Source code for simIncludeThruster

#
#  ISC License
#
#  Copyright (c) 2016, Autonomous Vehicle Systems Lab, University of Colorado at Boulder
#
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#
#   Simulation Setup Utilities for Thruster devices
#

import sys
from collections import OrderedDict

import numpy
from Basilisk.architecture import messaging
from Basilisk.simulation import thrusterDynamicEffector


[docs]class thrusterFactory(object): """Simulation Thruster Factory Class""" def __init__(self): self.useMinPulseTime = True self.thrusterList = OrderedDict()
[docs] def create(self, thrusterType, r_B, tHat_B, **kwargs): """ This function is called to setup a thruster device in python, and adds it to the of thruster factory in ``thrusterList{}``. The function returns a copy of the device that can be changed if needed. The first 3 arguments are required, the remaining arguments are optional with: Parameters ---------- thrusterType : string thruster manufacturing name.: r_B : list vector with thruster location in B-frame components: tHat_B : list vector with thruster force direction unit vector: kwargs: useMinPulseTime: BOOL flag if the thruster model should use a minimum impulse time areaNozzle: float thruster nozzle exhaust cone exit area steadyIsp: float thruster fuel efficiency in Isp (seconds) MaxThrust: float maximum thruster force in Newtons thrusterMagDisp: float thruster dispersion percentage MinOnTime: float thruster minimum on time cutoffFrequency: float frequency of first-order filter dynamics swirlTorque: float constant momentum from ionic thrusters """ # create the blank thruster object TH = thrusterDynamicEffector.THRSimConfig() # set default thruster values TH.areaNozzle = 0.1 # [m^2] TH.steadyIsp = 100 # [s] TH.MaxThrust = 0.200 # [N] TH.thrusterMagDisp = 0.0 # [%] TH.MinOnTime = 0.020 # [s] TH.cutoffFrequency = 10.0 # [rad/s] TH.MaxSwirlTorque = 0.0 # [Nm] # populate the thruster object with the type specific parameters try: eval('self.' + thrusterType + '(TH)') except: print('ERROR: Thruster type ' + thrusterType + ' is not implemented') exit(1) # set device states from the input arguments. Note that these may override what is set in # the above function call if 'areaNozzle' in kwargs: varAreaNozzle = kwargs['areaNozzle'] if not isinstance(varAreaNozzle, (float)): print('ERROR: areaNozzle must be a float argument') exit(1) else: TH.areaNozzle = varAreaNozzle if 'steadyIsp' in kwargs: varSteadyIsp = kwargs['steadyIsp'] if not isinstance(varSteadyIsp, (float)): print('ERROR: steadyIsp must be a float argument') exit(1) else: TH.steadyIsp = varSteadyIsp if 'MaxThrust' in kwargs: varMaxThrust = kwargs['MaxThrust'] if not isinstance(varMaxThrust, (float)): print('ERROR: MaxThrust must be a float argument') exit(1) else: TH.MaxThrust = varMaxThrust if 'MaxSwirlTorque' in kwargs: varMaxSwirlTorque = kwargs['MaxSwirlTorque'] if not isinstance(varMaxSwirlTorque, (float)): print('ERROR: MaxSwirlTorque must be a float argument') exit(1) else: TH.MaxSwirlTorque = varMaxSwirlTorque if 'thrusterMagDisp' in kwargs: varThrusterMagDisp = kwargs['thrusterMagDisp'] if not isinstance(varMaxThrust, (float)): print('ERROR: varThrusterMagDisp must be a float argument') exit(1) else: TH.thrusterMagDisp = varThrusterMagDisp if 'MinOnTime' in kwargs: varMinOnTime = kwargs['MinOnTime'] if not isinstance(varMinOnTime, (float)): print('ERROR: MinOnTime must be a float argument') exit(1) else: TH.MinOnTime = varMinOnTime if 'cutoffFrequency' in kwargs: varCutoffFrequency = kwargs['cutoffFrequency'] if not