FA-93572 / Solar tracker geometry / Member archive

Fixed-tilt row pitch for a design sun: footprint and height terms · case 02

Flat rows get a large shadow allowance and steep rows get almost none.

Member previewVariant 2 · 3 implementations · 7 checks per implementation

Case contract

Rows of slant length length (mm) tilted by tilt degrees face row_az. The shadow reaches forward height*max(cos(sun_az - row_az), 0)/tan(sun_el). Minimum unshaded pitch = length*cos(tilt) + shadow. Return [pitch rounded 3, length/pitch rounded 4]; None when sun_el <= 0.

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
normal: winter noon design sun	`[7464.102, 0.2679]`	`[5464.102, 0.366]`	Failed

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