# 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
from fastga.models.performances.mission.mission_components import (
POINTS_NB_CLIMB,
POINTS_NB_CRUISE,
POINTS_NB_DESCENT,
)
[docs]class InitializeAltitude(om.ExplicitComponent):
"""Intializes the altitude at each time step."""
[docs] def initialize(self):
self.options.declare(
"number_of_points", default=1, desc="number of equilibrium to be treated"
)
[docs] def setup(self):
number_of_points = self.options["number_of_points"]
self.add_input("data:mission:sizing:main_route:cruise:altitude", val=np.nan, units="m")
self.add_output("altitude", shape=number_of_points, units="m")
[docs] def compute(self, inputs, outputs, discrete_inputs=None, discrete_outputs=None):
cruise_altitude = inputs["data:mission:sizing:main_route:cruise:altitude"]
altitude_climb = np.linspace(0, cruise_altitude, POINTS_NB_CLIMB)[:, 0]
altitude_cruise = np.full(POINTS_NB_CRUISE, cruise_altitude)
altitude_descent = np.linspace(cruise_altitude, 0.0, POINTS_NB_DESCENT)[:, 0]
altitude = np.concatenate((altitude_climb, altitude_cruise, altitude_descent))
outputs["altitude"] = altitude