# 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/>.
"""Computation of propulsion mass."""
from openmdao import api as om
from fastoad.module_management.service_registry import RegisterSubmodel
from .constants import SERVICE_ENGINE_MASS, SERVICE_FUEL_LINES_MASS, SERVICE_UNCONSUMABLES_MASS
from ..constants import SERVICE_PROPULSION_MASS
[docs]@RegisterSubmodel(SERVICE_PROPULSION_MASS, "fastoad.submodel.weight.mass.propulsion.legacy")
class PropulsionWeight(om.Group):
"""
Computes mass of propulsion.
"""
[docs] def setup(self):
# Engine have to be computed before pylons
self.add_subsystem(
"engines_weight", RegisterSubmodel.get_submodel(SERVICE_ENGINE_MASS), promotes=["*"]
)
self.add_subsystem(
"fuel_lines_weight",
RegisterSubmodel.get_submodel(SERVICE_FUEL_LINES_MASS),
promotes=["*"],
)
self.add_subsystem(
"unconsumables_weight",
RegisterSubmodel.get_submodel(SERVICE_UNCONSUMABLES_MASS),
promotes=["*"],
)
weight_sum = om.AddSubtractComp()
weight_sum.add_equation(
"data:weight:propulsion:mass",
[
"data:weight:propulsion:engine:mass",
"data:weight:propulsion:fuel_lines:mass",
"data:weight:propulsion:unconsumables:mass",
],
units="kg",
desc="Mass of the propulsion system",
)
self.add_subsystem(
"propulsion_weight_sum", weight_sum, promotes=["*"],
)