"""Computation of airframe mass."""
# 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 openmdao.api as om
from fastoad.module_management.service_registry import RegisterSubmodel
from .constants import (
SERVICE_EMPENNAGE_MASS,
SERVICE_FLIGHT_CONTROLS_MASS,
SERVICE_FUSELAGE_MASS,
SERVICE_LANDING_GEARS_MASS,
SERVICE_PAINT_MASS,
SERVICE_PYLONS_MASS,
SERVICE_WING_MASS,
)
from ..constants import SERVICE_AIRFRAME_MASS, SERVICE_GUST_LOADS
[docs]@RegisterSubmodel(SERVICE_AIRFRAME_MASS, "fastoad.submodel.weight.mass.airframe.legacy")
class AirframeWeight(om.Group):
"""
Computes mass of airframe.
"""
[docs] def setup(self):
# Airframe
self.add_subsystem(
"loads", RegisterSubmodel.get_submodel(SERVICE_GUST_LOADS), promotes=["*"]
)
self.add_subsystem(
"wing_weight", RegisterSubmodel.get_submodel(SERVICE_WING_MASS), promotes=["*"]
)
self.add_subsystem(
"fuselage_weight", RegisterSubmodel.get_submodel(SERVICE_FUSELAGE_MASS), promotes=["*"],
)
self.add_subsystem(
"empennage_weight",
RegisterSubmodel.get_submodel(SERVICE_EMPENNAGE_MASS),
promotes=["*"],
)
self.add_subsystem(
"flight_controls_weight",
RegisterSubmodel.get_submodel(SERVICE_FLIGHT_CONTROLS_MASS),
promotes=["*"],
)
self.add_subsystem(
"landing_gear_weight",
RegisterSubmodel.get_submodel(SERVICE_LANDING_GEARS_MASS),
promotes=["*"],
)
self.add_subsystem(
"pylons_weight", RegisterSubmodel.get_submodel(SERVICE_PYLONS_MASS), promotes=["*"]
)
self.add_subsystem(
"paint_weight", RegisterSubmodel.get_submodel(SERVICE_PAINT_MASS), promotes=["*"]
)
weight_sum = om.AddSubtractComp()
weight_sum.add_equation(
"data:weight:airframe:mass",
[
"data:weight:airframe:wing:mass",
"data:weight:airframe:fuselage:mass",
"data:weight:airframe:horizontal_tail:mass",
"data:weight:airframe:vertical_tail:mass",
"data:weight:airframe:flight_controls:mass",
"data:weight:airframe:landing_gear:main:mass",
"data:weight:airframe:landing_gear:front:mass",
"data:weight:airframe:pylon:mass",
"data:weight:airframe:paint:mass",
],
units="kg",
desc="Mass of airframe",
)
self.add_subsystem(
"airframe_weight_sum", weight_sum, promotes=["*"],
)