Function deadband 

pub fn deadband(value: f32, center: f32, width: f32) -> f32

Holds a reading at a center value while it stays within a band, ignoring small wiggle.

A reading that hovers near a setpoint jitters a little in both directions. Acting on that jitter makes an actuator chatter - a valve or heater switching on and off, “hunting” around the target. A deadband ignores it: while value is within width of center the center is returned unchanged, so nothing downstream reacts; once value moves beyond the band it passes through as-is.

Arguments

• value - the reading to shape.
• center - the value the band is centered on.
• width - the half-width of the band; its magnitude is used, so the band runs from center - width to center + width.

Returns

center when value is within width of it, otherwise value unchanged.

Examples

use pamoja_kit::deadband;

// A setpoint of 20 with a 0.5 deadband ignores small wiggle around it.
assert_eq!(deadband(20.2, 20.0, 0.5), 20.0); // within the band: held at center
assert_eq!(deadband(21.0, 20.0, 0.5), 21.0); // beyond the band: passes through