string_tension_static — DRIVE diabolo op

• Data kinds: scalar × table → table

• Call: import fullseye as fs; fs.ledger.string_tension_static(stick_gap: 'float', params: 'dict') -> 'dict' (to call the implementation directly, import diabolo; diabolo.string_tension_static(stick_gap: 'float', params: 'dict') -> 'dict'; from the registry, opsdrive.get("string_tension_static"))

Usage

Sticks stopped at the same height with spacing 2c, diabolo at rest at the lowest point: sag b = √(a² − c²), tension T = m g a / (2b), angle of the string from horizontal atan2(b, c). Raises ValueError: spacing outside (0, string).

References (sample data, literature)

• Sample-data catalog (download URLs / licences) — 2-D uses skimage.data (BSD/public domain) plus synthetic images; 3-D lists download URLs for real data sources (Stanford, PDS, …).

• Operator provenance and references — the sources of the research/methods this op family came from.

• The canonical algorithm (author, year) and its uses are named in the family usage guide above.

Runnable examples (verified samples that actually call this op)

• poc_diabolo_model_and_vision — py -3.11 examples/poc_diabolo_model_and_vision.py

Ops the type connects to (they accept table as input)

course_layout · course_occupancy · course_contains · world_build · world_camera · world_move · lidar_scan · rss_longitudinal_same

Same category (diabolo)

diabolo_params · diabolo_spheroid · spheroid_closest · diabolo_dynamics_step · diabolo_simulate · diabolo_state_sequence · diabolo_throw_catch_truth · string_tension_from_sag

*Provenance: diabolo.py — DRIVE operator registry. This per-op note is generated by tools/opdocs.py md (do not hand-edit).*

© 2026 Kazufumi Furuse — Fullseye operator documentation. Licensed under Apache-2.0.