def test_range_transform_floats():
_from = (0.0, 1.0)
to = (20.0, 40.0)
tf = range_transform(_from, to)
assert tf(0.0) == 20.0
assert tf(0.5) == 30.0
assert tf(1.0) == 40.0
def test_range_transform_ints():
_from = (0, 20)
to = (20, 30)
tf = range_transform(_from, to)
assert tf(0) == 20
assert tf(20) == 30
assert tf(10) == 25
def door_position_input(people_waiting, bearing_condition):
"""
It should take from 2 to 30 seconds for the doors to almost close. Remaining
error could be treated as sensor tolerance.
"""
# linear transformation (0,100) -> (2,30)
time_constant = range_transform((0, 100),
(2, 30))(float(bearing_condition))
gain = 10
if people_waiting:
return gain, time_constant, 1
else:
return gain, time_constant, 0
def test_range_tf_should_raise_when_from_not_a_range():
with pytest.raises(ValueError):
range_transform((0, 0), (1, 2))
name='hot_coolant_temp',
start=ambient_temp.start,
fuse_inputs=hct_fi) & (BoundedBy(ambient_temp.min, ambient_temp.max + 15))
cold_coolant_temp = FirstOrder(
human_name="""Temperature of fresh cooling fluid""",
name='cold_coolant_temp',
start=ambient_temp.start,
fuse_inputs=cct_fi) & (BoundedBy(set_point.min - 1, ambient_temp.max))
box_temp = FirstOrder(human_name="""Temperature inside the fridge""",
name='box_temp',
start=ambient_temp.start,
fuse_inputs=bt_fi) & (BoundedBy(cold_coolant_temp.min,
ambient_temp.max))
temp_diff_min = hot_coolant_temp.min - cold_coolant_temp.max
temp_diff_max = hot_coolant_temp.max - cold_coolant_temp.min
gain_from_temp_diff = range_transform((temp_diff_min, temp_diff_max), (0, 0.5))
def ci_fi(cct, hct):
tau = 1
return (1 + gain_from_temp_diff(hct - cct), tau, 1)
current_in = FirstOrder(human_name="""Current drawn from mains""",
name='current_in',
start=0,
fuse_inputs=ci_fi) & (
ResetBy(partial(eq, thermostat_disabled)),
BoundedBy(0, 2),
)