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UpdateCouplingParameterMethod_SubgradientMultipliers¶
Standard LC coupling parameter update method.
This module implements the standard Lagrangian Coordination update strategy for Lagrange multipliers (without penalty weights).
Classes¶
UpdateCouplingParameterMethod_SubgradientMultipliers¶
Inherits from: UpdateCouplingParameterMethodInterface
Standard LC update method for coupling parameters.
Implements the Lagrangian coordination update rules (without penalty weights): - Multipliers: λ_new = λ_old + beta * inconsistency
Note: gamma is not used in LC since there are no penalty weights to update.
Attributes:
_beta: Multiplier update step size (must be > 0).
_initialmultiplier: Initial value for Lagrange multipliers.
Methods¶
init(self, beta: float, initialmultiplier: float) → None
Initialize the standard LC update method.
Args:
beta: Multiplier update step size.
initialmultiplier: Initial value for Lagrange multipliers.
validate_inputs(self) → None
Validate the hyperparameters of this update method.
Raises:
ValueError: If any parameter is outside the allowed range.
update_CoordinationMultipliers(self, multiplierin: List[float], inconsistencyin: List[float]) → None
Update Lagrange multipliers using the standard LC subgradient rule.
Update formula: λ_new = λ_old + beta * inconsistency
Args:
multiplierin: Current multiplier values to update in place.
inconsistencyin: Current inconsistency values.
get_InitialMultiplier(self) → float
Get the initial Lagrange multiplier value.
Returns:
The initial Lagrange multiplier value.
print_startup_summary(self) → None
Print the subgradient multiplier parameters beta and initial multiplier at startup.
print_termination_summary(self) → None
Print the subgradient multiplier parameters beta and initial multiplier at the end.
update_state(self, other: UpdateCouplingParameterMethod_SubgradientMultipliers) → None
Update the state of this instance with values from another instance.
Args:
other: The source instance containing updated values from parallel execution.