"""Computation of the systems mass."""
# 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 numpy as np
import openmdao.api as om
import fastoad.api as oad
from fastga.models.weight.mass_breakdown.c_systems.constants import (
SERVICE_POWER_SYSTEM_MASS,
SERVICE_LIFE_SUPPORT_SYSTEM_MASS,
SERVICE_AVIONICS_SYSTEM_MASS,
SERVICE_RECORDING_SYSTEM_MASS,
)
from fastga.models.weight.mass_breakdown.constants import SERVICE_SYSTEMS_MASS
[docs]
@oad.RegisterSubmodel(SERVICE_SYSTEMS_MASS, "fastga_he.submodel.weight.mass.systems.weight_nan")
class SystemsWeight(om.Group):
"""Computes mass of systems by summing the contribution of each systems, sets the default
value at nan contrarily to the legacy submodel."""
[docs]
def setup(self):
self.add_subsystem(
"navigation_systems_weight",
oad.RegisterSubmodel.get_submodel(SERVICE_AVIONICS_SYSTEM_MASS),
promotes=["*"],
)
self.add_subsystem(
"power_systems_weight",
oad.RegisterSubmodel.get_submodel(SERVICE_POWER_SYSTEM_MASS),
promotes=["*"],
)
self.add_subsystem(
"life_support_systems_weight",
oad.RegisterSubmodel.get_submodel(SERVICE_LIFE_SUPPORT_SYSTEM_MASS),
promotes=["*"],
)
self.add_subsystem(
"recording_systems_weight",
oad.RegisterSubmodel.get_submodel(SERVICE_RECORDING_SYSTEM_MASS),
promotes=["*"],
)
self.add_subsystem("systems_weight_sum", SystemsWeightSum(), promotes=["*"])
[docs]
class SystemsWeightSum(om.ExplicitComponent):
[docs]
def setup(self):
self.add_input("data:weight:systems:power:electric_systems:mass", val=np.nan, units="kg")
self.add_input("data:weight:systems:power:hydraulic_systems:mass", val=np.nan, units="kg")
self.add_input(
"data:weight:systems:life_support:air_conditioning:mass", val=np.nan, units="kg"
)
self.add_input("data:weight:systems:life_support:insulation:mass", val=np.nan, units="kg")
self.add_input("data:weight:systems:life_support:de_icing:mass", val=np.nan, units="kg")
self.add_input(
"data:weight:systems:life_support:internal_lighting:mass", val=np.nan, units="kg"
)
self.add_input(
"data:weight:systems:life_support:seat_installation:mass", val=np.nan, units="kg"
)
self.add_input("data:weight:systems:life_support:fixed_oxygen:mass", val=np.nan, units="kg")
self.add_input(
"data:weight:systems:life_support:security_kits:mass", val=np.nan, units="kg"
)
self.add_input("data:weight:systems:avionics:mass", val=np.nan, units="kg")
self.add_input("data:weight:systems:recording:mass", val=np.nan, units="kg")
self.add_output(
"data:weight:systems:mass", units="kg", desc="Mass of aircraft systems", val=0.0
)
self.declare_partials(of="*", wrt="*", val=1.0)
[docs]
def compute(self, inputs, outputs, discrete_inputs=None, discrete_outputs=None):
outputs["data:weight:systems:mass"] = np.sum(inputs.values())