def derive(self,
alt_agl=P('Altitude AGL'),
ias=P('Airspeed'),
airs=S('Airborne'),
pitch_rate=P('Pitch Rate')):
for air in airs:
lows = np.ma.clump_unmasked(
np.ma.masked_greater(alt_agl.array[air.slice],
ROTOR_TRANSITION_ALTITUDE))
for low in lows:
trans_slices = slices_from_to(ias.array[air.slice][low],
ROTOR_TRANSITION_SPEED_LOW,
ROTOR_TRANSITION_SPEED_HIGH,
threshold=1.0)[1]
if trans_slices:
for trans in trans_slices:
base = air.slice.start + low.start
ext_start = int(base + trans.start -
20 * ias.frequency)
if alt_agl.array[ext_start] == 0.0:
trans_start = index_at_value(
ias.array,
0.0,
_slice=slice(base + trans.start, ext_start,
-1),
endpoint='first_closing')
else:
trans_start = np.ma.argmin(
pitch_rate.array[ext_start:base +
trans.start]) + ext_start
self.create_phase(slice(trans_start,
trans.stop + base))
def derive(self, alt_agl=P('Altitude AGL'),
ias=P('Airspeed'),
airs=S('Airborne'),
pitch_rate=P('Pitch Rate')):
for air in airs:
trans_slices = slices_from_to(ias.array[air.slice],
ROTOR_TRANSITION_SPEED_HIGH,
ROTOR_TRANSITION_SPEED_LOW,
threshold=1.0)[1]
if trans_slices:
for trans in shift_slices(trans_slices, air.slice.start):
trans_end = index_at_value(ias.array, 0.0,
_slice=slice(trans.stop, trans.stop+20*ias.frequency),
endpoint='first_closing')
self.create_phase(slice(trans.start, trans_end+1))
def derive(self,
alt_agl=P('Altitude AGL'),
ias=P('Airspeed'),
airs=S('Airborne'),
pitch_rate=P('Pitch Rate')):
for air in airs:
trans_slices = slices_from_to(ias.array[air.slice],
ROTOR_TRANSITION_SPEED_HIGH,
ROTOR_TRANSITION_SPEED_LOW,
threshold=1.0)[1]
if trans_slices:
for trans in shift_slices(trans_slices, air.slice.start):
trans_end = index_at_value(
ias.array,
0.0,
_slice=slice(trans.stop,
trans.stop + 20 * ias.frequency),
endpoint='first_closing')
self.create_phase(slice(trans.start, trans_end + 1))
def derive(self, alt_agl=P('Altitude AGL'),
ias=P('Airspeed'),
airs=S('Airborne'),
pitch_rate=P('Pitch Rate')):
for air in airs:
lows = np.ma.clump_unmasked(np.ma.masked_greater(alt_agl.array[air.slice],
ROTOR_TRANSITION_ALTITUDE))
for low in lows:
trans_slices = slices_from_to(ias.array[air.slice][low],
ROTOR_TRANSITION_SPEED_LOW,
ROTOR_TRANSITION_SPEED_HIGH,
threshold=1.0)[1]
if trans_slices:
for trans in trans_slices:
base = air.slice.start + low.start
ext_start = int(base + trans.start - 20*ias.frequency)
if alt_agl.array[ext_start]==0.0:
trans_start = index_at_value(ias.array, 0.0,
_slice=slice(base+trans.start, ext_start, -1),
endpoint='first_closing')
else:
trans_start = np.ma.argmin(pitch_rate.array[ext_start:base+trans.start]) + ext_start
self.create_phase(slice(trans_start, trans.stop+base))