isinstance(varCutoffFrequency, (float)): print('ERROR: cutoffFrequency must be a float argument') exit(1) else: TH.cutoffFrequency = varCutoffFrequency if 'useMinPulseTime' in kwargs: varUseMinPulseTime = kwargs['useMinPulseTime'] if not isinstance(varUseMinPulseTime, (bool)): print('ERROR: useMinPulseTime must be a BOOL argument') exit(1) else: varUseMinPulseTime = False # default value if not varUseMinPulseTime: TH.MinOnTime = 0.0 if 'label' in kwargs: varLabel = kwargs['label'] if not isinstance(varLabel, (str)): print('ERROR: TH label must be a string') exit(1) if len(varLabel) > 5: print('ERROR: TH label string is longer than 5 characters') exit(1) else: varLabel = 'TH' + str(len(self.thrusterList) + 1) # default device labeling TH.label = varLabel # set thruster force direction axis norm = numpy.linalg.norm(tHat_B) if norm > 1e-10: tHat_B = tHat_B / norm else: print( 'Error: Thruster ' + sys._getframe().f_code.co_name + ' direction tHat input must be non-zero 3x1 vector') exit(1) TH.thrDir_B = [[tHat_B[0]], [tHat_B[1]], [tHat_B[2]]] # set thruster position vector TH.thrLoc_B = [[r_B[0]], [r_B[1]], [r_B[2]]] # add TH to the list of TH devices self.thrusterList[varLabel] = TH return TH
[docs] def addToSpacecraft(self, modelTag, thEffector, sc): """ This function should be called after all Thruster devices are created with create() It creates the C-class container for the array of TH devices, and attaches this container to the spacecraft object Parameters ---------- modelTag: string module model tag string thEffector: thrusterEffector thruster effector handle sc: spacecraft """ thEffector.ModelTag = modelTag for key, th in list(self.thrusterList.items()): thEffector.addThruster(th) # Check the type of thruster effector thrusterType = str(type(thEffector)) if 'ThrusterDynamicEffector' in thrusterType: sc.addDynamicEffector(thEffector) elif 'ThrusterStateEffector' in thrusterType: sc.addStateEffector(thEffector) else: print("This isn't a thruster effector. You did something wrong.") return
[docs] def getNumOfDevices(self): """ Returns the number of RW devices setup. :return: number of thruster devices """ return len(self.thrusterList)
[docs] def getConfigMessage(self): """ Returns a FSW THRArrayConfigMsg reflecting the current thruster setup. :return: thrMessage """ thrMessage = messaging.THRArrayConfigMsgPayload() i = 0 for simThruster in self.thrusterList.values(): # Converts from THRConfigSimMsg to THRConfigFswMsg fswThruster = messaging.THRConfigMsgPayload() fswThruster.maxThrust = simThruster.MaxThrust fswThruster.rThrust_B = [val for sublist in simThruster.thrLoc_B for val in sublist] fswThruster.tHatThrust_B = [val for sublist in simThruster.thrDir_B for val in sublist] messaging.ThrustConfigArray_setitem(thrMessage.thrusters, i, fswThruster) i += 1 thrMessage.numThrusters = len(self.thrusterList.values()) thrConfigMsg = messaging.THRArrayConfigMsg().write(thrMessage) thrConfigMsg.this.disown() return thrConfigMsg
# # MOOG Monarc-1 # # Information Source: # http://www.moog.com/literature/Space_Defense/Spacecraft/Propulsion/Monopropellant_Thrusters_Rev_0613.pdf # http://www.moog.com/content/dam/moog/literature/Space_Defense/Spacecraft/Monopropellant_Thrusters_Rev_0613.pdf # # This is a MOOG mono-propellant thruster # def MOOG_Monarc_1(self, TH): # maximum thrust [N] TH.MaxThrust = 0.9 # minimum thruster on time [s] TH.MinOnTime = 0.020 # Isp value [s] TH.steadyIsp = 227.5 TH.areaNozzle = 0.000079 # [m^2] return # # MOOG Monarc-5 # # Information Source: # http://www.moog.com/literature/Space_Defense/Spacecraft/Propulsion/Monopropellant_Thrusters_Rev_0613.pdf # http://www.moog.com/content/dam/moog/literature/Space_Defense/Spacecraft/Monopropellant_Thrusters_Rev_0613.pdf # # This is a MOOG mono-propellant thruster # def MOOG_Monarc_5(self, TH): # maximum thrust [N] TH.MaxThrust = 4.5 # minimum thruster on time [s] TH.MinOnTime = 0.020 # Isp value [s] TH.steadyIsp = 226.1 TH.areaNozzle = 0.0020 # [m^2] return # # MOOG Monarc-22-6 # # Information Source: # http://www.moog.com/literature/Space_Defense/Spacecraft/Propulsion/Monopropellant_Thrusters_Rev_0613.pdf # http://www.moog.com/content/dam/moog/literature/Space_Defense/Spacecraft/Monopropellant_Thrusters_Rev_0613.pdf # # This is a MOOG mono-propellant thruster # def MOOG_Monarc_22_6(self, TH): # maximum thrust [N] TH.MaxThrust = 22.0 # minimum thruster on time [s] TH.MinOnTime = 0.020 # Isp value [s] TH.steadyIsp = 229.5 TH.areaNozzle = 0.0045 # [m^2] return # # MOOG Monarc-22-12 # # Information Source: # http://www.moog.com/literature/Space_Defense/Spacecraft/Propulsion/Monopropellant_Thrusters_Rev_0613.pdf # http://www.moog.com/content/dam/moog/literature/Space_Defense/Spacecraft/Monopropellant_Thrusters_Rev_0613.pdf # # This is a MOOG mono-propellant thruster # def MOOG_Monarc_22_12(self, TH): # maximum thrust [N] TH.MaxThrust = 22.0 # minimum thruster on time [s] TH.MinOnTime = 0.020 # Isp value [s] TH.steadyIsp = 228.1 TH.areaNozzle = 0.0088 # [m^2] return # # MOOG Monarc-90LT # # Information Source: # http://www.moog.com/literature/Space_Defense/Spacecraft/Propulsion/Monopropellant_Thrusters_Rev_0613.pdf # http://www.moog.com/content/dam/moog/literature/Space_Defense/Spacecraft/Monopropellant_Thrusters_Rev_0613.pdf # # This is a MOOG mono-propellant thruster # def MOOG_Monarc_90LT(self, TH): # maximum thrust [N] TH.MaxThrust = 90.0 # minimum thruster on time [s] TH.MinOnTime = 0.020 # Isp value [s] TH.steadyIsp = 232.1 TH.areaNozzle = 0.0222 # [m^2] return # # MOOG Monarc-90HT # # Information Source: # http://www.moog.com/literature/Space_Defense/Spacecraft/Propulsion/Monopropellant_Thrusters_Rev_0613.pdf # http://www.moog.com/content/dam/moog/literature/Space_Defense/Spacecraft/Monopropellant_Thrusters_Rev_0613.pdf # This is a MOOG mono-propellant thruster # def MOOG_Monarc_90HT(self, TH): # maximum thrust [N] TH.MaxThrust = 116.0 # minimum thruster on time [s] TH.MinOnTime = 0.010 # Isp value [s] TH.steadyIsp = 234.0 TH.areaNozzle = 0.0222 # [m^2] return # # MOOG Monarc-445 # # Information Source: # http://www.moog.com/literature/Space_Defense/Spacecraft/Propulsion/Monopropellant_Thrusters_Rev_0613.pdf # http://www.moog.com/content/dam/moog/literature/Space_Defense/Spacecraft/Monopropellant_Thrusters_Rev_0613.pdf # # This is a MOOG mono-propellant thruster # def MOOG_Monarc_445(self, TH): # maximum thrust [N] TH.MaxThrust = 445.0 # minimum thruster on time [s] TH.MinOnTime = 0.025 # Isp value [s] TH.steadyIsp = 234.0 TH.areaNozzle = 0.06881 # [m^2] return def SEP(self, TH): # maximum thrust [N] TH.MaxThrust = 0.030 # minimum thruster on time [s] TH.MinOnTime = 0.025 # Isp value [s] TH.steadyIsp = 3000.0 # maximum swirl torque [Nm] TH.MaxSwirlTorque = 0.05 TH.areaNozzle = 0.06881 # [m^2] return def TEST_Thruster(self, TH): # maximum thrust [N] TH.MaxThrust = 0.9 # minimum thruster on time [s] TH.MinOnTime = 0.020 # Isp value [s] TH.steadyIsp = 227.5 # nozzle area [m^2] TH.areaNozzle = 0.07 return def Blank_Thruster(self, TH): # this method doesn't set any thruster properties. Rather, it is assumed that all thruster # properties are defined explicitly in the create function, or external to the create function return