FA-93750 / Solar tracker geometry / Member archive

Module edge ground clearance limit: hub below clearance · case 05

A tracker mounted too low is forced to a steep angle.

Member previewVariant 5 · 3 implementations · 7 checks per implementation

Case contract

Hub height h and module width w in mm. Maximum rotation keeps the low edge at least clear above flat ground: asin((h - clear)/(w/2)), 90 when that ratio >= 1, 0 when <= 0. The command is theta clamped to +-max. Reported clearance is h - (w/2)|sin cmd| minus the ground rise under the low edge, side*(w/2)cos(cmd)tan(slope), where side is the sign of cmd or, at 0, the sign of slope (>= 0 counts positive). Return [cmd rounded 3, clearance rounded 1].

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
boundary: hub below required clearance	`[5.739, 1100.0]`	`[-0.0, 1200.0]`	Failed

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

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