latom.reader.reader_heo_2d

@authors: Alberto FOSSA’ Giuliana Elena MICELI

Classes

Reader(db[, case_id, db_exp])	Reader class loads and displays stored simulations using an OpenMDAO CaseReader class instance.
TwoDim3PhasesLLO2HEOReader(body, db[, …])	TwoDim3PhasesLLO2HEOReader class loads and displays a stored simulation corresponding to a three-phases transfer trajectory from LLO to HEO using an OpenMDAO CaseReader class instance.
TwoDimMultiPhaseSolPlot(r, time, states, …)	Plots the two-dimensional multi phase simulation’s states and controls in time and in the xy plane.
TwoDimOrb(gm, **kwargs)	Defines a two-dimensional orbit from its keplerian parameters.

class latom.reader.reader_heo_2d.TwoDim3PhasesLLO2HEOReader(body, db, case_id='final', db_exp=None, scaled=False)

Bases: latom.reader.reader.Reader

TwoDim3PhasesLLO2HEOReader class loads and displays a stored simulation corresponding to a three-phases transfer trajectory from LLO to HEO using an OpenMDAO CaseReader class instance.

Parameters

• body (Primary) – Central attracting body

• db (str) – Full path of the database where the solution is stored

• case_id (str, optional) – Case identifier, initial to load the first iteration, final to load the final solution. Default is final

• db_exp (str or None, optional) – Full path of the database where the explicit simulation is stored or None. Default is None

• scaled (bool, optional) – False to retrieve the solution in dimensional units, True otherwise. Default is False

Variables

• body (Primary) – Central attracting body

• gm_res (float) – Central attracting body standard gravitational parameter [m^3/s^2] or [-]

• rm_res (float) – Central attracting body equatorial radius [m] or [-]

• states_scalers (ndarray) – Scaling parameters for distances, angles, velocities and mass

• phase_name (list) – List of phases names within the OpenMDAO Problem object

• tof (float) – Time of flight for the implicit solution [s]

• time (list) – Time vector for the implicit solution [s]

• states (list) – States time series for the implicit solution as [r, theta, u, v, m]

• controls (list) – Controls variables time series for the implicit solution as [thrust, alpha]

• tof_exp (float or None) – Time of flight for the explicit simulation [s] or None

• time_exp (list or None) – Time vector for the explicit simulation [s] or None

• states_exp (list or None) – States time series for the explicit simulation as [r, theta, u, v, m] or None

• controls_exp (list or None) – Controls variables time series for the explicit simulation as [thrust, alpha] or None

• coe_inj (iterable) – Classical orbital elements at injection as (a, e, h, ta) with a semi-major axis, e eccentricity, h specific angular momentum vector and ta true anomaly

get_time_series(case)

Retrieve the time of flight, time vector and states, controls and minimum safe altitude time series for the specified case and kind of transfer.

Parameters

case (Case) – OpenMDAO Case object

Returns

• tof (float) – Time of flight for the given Case [s]

• time (list) – Time vector for the given Case [s]

• states (list) – States time series for the given Case as [r, theta, u, v, m]

• controls (list) – Controls variables time series for the given Case as [thrust, alpha]

plot()

Plot the optimal transfer trajectory corresponding to the loaded Case.