FA-93690 / Solar tracker geometry / Member archive

Overcast diffuse flat stow: night detection · case 05

Clear-sky samples with no diffuse reading are reported as night.

Member previewVariant 5 · 3 implementations · 7 checks per implementation

Case contract

ghi <= 0 returns [0.0, night]. Diffuse fraction df = dhi*100/ghi percent (may exceed 100 with sensor noise). df >= thresh_pct: [0.0, 'diffuse']. If blend > 0 and df > thresh_pct - blend the angle is ideal*(thresh_pct - df)/blend ('blend'). Otherwise [ideal, 'track']. Angles rounded to 3.

Why this case matters

Single-axis and dual-axis solar trackers turn a sun direction into actuator commands; a sign, frame or limit mistake points a whole plant away from the sun or into a mechanical stop.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
regression: night detection	`[0.0, "night"]`	`[-50.0, "track"]`	Failed

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This record includes three runnable implementations, regression fixtures, execution results, and source hashes.

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