# ISC License
#
# Copyright (c) 2016, Autonomous Vehicle Systems Lab, University of Colorado at Boulder
#
# Permission to use, copy, modify, and/or distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
#
# Unit Test Script
# Module Name: magneticField - Centered Dipole Model
# Author: Hanspeter Schaub
# Creation Date: March 10, 2019
#
import inspect
import os
import numpy as np
import pytest
filename = inspect.getframeinfo(inspect.currentframe()).filename
path = os.path.dirname(os.path.abspath(filename))
bskName = 'Basilisk'
splitPath = path.split(bskName)
# Import all of the modules that we are going to be called in this simulation
from Basilisk.utilities import SimulationBaseClass
from Basilisk.utilities import unitTestSupport # general support file with common unit test functions
from Basilisk.simulation import magneticFieldCenteredDipole
from Basilisk.architecture import messaging
from Basilisk.utilities import macros
from Basilisk.utilities import orbitalMotion
from Basilisk.utilities import simSetPlanetEnvironment
from Basilisk.utilities import simHelpers
# Uncomment this line is this test is to be skipped in the global unit test run, adjust message as needed.
# @pytest.mark.skipif(conditionstring)
# Uncomment this line if this test has an expected failure, adjust message as needed.
# @pytest.mark.xfail(conditionstring)
# Provide a unique test method name, starting with 'test_'.
# The following 'parametrize' function decorator provides the parameters and expected results for each
# of the multiple test runs for this test.
[docs]
@pytest.mark.parametrize("useDefault", [ True, False])
@pytest.mark.parametrize("useMinReach", [ True, False])
@pytest.mark.parametrize("useMaxReach", [ True, False])
@pytest.mark.parametrize("usePlanetEphemeris", [ True, False])
# update "module" in this function name to reflect the module name
def test_module(show_plots, useDefault, useMinReach, useMaxReach, usePlanetEphemeris):
"""Module Unit Test"""
# each test method requires a single assert method to be called
[testResults, testMessage] = run(show_plots, useDefault, useMinReach, useMaxReach, usePlanetEphemeris)
assert testResults < 1, testMessage
def run(show_plots, useDefault, useMinReach, useMaxReach, usePlanetEphemeris):
testFailCount = 0 # zero unit test result counter
testMessages = [] # create empty array to store test log messages
unitTaskName = "unitTask" # arbitrary name (don't change)
unitProcessName = "TestProcess" # arbitrary name (don't change)
# Create a sim module as an empty container
unitTestSim = SimulationBaseClass.SimBaseClass()
# Create test thread
testProcessRate = macros.sec2nano(0.5) # update process rate update time
testProc = unitTestSim.CreateNewProcess(unitProcessName)
testProc.addTask(unitTestSim.CreateNewTask(unitTaskName, testProcessRate))
# Construct algorithm and associated C++ container
testModule = magneticFieldCenteredDipole.MagneticFieldCenteredDipole()
testModule.ModelTag = "CenteredDipole"
if useDefault:
refg10 = 0.0 # Tesla
refg11 = 0.0 # Tesla
refh11 = 0.0 # Tesla
refPlanetRadius = 0.0 # meters
else:
simSetPlanetEnvironment.centeredDipoleMagField(testModule, "earth")
refg10 = testModule.g10
refg11 = testModule.g11
refh11 = testModule.h11
refPlanetRadius = testModule.planetRadius
minReach = -1.0
if useMinReach:
minReach = (orbitalMotion.REQ_EARTH+300.)*1000.0 # meters
testModule.envMinReach = minReach
maxReach = -1.0
if useMaxReach:
maxReach = (orbitalMotion.REQ_EARTH+100.) # meters
testModule.envMaxReach = maxReach
planetPosition = np.array([0.0, 0.0, 0.0])
refPlanetDCM = np.array(((1, 0, 0), (0, 1, 0), (0, 0, 1)))
if usePlanetEphemeris:
planetStateMsg = messaging.SpicePlanetStateMsgPayload()
planetPosition = [1000.0, 2000.0, -1000.0]
planetStateMsg.PositionVector = planetPosition
refPlanetDCM = np.array(((-1, 0, 0), (0, -1, 0), (0, 0, 1)))
planetStateMsg.J20002Pfix = refPlanetDCM.tolist()
planetMsg = messaging.SpicePlanetStateMsg().write(planetStateMsg)
testModule.planetPosInMsg.subscribeTo(planetMsg)
# add spacecraft to environment model
sc0StateMsg = messaging.SCStatesMsg()
