.. DO NOT EDIT.
.. THIS FILE WAS AUTOMATICALLY GENERATED BY SPHINX-GALLERY.
.. TO MAKE CHANGES, EDIT THE SOURCE PYTHON FILE:
.. "nesc_test_cases/nesc_case02.py"
.. LINE NUMBERS ARE GIVEN BELOW.
.. only:: html
.. note::
:class: sphx-glr-download-link-note
:ref:`Go to the end <sphx_glr_download_nesc_test_cases_nesc_case02.py>`
to download the full example code.
.. rst-class:: sphx-glr-example-title
.. _sphx_glr_nesc_test_cases_nesc_case02.py:
===================================================
Case 2: Tumbling brick with no damping or drag
===================================================
============== ===============
Verifies Rotational EOMs
Gravitation J2
Geodesy WGS-84 rotating
Atmosphere US 1976 STD
Winds still air
Vehicle Dragless rotating brick
Notes Damping and drag coefficients set to zero
============== ===============
.. GENERATED FROM PYTHON SOURCE LINES 17-36
.. code-block:: Python
from simupy.block_diagram import BlockDiagram
import simupy_flight
import numpy as np
from nesc_testcase_helper import plot_nesc_comparisons, int_opts, benchmark
from nesc_testcase_helper import ft_per_m, kg_per_slug
planet = simupy_flight.Planet(
gravity=simupy_flight.earth_J2_gravity,
winds=simupy_flight.get_constant_winds(),
atmosphere=simupy_flight.get_constant_atmosphere(),
planetodetics=simupy_flight.Planetodetic(
a=simupy_flight.earth_equitorial_radius,
omega_p=simupy_flight.earth_rotation_rate,
f=simupy_flight.earth_f,
),
)
.. GENERATED FROM PYTHON SOURCE LINES 37-38
The inertial forces due to rotation needed to be modeled with a vehicle
.. GENERATED FROM PYTHON SOURCE LINES 38-99
.. code-block:: Python
Ixx = 0.001894220 * kg_per_slug / (ft_per_m**2) # slug-ft2
Iyy = 0.006211019 * kg_per_slug / (ft_per_m**2) # slug-ft2
Izz = 0.007194665 * kg_per_slug / (ft_per_m**2) # slug-ft2
Ixy = 0.0 * kg_per_slug / (ft_per_m**2) # slug-ft2
Iyz = 0.0 * kg_per_slug / (ft_per_m**2) # slug-ft2
Izx = 0.0 * kg_per_slug / (ft_per_m**2) # slug-ft2
m = 0.155404754 * kg_per_slug # slug
x = 0.0
y = 0.0
z = 0.0
vehicle = simupy_flight.Vehicle(
base_aero_coeffs=simupy_flight.get_constant_aero(),
m=m,
I_xx=Ixx,
I_yy=Iyy,
I_zz=Izz,
I_xy=Ixy,
I_yz=Iyz,
I_xz=Izx,
x_com=x,
y_com=y,
z_com=z,
x_mrc=x,
y_mrc=y,
z_mrc=z,
S_A=0.0,
a_l=1.0,
b_l=1.0,
c_l=1.0,
d_l=0.0,
)
BD = BlockDiagram(planet, vehicle)
BD.connect(planet, vehicle, inputs=np.arange(planet.dim_output))
BD.connect(vehicle, planet, inputs=np.arange(vehicle.dim_output))
lat_ic = 0.0 * np.pi / 180
long_ic = 0.0 * np.pi / 180
h_ic = 30_000 / ft_per_m
V_N_ic = 0.0
V_E_ic = 0.0
V_D_ic = 0.0
psi_ic = 0.0 * np.pi / 180
theta_ic = 0.0 * np.pi / 180
phi_ic = 0.0 * np.pi / 180
omega_X_ic = 10.0 * np.pi / 180
omega_Y_ic = 20.0 * np.pi / 180
omega_Z_ic = 30.0 * np.pi / 180
planet.initial_condition = planet.ic_from_planetodetic(
long_ic, lat_ic, h_ic, V_N_ic, V_E_ic, V_D_ic, psi_ic, theta_ic, phi_ic
)
# The specification is for inertial angular rate, not relative
planet.initial_condition[-3:] = omega_X_ic, omega_Y_ic, omega_Z_ic
with benchmark() as b:
res = BD.simulate(30, integrator_options=int_opts)
plot_nesc_comparisons(res, "02")
.. rst-class:: sphx-glr-horizontal
*
