"""Estimation of global center of gravity."""
# This file is part of FAST-OAD_CS23 : A framework for rapid Overall Aircraft Design
# Copyright (C) 2022 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 fastoad.api as oad
from openmdao.api import Group
from .constants import (
SUBMODEL_AIRCRAFT_X_CG_RATIO,
SUBMODEL_LOADCASE_GROUND_X,
SUBMODEL_LOADCASE_FLIGHT_X,
SUBMODEL_AIRCRAFT_CG_EXTREME,
)
from .max_cg_ratio import ComputeMaxMinCGRatio
[docs]@oad.RegisterSubmodel(SUBMODEL_AIRCRAFT_CG_EXTREME, "fastga.submodel.weight.cg.aircraft.x.legacy")
class ComputeGlobalCG(Group):
# TODO: Document equations. Cite sources
"""Global center of gravity estimation."""
[docs] def initialize(self):
self.options.declare("propulsion_id", default="", types=str)
[docs] def setup(self):
self.add_subsystem(
"cg_ratio_aft",
oad.RegisterSubmodel.get_submodel(SUBMODEL_AIRCRAFT_X_CG_RATIO),
promotes=["*"],
)
self.add_subsystem(
"cg_ratio_lc_ground",
oad.RegisterSubmodel.get_submodel(SUBMODEL_LOADCASE_GROUND_X),
promotes=["*"],
)
propulsion_option = {"propulsion_id": self.options["propulsion_id"]}
self.add_subsystem(
"cg_ratio_lc_flight",
oad.RegisterSubmodel.get_submodel(
SUBMODEL_LOADCASE_FLIGHT_X, options=propulsion_option
),
promotes=["*"],
)
self.add_subsystem("cg_ratio_extrema", ComputeMaxMinCGRatio(), promotes=["*"])