fastga_he.models.propulsion.components.connectors.dc_cable.components.perf_resistance_no_loop module

class fastga_he.models.propulsion.components.connectors.dc_cable.components.perf_resistance_no_loop.PerformancesResistanceNoLoop(**kwargs)[source]

Bases: ExplicitComponent

This variation of the resistance module has been created after the realization that if the thermal dynamics of the cable is ignored (steady state), an explicit expression of the resistance could be obtained by reformulating the formulas which would suppress the need to iterate on the temperature while still providing it. This means that if this model is to be used, it HAS to be with the steady-state temperature model, hence why a warning is raised if the proper submodel is not used.

In those condition, the resistance is the solution of the following polynomial expression:

R**2 - R * R_ref * (1 + alpha * (T_ext - T_ref)) - alpha * R_ref * Delta_U**2 * n_c**2 / h / S = 0

Store some bound methods so we can detect runtime overrides.

initialize()[source]

Perform any one-time initialization run at instantiation.

setup()[source]

Declare inputs and outputs.

Available attributes:

name pathname comm options

compute(inputs, outputs, discrete_inputs=None, discrete_outputs=None)[source]

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

An inherited component may choose to either override this function or to define a compute_primal function.

Parameters:

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

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

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

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

compute_partials(inputs, partials, discrete_inputs=None)[source]

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.