p_max_values"]
downsc_coeffs = dsc_data["factor_coeffs"]
dsc_v_split = dsc_data.get("v_max_split", None)
f_downscale = calcDownscaleFactor(
P_REQ, p_max_values, downsc_coeffs, dsc_v_split, p_rated, v_max, f_downscale_threshold
)
if f_downscale > 0:
cycle = downscaleCycle(cycle, f_downscale, phases)
def testCompareDownscaleMethodWithSpecs(self):
from matplotlib import pyplot as plt
'''Compare downcalings with the both methods: simplified (scale by multiply) and by_the_spec (iterativelly scale accelerations).'''
dtp = np.float64
wltc = model._get_wltc_data()
wclasses = wltc['classes']
for wclass in wclasses.keys():
for f_downscale in np.arange(0, 4, 0.1):
class_data = wclasses[wclass]
cycle = np.asarray(class_data['cycle'], dtype=dtp)
phases = class_data['downscale']['phases']
V1 = downscaleCycle(cycle, f_downscale, phases)
V2 = downscaleCycle_bySpecs(cycle, f_downscale, phases)
err = np.abs(V1 - V2).max()
print('Class(%s), f_dnscl(%s): %s'%(wclass, f_downscale, err))
if (not np.allclose(V1, V2)):
print('Class(%s), f_dnscl(%s)'%(wclass, f_downscale))
plt.plot(cycle, 'r')
plt.plot(V1, 'b')
plt.plot(V2, 'g')
plt.show()
raise AssertionError('Class(%s), f_dnscl(%s)'%(wclass, f_downscale))
def wltp_velocities(downscale_factor, class_times, class_velocities,
downscale_phases, times):
"""
Returns the downscaled velocity profile [km/h].
:param downscale_factor:
Velocity downscale factor [-].
:type downscale_factor: float
:param class_times:
Class time vector [s].
:type class_times: numpy.array
:param class_velocities:
Class velocity vector [km/h].
:type class_velocities: numpy.array
:param downscale_phases:
Downscale phases [s].
:type downscale_phases: list
:param times:
Time vector [s].
:type times: numpy.array
:return:
Theoretical velocity vector [km/h].
:rtype: numpy.array
"""
if downscale_factor > 0:
from wltp.experiment import downscaleCycle
downscale_phases = np.searchsorted(times, downscale_phases)
v = downscaleCycle(class_velocities, downscale_factor,
downscale_phases)
else:
v = class_velocities
n = int(np.ceil(times[-1] / class_times[-1]))
t = np.cumsum(np.tile(np.ediff1d(class_times, to_begin=[0]), (n, )))
t += class_times[0]
return np.interp(times, t, np.tile(v, (n, )))
def testFull_manually(self):
logging.getLogger().setLevel(logging.DEBUG)
dtp = np.float64
mass = 1577.3106
p_rated = 78.6340
v_max = 186.4861
f0 = 152.5813
f1 = 307.5789
f2 = 0.0486
f_inertial = 1.1 #constant
## Decide WLTC-class.
#
wltc = model._get_wltc_data()
wltc_class = decideClass(wltc, p_rated / mass, v_max)
class_data = wltc['classes'][wltc_class]
cycle = np.asarray(class_data['cycle'], dtype=dtp)
A = np.diff(cycle)
A = np.append(A, 0) # Restore element lost by diff().
A = A / 3.6
P_REQ = calcPower_required(cycle, A, None, mass, f0, f1, f2,
f_inertial)
f_downscale_threshold = 0.01
dsc_data = class_data['downscale']
phases = dsc_data['phases']
p_max_values = dsc_data['p_max_values']
downsc_coeffs = dsc_data['factor_coeffs']
dsc_v_split = dsc_data.get('v_max_split', None)
f_downscale = calcDownscaleFactor(P_REQ, p_max_values, downsc_coeffs,
dsc_v_split, p_rated, v_max,
f_downscale_threshold)
if (f_downscale > 0):
cycle = downscaleCycle(cycle, f_downscale, phases)
