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[report] | ||
exclude_also= | ||
; Don't complain about exceptions or warnings not being covered by tests | ||
warnings.warn* |
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.. _compareflights: | ||
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CompareFlights | ||
================ | ||
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.. autoclass:: rocketpy.plots.compare.CompareFlights | ||
:members: |
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Compare Flights | ||
=============== | ||
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This example demonstrates how to use the rocketpy ``CompareFlights`` class. | ||
This class has many applications, including the comparison of different flight | ||
setups for a single rocket, the simulation of deployable systems, and the | ||
multi-stage rocket analysis. | ||
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Importing classes | ||
----------------- | ||
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We will start by importing the necessary classes and modules: | ||
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.. jupyter-execute:: | ||
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from rocketpy.plots.compare import CompareFlights | ||
from rocketpy import Environment, Flight, Rocket, SolidMotor | ||
from datetime import datetime, timedelta | ||
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Create Environment, Motor and Rocket | ||
------------------------------------ | ||
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First, let's create the environment, motor and rocket objects. | ||
This is done following the same steps as in the :ref:`firstsimulation` example. | ||
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.. jupyter-execute:: | ||
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after_tomorrow = datetime.now() + timedelta(days=2) | ||
env = Environment(latitude=-23, longitude=-49, date=after_tomorrow) | ||
env.set_atmospheric_model(type="Forecast", file="GFS") | ||
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cesaroni_motor = SolidMotor( | ||
thrust_source="../data/motors/Cesaroni_M1670.eng", | ||
dry_mass=1.815, | ||
dry_inertia=(0.125, 0.125, 0.002), | ||
nozzle_radius=33 / 1000, | ||
grain_number=5, | ||
grain_density=1815, | ||
grain_outer_radius=33 / 1000, | ||
grain_initial_inner_radius=15 / 1000, | ||
grain_initial_height=120 / 1000, | ||
grain_separation=5 / 1000, | ||
grains_center_of_mass_position=0.397, | ||
center_of_dry_mass_position=0.317, | ||
nozzle_position=0, | ||
burn_time=3.9, | ||
throat_radius=11 / 1000, | ||
coordinate_system_orientation="nozzle_to_combustion_chamber", | ||
) | ||
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calisto = Rocket( | ||
radius=127 / 2000, | ||
mass=14.426, | ||
inertia=(6.321, 6.321, 0.034), | ||
power_off_drag="../data/calisto/powerOffDragCurve.csv", | ||
power_on_drag="../data/calisto/powerOnDragCurve.csv", | ||
center_of_mass_without_motor=0, | ||
coordinate_system_orientation="tail_to_nose", | ||
) | ||
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calisto.set_rail_buttons( | ||
upper_button_position=0.0818, | ||
lower_button_position=-0.618, | ||
angular_position=45, | ||
) | ||
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calisto.add_motor(cesaroni_motor, position=-1.255) | ||
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nosecone = calisto.add_nose(length=0.55829, kind="vonKarman", position=1.278) | ||
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fin_set = calisto.add_trapezoidal_fins( | ||
n=4, | ||
root_chord=0.120, | ||
tip_chord=0.060, | ||
span=0.110, | ||
position=-1.04956, | ||
cant_angle=0.5, | ||
airfoil=("../data/calisto/NACA0012-radians.csv", "radians"), | ||
) | ||
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tail = calisto.add_tail( | ||
top_radius=0.0635, bottom_radius=0.0435, length=0.060, position=-1.194656 | ||
) | ||
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main_chute = calisto.add_parachute( | ||
"Main", | ||
cd_s=10.0, | ||
trigger=800, | ||
sampling_rate=105, | ||
lag=1.5, | ||
noise=(0, 8.3, 0.5), | ||
) | ||
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drogue_chute = calisto.add_parachute( | ||
"Drogue", | ||
cd_s=1.0, | ||
trigger="apogee", | ||
sampling_rate=105, | ||
lag=1.5, | ||
noise=(0, 8.3, 0.5), | ||
) | ||
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Creating the Flight objects | ||
--------------------------- | ||
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Now we can create different flights varying the launch angle and the rail inclination: | ||
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.. jupyter-execute:: | ||
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inclinations = [85, 75] | ||
headings = [90, 135] | ||
flights = [] | ||
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for heading in headings: | ||
for inclination in inclinations: | ||
flight = Flight( | ||
environment=env, | ||
rocket=calisto, | ||
rail_length=5.2, | ||
inclination=inclination, | ||
heading=heading, | ||
name=f"Incl {inclination} Head {heading}", | ||
) | ||
flights.append(flight) | ||
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We can easily visualize the number of flights created: | ||
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.. jupyter-execute:: | ||
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print("Number of flights: ", len(flights)) | ||
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Start the comparison | ||
-------------------- | ||
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It is easy to initialize the ``CompareFlights`` object: | ||
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.. jupyter-execute:: | ||
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comparison = CompareFlights(flights) | ||
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After the initialization, we can use different methods to plot the results in a comparative way. | ||
To see a full description of the available methods, you can check the :ref:`compareflights` documentation. | ||
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Plotting results one by one | ||
---------------------------- | ||
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The flights results are divided into different methods, so we can plot them one by one. | ||
This is practical when we want to focus on a specific aspect of the flights. | ||
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.. jupyter-execute:: | ||
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comparison.trajectories_3d(legend=True) | ||
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.. jupyter-execute:: | ||
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comparison.positions() | ||
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.. jupyter-execute:: | ||
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comparison.trajectories_2d(plane="xy", legend=True) | ||
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.. jupyter-execute:: | ||
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comparison.velocities() | ||
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.. jupyter-execute:: | ||
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comparison.stream_velocities() | ||
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.. jupyter-execute:: | ||
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comparison.accelerations() | ||
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.. jupyter-execute:: | ||
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comparison.angular_velocities() | ||
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.. jupyter-execute:: | ||
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comparison.angular_accelerations() | ||
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.. jupyter-execute:: | ||
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comparison.attitude_angles() | ||
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.. jupyter-execute:: | ||
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comparison.euler_angles() | ||
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.. jupyter-execute:: | ||
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comparison.quaternions() | ||
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.. jupyter-execute:: | ||
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comparison.angles_of_attack() | ||
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.. jupyter-execute:: | ||
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comparison.aerodynamic_forces() | ||
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.. jupyter-execute:: | ||
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comparison.aerodynamic_moments() | ||
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.. jupyter-execute:: | ||
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comparison.fluid_mechanics() | ||
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.. jupyter-execute:: | ||
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comparison.energies() | ||
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.. jupyter-execute:: | ||
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comparison.powers() | ||
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Plotting using the ``all`` method | ||
--------------------------------- | ||
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Alternatively, we can plot the results altogether by calling one simple method: | ||
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.. jupyter-execute:: | ||
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comparison.all() |
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