#
# 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.
#
r"""
Overview
--------
This scenario only performs the pointing component to the OpNav FSW stack.
It uses the Limb-based method to identify the planet center.
More details can be found in Chapter 2 of `Thibaud Teil's PhD thesis <http://hanspeterschaub.info/Papers/grads/ThibaudTeil.pdf>`_.
The script can be run at full length by calling::
python3 scenario_OpNavPointLimb.py
"""
# Import utilities
from Basilisk.utilities import orbitalMotion, macros, unitTestSupport
from Basilisk.utilities import RigidBodyKinematics as rbk
# Get current file path
import sys, os, inspect, time, subprocess, signal
filename = inspect.getframeinfo(inspect.currentframe()).filename
path = os.path.dirname(os.path.abspath(filename))
# Import master classes: simulation base class and scenario base class
sys.path.append(path + '/..')
from BSK_OpNav import BSKSim, BSKScenario
import BSK_OpNavDynamics, BSK_OpNavFsw
import numpy as np
from sys import platform
# Import plotting file for your scenario
sys.path.append(path + '/../plottingOpNav')
import OpNav_Plotting as BSK_plt
# Create your own scenario child class
[docs]class scenario_OpNav(BSKScenario):
"""Main Simulation Class"""
def __init__(self, masterSim, showPlots=False):
super(scenario_OpNav, self).__init__(masterSim, showPlots)
self.name = 'scenario_opnav'
self.masterSim = masterSim
self.filterUse = "bias" #"relOD"
[docs] def log_outputs(self):
print('%s: log_outputs' % self.name)
# Dynamics process outputs: log messages below if desired.
# FSW process outputs
samplingTime = self.masterSim.get_FswModel().processTasksTimeStep
# self.masterSim.TotalSim.logThisMessage(self.masterSim.get_FswModel().trackingErrorCamData.outputDataName, samplingTime)
self.masterSim.TotalSim.logThisMessage(self.masterSim.get_FswModel().pixelLineData.opNavOutMsgName, samplingTime)
self.masterSim.TotalSim.logThisMessage(self.masterSim.get_FswModel().opNavPointData.attGuidanceOutMsgName, samplingTime)
self.masterSim.TotalSim.logThisMessage(self.masterSim.get_DynModel().scObject.scStateOutMsgName,samplingTime)
self.masterSim.TotalSim.logThisMessage(self.masterSim.get_FswModel().imageProcessing.opnavCirclesOutMsgName, samplingTime)
self.masterSim.TotalSim.logThisMessage(self.masterSim.get_FswModel().rwMotorTorqueData.outputDataName, samplingTime)
rwOutName = ["RWStateEffector_rw_config_0_data", "RWStateEffector_rw_config_1_data",
"RWStateEffector_rw_config_2_data", "RWStateEffector_rw_config_3_data"]
for item in rwOutName:
self.masterSim.TotalSim.logThisMessage(item, samplingTime)
return
[docs] def pull_outputs(self, showPlots):
print('%s: pull_outputs' % self.name)
# Dynamics process outputs: pull log messages below if any
# Lr = self.masterSim.pullMessageLogData(self.masterSim.get_FswModel().mrpFeedbackControlData.outputDataName + ".torqueRequestBody", range(3))
## Spacecraft true states
position_N = self.masterSim.pullMessageLogData(
self.masterSim.get_DynModel().scObject.scStateOutMsgName + ".r_BN_N", range(3))
velocity_N = self.masterSim.pullMessageLogData(
self.masterSim.get_DynModel().scObject.scStateOutMsgName + ".v_BN_N", range(3))
## Attitude
sigma_BN = self.masterSim.pullMessageLogData(
