"""
Main component for mass breakdown
"""
# This file is part of FAST-OAD : A framework for rapid Overall Aircraft Design
# Copyright (C) 2021 ONERA & ISAE-SUPAERO
# FAST is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
import numpy as np
from openmdao.core.explicitcomponent import ExplicitComponent
[docs]class UpdateMLWandMZFW(ExplicitComponent):
"""
Computes Maximum Landing Weight and Maximum Zero Fuel Weight from
Overall Empty Weight and Maximum Payload.
"""
[docs] def setup(self):
self.add_input("data:weight:aircraft:OWE", val=np.nan, units="kg")
self.add_input("data:weight:aircraft:max_payload", val=np.nan, units="kg")
self.add_output("data:weight:aircraft:MZFW", units="kg")
self.add_output("data:weight:aircraft:MLW", units="kg")
[docs] def setup_partials(self):
self.declare_partials("*", "*", method="fd")
[docs] def compute(self, inputs, outputs, discrete_inputs=None, discrete_outputs=None):
owe = inputs["data:weight:aircraft:OWE"][0]
max_pl = inputs["data:weight:aircraft:max_payload"][0]
mzfw = owe + max_pl
mlw = 1.06 * mzfw
outputs["data:weight:aircraft:MZFW"] = mzfw
outputs["data:weight:aircraft:MLW"] = mlw