default.its

###############################################################################
# itsme configuration file (.its)
#
# author: Carlos Souza
###############################################################################


###############################################################################
[settings] # Overall settings for SGRA
#
# Default initialization option (either 'newSol or 'loadSol')
defOpt = loadSol
#newSol
#
# Source for initial guess (either 'extSol' or 'naive' or 'default')
#initOpt = extSol
#
# Directory for loading a starting solution
#loadSolDir = 'defaults' + os.sep + probName+'_solInitRest.pkl'
#
# Directory for loading and alternative solution (for comparing)
#loadAltSolDir = ''
#
# Gradient-restoration cycle: solution plotting rate
GRplotSolRate = 20
#
#
# Gradient-restoration cycle: solution saving rate
GRsaveSolRate = 100
#
#
# Gradient-restoration cycle: pausing rate
GRpausRate = 10000
#
# 
# Gradient phase: gradient step history plotting rate
GradHistShowRate = 20
#
#
# ??? Restoration phase: restoration solution plotting rate ??
RestPlotSolRate = 20
#
#
# ??? Restoration phase: restoration step history plotting rate ??
RestHistShowRate = 100
#
#
# Gradient-restoration cycle: eigenvalue plotting rate
ShowEigRate = 20
#
#
# Gradient-restoration cycle: "gradient-restoration ratio" showing rate
ShowGRrateRate = 20
#
#
# Gradient phase: use parallel computing?
PrllGradLMPBVP = True
#
# Restoration phase: use parallel computing?
PrllRestLMPBVP = True
#
###############################################################################
[vehicle] # Vehicle parameters
# Payload mass [kg]
Mu = 100
#
# Number of stages
NStag = 4
#
# Specific impulse [s]
Isp = 450
#
# Structural inefficiency (defined by Cornelisse as efficiency)
efes = 0.05
#
# Thrust [kN]
T = 40.0
#
# softness of the transions of propulsive curve
softness = 0.3
#
# Aerodynamic coefficients
#
CL0 = 0.0
#
# (B1 Miele 1998)
CL1 = 0.8
#
# (A0 Miele 1998)
CD0 = 0.05
#
# (A2 Miele 1998)
CD2 = 0.5
#
# Reference area in [km2]
s_ref = 0.7853981633974482e-06
#
###############################################################################
[initial] # Initial state constants
#
# Initial altitude[km]
h = 0.0
#
# Initial velocity [km/s]
V = 1.0e-6
#
# Initial flight path angle [°]
gamma = 90.0
#
###############################################################################
[final] # Final state constants
#
# Final orbital altitude [km]
h = 463.0
#
# Final flight path angle [°]
gamma = 0.0
#
###############################################################################
[trajectory] # Trajectory parameters
#
# Maximal angle of attack for attitude maneuver [°]
AoAmax = 3.0
#
# Initial time for attitude maneuver [s]
tAoA1 = 3.7
#
# Duration of attitude maneuver [s]
tAoA = 10.0
#
###############################################################################
[trajmods] # Trajectory modifications
#
# Pitch-damping center [s]
DampCent = -10.0
#
# Pitch-damping slope [-]
DampSlop = 3.0
#
# Target heights for extra arcs (without stage separation) [km]
TargHeig = 250.
#
###############################################################################
[accel] # Acceleration limitation parameters
#
# Maximum tangential acceleration [g]
acc_max = 3.0
#
# Penalty function mode [‘lin’,’quad’,’tanh’]
PFmode = quad
#
# Relative tolerance for maximum acceleration [-]
acc_max_relTol = 0.1
#
# Penalty function value at tolerance acceleration [-]
PFtol = 1.0e-3
#
###############################################################################
[sgra] # Internal SGRA parameters
#
# Tolerance for P functional
tolP = 1e-12
#
# Tolerance for Q functional
tolQ = 1e-4
#
# Pi lower limits
pi_min = 0.0, 0.0, 0.0, 0.0, 0.0
#
# Pi upper limits
pi_max = None, None, None, None, None
#
# Number of divisions in time array [-]
N = 501
#
# Gradient Step Search: P limit constant (see grad_sgra.py) [-]
GSS_PLimCte = 1.0e12
#
# Grad Step Search: step limit closeness tolerance (see grad_sgra.py) [-]
GSS_stopStepLimTol = 1.0e-2
#
# Grad Step Search: objective gradient tolerance (see grad_sgra.py) [-]
GSS_stopObjDerTol = 1.0e-4
#
# Grad Step Search: max number of objective evaluations (see grad_sgra.py) [-]
GSS_stopNEvalLim = 500
#
# Grad Step Search: step tolerance for finding limit (see grad_sgra.py) [-]
GSS_findLimStepTol = 1.0e-2
#
###############################################################################
[enviroment] # Enviroment constants
#
# Gravitational parameter [km3/s2]
GM = 398600.4415
#
# Earth radius [km]
R = 6371.0
#
# Earth amgular velocity of ratation [rad/2]
we = 0.0
#
###############################################################################
[solver] # Solver parameters
#
guess = 1, 1, 1
#
limit = 1, 1, 1
#
tol = 1e-8
#
margin = 0.04
#