self.masterSim.get_DynModel().scObject.scStateOutMsgName + ".sigma_BN", range(3))
## Image processing
# circleCenters = self.masterSim.pullMessageLogData(
# self.masterSim.get_FswModel().imageProcessing.opnavCirclesOutMsgName+ ".circlesCenters", range(2*10))
circleRadii = self.masterSim.pullMessageLogData(
self.masterSim.get_FswModel().imageProcessing.opnavCirclesOutMsgName+ ".circlesRadii", range(10))
validCircle = self.masterSim.pullMessageLogData(
self.masterSim.get_FswModel().imageProcessing.opnavCirclesOutMsgName+ ".valid", range(1))
# sigma_RN = self.masterSim.pullMessageLogData(
# self.masterSim.get_FswModel().opNavPointData.attGuidanceOutMsgName + ".sigma_RN", list(range(3)))
# omega_RN_N = self.masterSim.pullMessageLogData(
# self.masterSim.get_FswModel().opNavPointData.attGuidanceOutMsgName + ".omega_RN_B", list(range(3)))
sigma_BR = self.masterSim.pullMessageLogData(
self.masterSim.get_FswModel().trackingErrorCamData.outputDataName + ".sigma_BR", list(range(3)))
omega_BR_B = self.masterSim.pullMessageLogData(
self.masterSim.get_FswModel().trackingErrorCamData.outputDataName + ".omega_BR_B", list(range(3)))
numRW = 4
dataUsReq = self.masterSim.pullMessageLogData(self.masterSim.get_FswModel().rwMotorTorqueData.outputDataName + ".motorTorque", list(range(numRW)))
rwOutName = ["RWStateEffector_rw_config_0_data", "RWStateEffector_rw_config_1_data",
"RWStateEffector_rw_config_2_data", "RWStateEffector_rw_config_3_data"]
dataRW = []
for i in range(0, numRW):
dataRW.append(self.masterSim.pullMessageLogData(rwOutName[i] + ".u_current", list(range(1))))
measPos = self.masterSim.pullMessageLogData(
self.masterSim.get_FswModel().pixelLineData.opNavOutMsgName + ".r_BN_N", range(3))
r_C = self.masterSim.pullMessageLogData(
self.masterSim.get_FswModel().pixelLineData.opNavOutMsgName + ".r_BN_C", range(3))
measCovar = self.masterSim.pullMessageLogData(
self.masterSim.get_FswModel().pixelLineData.opNavOutMsgName + ".covar_N", range(3*3))
covar_C = self.masterSim.pullMessageLogData(
self.masterSim.get_FswModel().pixelLineData.opNavOutMsgName + ".covar_C", range(3*3))
sigma_CB = self.masterSim.get_DynModel().cameraMRP_CB
sizeMM = self.masterSim.get_DynModel().cameraSize
sizeOfCam = self.masterSim.get_DynModel().cameraRez
focal = self.masterSim.get_DynModel().cameraFocal #in m
pixelSize = []
pixelSize.append(sizeMM[0] / sizeOfCam[0])
pixelSize.append(sizeMM[1] / sizeOfCam[1])
dcm_CB = rbk.MRP2C(sigma_CB)
# Plot results
BSK_plt.clear_all_plots()
# pixCovar = np.ones([len(circleCenters[:,0]), 3*3+1])
# pixCovar[:,0] = circleCenters[:,0]
# pixCovar[:,1:]*=np.array([1,0,0,0,1,0,0,0,2])
measError = np.full([len(measPos[:,0]), 4], np.nan)
measError[:,0] = measPos[:,0]
measError_C = np.full([len(measPos[:,0]), 5], np.nan)
measError_C[:,0] = measPos[:,0]
