Struct ResidualSign 

pub struct ResidualSign {
    pub residual: f64,
    pub drift: f64,
    pub slew: f64,
    pub timestamp_ns: u64,
    pub source: ResidualSource,
}

The residual sign: DSFB’s primary inferential object.

Captures the instantaneous structural state of a residual trajectory:

• residual (r): raw deviation from baseline
• drift (ω): first derivative — direction and rate of change
• slew (α): second derivative — curvature / acceleration of change

These three quantities, together with the admissibility envelope and grammar state, fully determine the structural interpretation.

Fields

residual: f64

Raw residual: r(k) = measured(k) - baseline(k).

drift: f64

Drift: estimated first derivative of the residual trajectory. Positive drift = residual growing (degradation direction).

slew: f64

Slew: estimated second derivative of the residual trajectory. Positive slew = drift accelerating (worsening curvature).

timestamp_ns: u64

Monotonic timestamp (nanoseconds) of this observation.

source: ResidualSource

Source channel that produced this residual.

Trait Implementations

impl Clone for ResidualSign

fn clone(&self) -> ResidualSign

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ResidualSign

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

Formats the value using the given formatter.

impl Copy for ResidualSign