Struct StructuralPCA 

pub struct StructuralPCA {
    pub t2_ucl: f64,
    pub q_ucl: f64,
    pub top_k_sensors: usize,
}

Structural PCA module — provides the “why” to the PCA “what”.

Given a PcaObservation from the existing FDC system, this module:

1. Classifies the excursion into four structural categories (Nominal / ModelledShift / UnmodelledExcursion / JointExcursion).
2. When loadings and residuals are available, identifies the dominant physical sensors responsible for the deviation.
3. Emits a StructuralInterpretation that can be serialised into the run manifest and the traceability audit trail.

Thresholds

The control limits for T² and Q are obtained from the FDC model’s healthy phase statistics. They must be provided at construction time; the DSFB engine never re-computes these limits from raw data.

Fields

t2_ucl: f64

Upper control limit for T² (typically the 99th percentile of the chi-squared distribution with n_components degrees of freedom).

q_ucl: f64

Upper control limit for Q / SPE.

top_k_sensors: usize

Number of dominant sensors to report in the structural interpretation.

Implementations

impl StructuralPCA

pub fn interpret(&self, obs: &PcaObservation) -> StructuralInterpretation

Interpret a single PcaObservation and return the structural verdict.

Trait Implementations

impl Clone for StructuralPCA

fn clone(&self) -> StructuralPCA

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for StructuralPCA

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for StructuralPCA

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for StructuralPCA

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for StructuralPCA

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.