sc1StateMsg = messaging.SCStatesMsg()
testModule.addSpacecraftToModel(sc0StateMsg)
testModule.addSpacecraftToModel(sc1StateMsg)
unitTestSim.AddModelToTask(unitTaskName, testModule)
# define the spacecraft locations
r0 = 6571 * 1000.0 # meters
r1 = 6600 * 1000.0 # meters
#
# setup orbit and simulation time
oe = orbitalMotion.ClassicElements()
mu = 0.3986004415E+15 # meters^3/s^2
oe.a = r0
oe.e = 0.0
oe.i = 45.0 * macros.D2R
oe.Omega = 30.0 * macros.D2R
oe.omega = 120.0 * macros.D2R
oe.f = 0.0 * macros.D2R
r0N, v0N = orbitalMotion.elem2rv(mu, oe)
oe.a = r1
r1N, v1N = orbitalMotion.elem2rv(mu, oe)
# create the input messages
sc0StateMsgData = messaging.SCStatesMsgPayload() # Create a structure for the input message
sc0StateMsgData.r_BN_N = np.array(r0N) + np.array(planetPosition)
sc0StateMsg.write(sc0StateMsgData)
sc1StateMsgData = messaging.SCStatesMsgPayload() # Create a structure for the input message
sc1StateMsgData.r_BN_N = np.array(r1N) + np.array(planetPosition)
sc1StateMsg.write(sc1StateMsgData)
# Setup logging on the test module output message so that we get all the writes to it
dataLog0 = testModule.envOutMsgs[0].recorder()
dataLog1 = testModule.envOutMsgs[1].recorder()
unitTestSim.AddModelToTask(unitTaskName, dataLog0)
unitTestSim.AddModelToTask(unitTaskName, dataLog1)
# Need to call the self-init and cross-init methods
unitTestSim.InitializeSimulation()
# Set the simulation time.
# NOTE: the total simulation time may be longer than this value. The
# simulation is stopped at the next logging event on or after the
# simulation end time.
unitTestSim.ConfigureStopTime(macros.sec2nano(1.0)) # seconds to stop simulation
# Begin the simulation time run set above
unitTestSim.ExecuteSimulation()
# This pulls the actual data log from the simulation run.
mag0Data = dataLog0.magField_N
mag1Data = dataLog1.magField_N
def centeredDipole(pos_N, X, refPlanetRadius, refPlanetDCM, minReach, maxReach):
radius = np.linalg.norm(pos_N)
planetPos_E = refPlanetDCM.dot(pos_N)
rHat_E = planetPos_E/radius
magField_E = (refPlanetRadius/radius)**3 * (3*rHat_E*np.dot(rHat_E, X)-X)
magField_N = [((refPlanetDCM.transpose()).dot(magField_E)).tolist()]*3
if radius < minReach:
magField_N = [[0.0, 0.0, 0.0]]*3
if radius > maxReach and maxReach > 0:
magField_N = [[0.0, 0.0, 0.0]]*3
return magField_N
# compare the module results to the truth values
accuracy = 1e-5
simHelpers.writeTeXSnippet("unitTestToleranceValue", str(accuracy), path)
# check the exponential atmosphere results
#
# check spacecraft 0 neutral density results
if len(mag0Data) > 0:
trueMagField = centeredDipole(r0N, np.array([refg11, refh11, refg10]), refPlanetRadius, refPlanetDCM, minReach, maxReach)
testFailCount, testMessages = unitTestSupport.compareArrayRelative(
trueMagField, mag0Data, accuracy, "SC0 mag vector",
testFailCount, testMessages)
if len(mag1Data) > 0:
trueMagField = centeredDipole(r1N, np.array([refg11, refh11, refg10]), refPlanetRadius, refPlanetDCM, minReach, maxReach)
testFailCount, testMessages = unitTestSupport.compareArrayRelative(
trueMagField, mag1Data, accuracy, "SC1 mag vector",
testFailCount, testMessages)
# print out success or failure message
snippentName = "unitTestPassFail" + str(useDefault) + str(useMinReach) + str(useMaxReach) + str(usePlanetEphemeris)
if testFailCount == 0:
colorText = 'ForestGreen'
print("PASSED: " + testModule.ModelTag)
passedText = r'\textcolor{' + colorText + '}{' + "PASSED" + '}'
else:
colorText = 'Red'
print("Failed: " + testModule.ModelTag)
passedText = r'\textcolor{' + colorText + '}{' + "Failed" + '}'
simHelpers.writeTeXSnippet(snippentName, passedText, path)
# each test method requires a single assert method to be called
# this check below just makes sure no sub-test failures were found
return [testFailCount, ''.join(testMessages)]
#
# This statement below ensures that the unitTestScript can be run as a
# stand-along python script
#
if __name__ == "__main__":
test_module( # update "module" in function name
False, # showplots
False, # useDefault
False, # useMinReach
False, # useMaxReach
True # usePlanetEphemeris
)