# trueRhat_C = np.full([len(circleCenters[:,0]), 4], np.nan)
# trueCircles = np.full([len(circleCenters[:,0]), 4], np.nan)
# trueCircles[:,0] = circleCenters[:,0]
# trueRhat_C[:,0] = circleCenters[:,0]
# centerBias = np.copy(circleCenters)
# radBias = np.copy(circleRadii)
# ModeIdx = 0
# Rmars = 3396.19*1E3
# for j in range(len(position_N[:, 0])):
# if position_N[j, 0] in circleCenters[:, 0]:
# ModeIdx = j
# break
# for i in range(len(circleCenters[:,0])):
# if circleCenters[i,1:].any() > 1E-8 or circleCenters[i,1:].any() < -1E-8:
# trueRhat_C[i,1:] = np.dot(np.dot(dcm_CB, rbk.MRP2C(sigma_BN[ModeIdx+i , 1:4])) ,position_N[ModeIdx+i, 1:4])/np.linalg.norm(position_N[ModeIdx+i, 1:4])
# trueCircles[i,3] = focal*np.tan(np.arcsin(Rmars/np.linalg.norm(position_N[ModeIdx+i,1:4])))/pixelSize[0]
# trueRhat_C[i,1:] *= focal/trueRhat_C[i,3]
# trueCircles[i, 1] = trueRhat_C[i, 1] / pixelSize[0] + sizeOfCam[0]/2 - 0.5
# trueCircles[i, 2] = trueRhat_C[i, 2] / pixelSize[1] + sizeOfCam[1]/2 - 0.5
#
# measError[i, 1:4] = position_N[ModeIdx+i, 1:4] - measPos[i, 1:4]
# measError_C[i, 4] = np.linalg.norm(position_N[ModeIdx+i, 1:4]) - np.linalg.norm(r_C[i, 1:4])
# measError_C[i, 1:4] = trueRhat_C[i,1:] - r_C[i, 1:4]/np.linalg.norm(r_C[i, 1:4])
# else:
# measCovar[i,1:] = np.full(3*3, np.nan)
# covar_C[i, 1:] = np.full(3 * 3, np.nan)
timeData = position_N[:, 0] * macros.NANO2MIN
# BSK_plt.AnimatedScatter(sizeOfCam, circleCenters, circleRadii, validCircle)
# BSK_plt.plot_cirlces(timeData[switchIdx:], circleCenters, circleRadii, validCircle, sizeOfCam)
BSK_plt.plot_rw_motor_torque(timeData, dataUsReq, dataRW, numRW)
BSK_plt.plot_attitude_error(timeData, sigma_BR)
BSK_plt.plot_rate_error(timeData, omega_BR_B)
# BSK_plt.imgProcVsExp(trueCircles, circleCenters, circleRadii, np.array(sizeOfCam))
# BSK_plt.centerXY(circleCenters, np.array(sizeOfCam))
figureList = {}
if showPlots:
BSK_plt.show_all_plots()
else:
fileName = os.path.basename(os.path.splitext(__file__)[0])
figureNames = ["attitudeErrorNorm", "rwMotorTorque", "rateError", "rwSpeed"]
figureList = BSK_plt.save_all_plots(fileName, figureNames)
return figureList
def run(showPlots, simTime = None):
# Instantiate base simulation
TheBSKSim = BSKSim(fswRate=0.5, dynRate=0.5)
TheBSKSim.set_DynModel(BSK_OpNavDynamics)
TheBSKSim.set_FswModel(BSK_OpNavFsw)
TheBSKSim.initInterfaces()
# Configure a scenario in the base simulation
TheScenario = scenario_OpNav(TheBSKSim, showPlots)
if showPlots:
TheScenario.log_outputs()
TheScenario.configure_initial_conditions()
TheBSKSim.get_DynModel().cameraMod.saveImages = 0
# opNavMode 1 is used for viewing the spacecraft as it navigates, opNavMode 2 is for headless camera simulation
TheBSKSim.get_DynModel().vizInterface.opNavMode = 2
# The following code spawns the Vizard application from python
mode = ["None", "-directComm", "-opNavMode"]
TheScenario.run_vizard(mode[TheBSKSim.get_DynModel().vizInterface.opNavMode])
# Configure FSW mode
TheScenario.masterSim.modeRequest = 'prepOpNav'
# Initialize simulation
TheBSKSim.InitializeSimulationAndDiscover()
# Configure run time and execute simulation
simulationTime = macros.min2nano(5.)
TheBSKSim.ConfigureStopTime(simulationTime)
print('Starting Execution')
t1 = time.time()
TheBSKSim.ExecuteSimulation()
TheScenario.masterSim.modeRequest = 'pointLimb'
if simTime != None:
simulationTime = macros.min2nano(simTime)
else:
simulationTime = macros.min2nano(200.)
TheBSKSim.ConfigureStopTime(simulationTime)
TheBSKSim.ExecuteSimulation()
t2 = time.time()
print('Finished Execution in ', t2-t1, ' seconds. Post-processing results')
# Terminate vizard and show plots
TheScenario.end_scenario()
if __name__ == "__main__":
run(True)