.. image-sg:: /nesc_test_cases/images/sphx_glr_nesc_case02_001.png
:alt: nesc case02
:srcset: /nesc_test_cases/images/sphx_glr_nesc_case02_001.png
:class: sphx-glr-multi-img
*
.. image-sg:: /nesc_test_cases/images/sphx_glr_nesc_case02_002.png
:alt: nesc case02
:srcset: /nesc_test_cases/images/sphx_glr_nesc_case02_002.png
:class: sphx-glr-multi-img
*
.. image-sg:: /nesc_test_cases/images/sphx_glr_nesc_case02_003.png
:alt: nesc case02
:srcset: /nesc_test_cases/images/sphx_glr_nesc_case02_003.png
:class: sphx-glr-multi-img
*
.. image-sg:: /nesc_test_cases/images/sphx_glr_nesc_case02_004.png
:alt: nesc case02
:srcset: /nesc_test_cases/images/sphx_glr_nesc_case02_004.png
:class: sphx-glr-multi-img
*
.. image-sg:: /nesc_test_cases/images/sphx_glr_nesc_case02_005.png
:alt: nesc case02
:srcset: /nesc_test_cases/images/sphx_glr_nesc_case02_005.png
:class: sphx-glr-multi-img
*
.. image-sg:: /nesc_test_cases/images/sphx_glr_nesc_case02_006.png
:alt: nesc case02
:srcset: /nesc_test_cases/images/sphx_glr_nesc_case02_006.png
:class: sphx-glr-multi-img
*
.. image-sg:: /nesc_test_cases/images/sphx_glr_nesc_case02_007.png
:alt: nesc case02
:srcset: /nesc_test_cases/images/sphx_glr_nesc_case02_007.png
:class: sphx-glr-multi-img
*
.. image-sg:: /nesc_test_cases/images/sphx_glr_nesc_case02_008.png
:alt: nesc case02
:srcset: /nesc_test_cases/images/sphx_glr_nesc_case02_008.png
:class: sphx-glr-multi-img
*
.. image-sg:: /nesc_test_cases/images/sphx_glr_nesc_case02_009.png
:alt: nesc case02
:srcset: /nesc_test_cases/images/sphx_glr_nesc_case02_009.png
:class: sphx-glr-multi-img
*
.. image-sg:: /nesc_test_cases/images/sphx_glr_nesc_case02_010.png
:alt: nesc case02
:srcset: /nesc_test_cases/images/sphx_glr_nesc_case02_010.png
:class: sphx-glr-multi-img
.. rst-class:: sphx-glr-script-out
.. code-block:: none
/home/runner/work/simupy-flight/simupy-flight/simupy_flight/kinematics.py:198: RuntimeWarning: invalid value encountered in scalar divide
x60 = x6*(2*x26*x54 + x58*(-x13 + x14) + x59*(x33 + x55))/x53
/home/runner/work/simupy-flight/simupy-flight/simupy_flight/dynamics.py:22: RuntimeWarning: divide by zero encountered in scalar divide
x15 = numpy.select([numpy.greater(V_T, 0.0)], [(1/2)/V_T], default=0.0)
/home/runner/work/simupy-flight/simupy-flight/simupy_flight/kinematics.py:198: RuntimeWarning: divide by zero encountered in scalar divide
x60 = x6*(2*x26*x54 + x58*(-x13 + x14) + x59*(x33 + x55))/x53
time to simulate: 1.626 s
.. rst-class:: sphx-glr-timing
**Total running time of the script:** (0 minutes 6.294 seconds)
.. _sphx_glr_download_nesc_test_cases_nesc_case02.py:
.. only:: html
.. container:: sphx-glr-footer sphx-glr-footer-example
.. container:: sphx-glr-download sphx-glr-download-jupyter
:download:`Download Jupyter notebook: nesc_case02.ipynb <nesc_case02.ipynb>`
.. container:: sphx-glr-download sphx-glr-download-python
:download:`Download Python source code: nesc_case02.py <nesc_case02.py>`
.. container:: sphx-glr-download sphx-glr-download-zip
:download:`Download zipped: nesc_case02.zip <nesc_case02.zip>`
.. only:: html
.. rst-class:: sphx-glr-signature
`Gallery generated by Sphinx-Gallery <https://sphinx-gallery.github.io>`_