fastga.models.weight.mass_breakdown.c_systems.c2_life_support_systems_weight module

Python module for life support systems weight calculation, part of the systems mass computation.

class fastga.models.weight.mass_breakdown.c_systems.c2_life_support_systems_weight.ComputeLifeSupportSystemsWeight(**kwargs)

Bases: openmdao.core.explicitcomponent.ExplicitComponent

Weight estimation for life support systems

This includes only air conditioning / pressurization. Anti-icing is bundled up with the air-conditioning weight

Insulation, internal lighting system, permanent security kits are neglected. Seats and installation of crew are already evaluated within d2_passenger_seats_weight

Based on a statistical analysis. See [Ray12] but can also be found in [Gud13] for the air conditioning and de-icing and [Ros85a] for the fixed oxygen weight

Store some bound methods so we can detect runtime overrides.

setup()

Declare inputs and outputs.

Available attributes:

name pathname comm options

compute(inputs, outputs, discrete_inputs=None, discrete_outputs=None)

Compute outputs given inputs. The model is assumed to be in an unscaled state.

Parameters

• inputs (Vector) – Unscaled, dimensional input variables read via inputs[key].

• outputs (Vector) – Unscaled, dimensional output variables read via outputs[key].

• discrete_inputs (dict or None) – If not None, dict containing discrete input values.

• discrete_outputs (dict or None) – If not None, dict containing discrete output values.

compute_partials(inputs, partials, discrete_inputs=None)

Compute sub-jacobian parts. The model is assumed to be in an unscaled state.

Parameters

• inputs (Vector) – Unscaled, dimensional input variables read via inputs[key].

• partials (Jacobian) – Sub-jac components written to partials[output_name, input_name]..

• discrete_inputs (dict or None) – If not None, dict containing discrete input values.

class fastga.models.weight.mass_breakdown.c_systems.c2_life_support_systems_weight.ComputeLifeSupportSystemsWeightFLOPS(**kwargs)

Bases: openmdao.core.explicitcomponent.ExplicitComponent

Weight estimation for life support systems

This includes only air conditioning / pressurization, anti-icing and oxygen

Insulation, internal lighting system, permanent security kits are neglected. Seats and installation of crew are already evaluated within d2_passenger_seats_weight

Based on a statistical analysis. See [WHM17] for de-icing and air conditioning and [Ros85a] for the fixed oxygen weight.

Store some bound methods so we can detect runtime overrides.

setup()

Declare inputs and outputs.

Available attributes:

name pathname comm options

compute(inputs, outputs, discrete_inputs=None, discrete_outputs=None)

Compute outputs given inputs. The model is assumed to be in an unscaled state.

Parameters

• inputs (Vector) – Unscaled, dimensional input variables read via inputs[key].

• outputs (Vector) – Unscaled, dimensional output variables read via outputs[key].

• discrete_inputs (dict or None) – If not None, dict containing discrete input values.

• discrete_outputs (dict or None) – If not None, dict containing discrete output values.

compute_partials(inputs, partials, discrete_inputs=None)

Compute sub-jacobian parts. The model is assumed to be in an unscaled state.

Parameters

• inputs (Vector) – Unscaled, dimensional input variables read via inputs[key].

• partials (Jacobian) – Sub-jac components written to partials[output_name, input_name]..

• discrete_inputs (dict or None) – If not None, dict containing discrete input values.